{"id":77,"date":"2026-05-03T17:13:56","date_gmt":"2026-05-03T09:13:56","guid":{"rendered":"https:\/\/zhwj326.top\/?p=77"},"modified":"2026-05-07T20:55:57","modified_gmt":"2026-05-07T12:55:57","slug":"java%e5%a4%8d%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/zhwj326.top\/index.php\/2026\/05\/03\/java%e5%a4%8d%e4%b9%a0\/","title":{"rendered":"java\u590d\u4e60"},"content":{"rendered":"\n

java<\/h1>\n\n\n\n

\u4f8b\uff1a<\/p>\n\n\n\n

public class zh{
    public void main(String[] args){
        System.out.println(\"hello,world.\");
    }
}<\/code><\/pre>\n\n\n\n
\u7c7b\uff1a<\/h2>\n\n\n\n
\u4e00\u4e2a\u6587\u4ef6\u53ef\u4ee5\u6709\u591a\u4e2a\u7c7b\uff0c\u4f46\u53ea\u80fd\u6709\u4e00\u4e2a\u4e3b\u7c7b\uff08\u5373Public\u7c7b\uff09\u3002\u7c7b\u91cc\u6709\u5c5e\u6027\uff0c\u6709\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\u5b9a\u4e49\u7c7b\uff1aclass<\/code>\u5173\u952e\u5b57<\/p>\n\n\n\n
class xxx {\n \u00a0 \u00a0\/\/\u5c5e\u6027\n \u00a0 \u00a0int a;\n \u00a0 \u00a0string b;\n \u00a0 \u00a0\/\/\u65b9\u6cd5\n \u00a0 \u00a0void print(){\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(\"hello\");\n \u00a0  }\n}<\/code><\/pre>\n\n\n\n
*\u4fee\u9970\u7b26\uff1a<\/h2>\n\n\n\n
\u7528\u6765\u5b9a\u4e49\u7c7b\uff0c\u65b9\u6cd5\uff0c\u53d8\u91cf\uff1a1.\u8bbf\u95ee\u4fee\u9970\u7b26\uff1b2.\u975e\u8bbf\u95ee\u4fee\u9970\u7b26\u3002<\/p>\n\n\n\n
\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a<\/h3>\n\n\n\n
public(\u516c\u5171)\uff1a<\/strong><\/th>\u53ef\u5728\u4e0d\u540c\u5305\u4e2d\u8bbf\u95ee<\/strong><\/th><\/tr><\/thead>
protected(\u88ab\u4fdd\u62a4):<\/strong><\/td>\u4ec5\u5728\u540c\u4e00\u5305<\/strong>\u5185\u6216\u5b50\u7c7b<\/strong>\u53ef\u8bbf\u95ee<\/td><\/tr>
private(\u79c1\u6709):<\/strong><\/td>\u4ec5\u5728\u540c\u4e00\u7c7b<\/strong>\u91cc\u53ef\u8bbf\u95ee<\/td><\/tr>
\u9ed8\u8ba4\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a<\/strong><\/td>\u4ec5\u540c\u4e00\u5305<\/strong>\u5185\u53ef\u8bbf\u95ee<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u975e\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a<\/strong><\/h3>\n\n\n\n
static\uff1bfinal\uff0cabstract\uff0csynchronized\uff0ctransient\uff0cvolatile<\/p>\n\n\n\n
\u57fa\u7840\uff1a<\/strong><\/h2>\n\n\n\n
\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff1a<\/strong><\/h3>\n\n\n\n
\u516d\u79cd\u6570\u5b57\u7c7b\u578b\uff08\u56db\u4e2a\u6574\u6570\u578b\uff0c\u4e24\u4e2a\u6d6e\u70b9\u578b\uff09\uff0c\u4e00\u79cd\u5b57\u7b26\u7c7b\u578b\uff0c\u8fd8\u6709\u4e00\u79cd\u5e03\u5c14\u578b\u3002<\/strong><\/p>\n\n\n\n
byte\uff0cshort\uff0cint\uff0clong\uff0cfloat\uff0cdouble\uff0cchar\uff0cboolean.<\/strong><\/p>\n\n\n\n
\u53d8\u91cf\u7c7b\u578b\uff1a<\/strong><\/h3>\n\n\n\n
\u5c40\u90e8\u53d8\u91cf\uff1a\u5728\u65b9\u6cd5\uff0c\u51fd\u6570\u6216\u5757\u5185\u90e8\u58f0\u660e\uff1b<\/strong><\/p>\n\n\n\n
\u5b9e\u4f8b\u53d8\u91cf\uff08\u6210\u5458\u53d8\u91cf\uff09\uff1a\u5728\u7c7b\u4e2d\u58f0\u660e\uff1b<\/strong><\/p>\n\n\n\n
\u7c7b\u53d8\u91cf\uff08\u9759\u6001\u53d8\u91cf\uff09\uff1a\u5728\u7c7b\u4e2d\u7528static<\/code>\u5173\u952e\u5b57\u58f0\u660e\uff08\u4ec5\u521d\u59cb\u5316\u4e00\u6b21\uff09\uff1b<\/strong><\/p>\n\n\n\n
\u53c2\u6570\u53d8\u91cf\uff1a\u5728\u53c2\u6570\u4f4d\u7f6e\u58f0\u660e<\/strong><\/p>\n\n\n\n
\u8fd0\u7b97\u7b26\uff1a<\/h3>\n\n\n\n
\u7b97\u6570\uff0c\u81ea\u589e\u81ea\u51cf\uff0c\u8d4b\u503c\uff0c\u5173\u7cfb\uff08\u6bd4\u8f83\uff09\uff0c\u903b\u8f91\uff0c\u4f4d\uff0c\u6761\u4ef6<\/p>\n\n\n\n
instanceof:\u5224\u65ad\u67d0\u5b9e\u4f8b\u662f\u5426\u4e3a\u67d0\u4e2a\u7c7b\u6216\u63a5\u53e3<\/p>\n\n\n\n
\u4f8b:<\/p>\n\n\n\n
boolean result = name instanceof String; \/\/ \u7531\u4e8e name \u662f String \u7c7b\u578b\uff0c\u6240\u4ee5\u8fd4\u56de\u771f<\/code><\/pre>\n\n\n\n
\u5faa\u73af\u7ed3\u6784\uff1a<\/h3>\n\n\n\n
1.while 2.do…while 3.for<\/p>\n\n\n\n
\u7279\u6b8a\uff1a\u589e\u5f3afor\u5faa\u73af<\/p>\n\n\n\n
for(\u58f0\u660e\u8bed\u53e5 : \u8868\u8fbe\u5f0f){\n\/\/\u5757\n}\n\/\/\u4f8b\nString[] names = {\"zhangsan\",\"lisi\",\"wangwu\"};\nfor(String name : names){\n \u00a0 \u00a0System.out.println(name);\n}<\/code><\/pre>\n\n\n\n
break\uff0ccontinue\u5173\u952e\u5b57\uff1b<\/p>\n\n\n\n
\u6761\u4ef6\u8bed\u53e5\uff1a<\/h3>\n\n\n\n
if…else\uff0cswitch case\u3002<\/p>\n\n\n\n
*\u6570\u636e\u7c7b\u578b\u8f6c\u6362\uff1a<\/h3>\n\n\n\n
\u9690\u5f0f\u8f6c\u6362\uff1abyte -> short -> int -> long -> float -> double<\/p>\n\n\n\n
\u663e\u5f0f\u8f6c\u6362\uff08\u5f3a\u5236\u8f6c\u6362\uff09\uff1a<\/p>\n\n\n\n
1.\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong>\u8f6c\u5b57\u7b26\u4e32<\/strong>\uff1aString.valueOf() <\/code>\u6216\u8005 +<\/code><\/p>\n\n\n\n
int x = 10;
String y = String.valueOf(x);
String z = x + '';<\/code><\/pre>\n\n\n\n
2.\u5b57\u7b26\u4e32<\/strong>\u8f6c\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong>\uff1axx.parsexx()<\/code><\/p>\n\n\n\n
String s = \"123\";
int x = Integer.parseInt(s);
double y = Double.parseDouble(s);<\/code><\/pre>\n\n\n\n
3.\u57fa\u672c\u7c7b\u578b\u4e4b\u95f4<\/strong>\u7684\u8f6c\u6362\uff1a.xxValue()<\/code><\/p>\n\n\n\n
Number num = 1234.56; \/\/\u5b9e\u9645\u662fDouble\u7c7b\u578b\n\u200b\nSystem.out.println(num.intValue()); \u00a0 \u00a0\/\/ 1234 (\u622a\u65ad\u5c0f\u6570)\nSystem.out.println(num.longValue()); \u00a0 \/\/ 1234\nSystem.out.println(num.floatValue()); \u00a0\/\/ 1234.56\nSystem.out.println(num.doubleValue()); \/\/ 1234.56<\/code><\/pre>\n\n\n\n
Number\u7c7b&Math\u7c7b:<\/h3>\n\n\n\n
Number\u7c7b\uff1a<\/h4>\n\n\n\n
\u7c7b\u540d<\/th>\u5bf9\u5e94\u57fa\u672c\u7c7b\u578b<\/th>\u63cf\u8ff0<\/th><\/tr><\/thead>
Byte<\/td>byte<\/td>\u5b57\u8282\u578b\u5305\u88c5\u7c7b<\/td><\/tr>
Short<\/td>short<\/td>\u77ed\u6574\u578b\u5305\u88c5\u7c7b<\/td><\/tr>
Integer<\/td>int<\/td>\u6574\u578b\u5305\u88c5\u7c7b<\/td><\/tr>
Long<\/td>long<\/td>\u957f\u6574\u578b\u5305\u88c5\u7c7b<\/td><\/tr>
Float<\/td>float<\/td>\u5355\u7cbe\u5ea6\u6d6e\u70b9\u578b\u5305\u88c5\u7c7b<\/td><\/tr>
Double<\/td>double<\/td>\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b\u5305\u88c5\u7c7b<\/td><\/tr>
BigInteger<\/td>–<\/td>\u4e0d\u53ef\u53d8\u4efb\u610f\u7cbe\u5ea6\u6574\u6570<\/td><\/tr>
BigDecimal<\/td>–<\/td>\u4e0d\u53ef\u53d8\u4efb\u610f\u7cbe\u5ea6\u6709\u7b26\u53f7\u5341\u8fdb\u5236\u6570<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Integer x = 3<\/code>\u5c31\u662fjava\u7f16\u8bd1\u5668\u8fdb\u884c\u4e86\u81ea\u52a8\u88c5\u7bb1\uff0c\u5373\uff1aInteger x = Integer.valueOf(3)<\/code><\/p>\n\n\n\n
\u4f8b\uff1aint\u548cInteger\u7684\u533a\u522b<\/p>\n\n\n\n
\u5bf9\u6bd4\u7ef4\u5ea6<\/th>int x = 3<\/code><\/th>Integer x = 3<\/code><\/th><\/tr><\/thead>
\u7c7b\u578b<\/td>\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/td>\u5f15\u7528\u7c7b\u578b\uff08\u5305\u88c5\u7c7b\uff09<\/td><\/tr>
\u672c\u8d28<\/td>\u5c31\u662f\u4e00\u4e2a\u6570\u5b57 3<\/code>\uff0c\u5b58\u5728\u6808\u91cc<\/td>\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5b58\u7684\u662f\u5806\u91cc\u5bf9\u8c61\u7684\u5730\u5740<\/td><\/tr>
\u9ed8\u8ba4\u503c<\/td>0<\/code><\/td>null<\/code>\uff08\u8fd9\u662f\u6700\u5173\u952e\u7684\u5751\u4e4b\u4e00\uff09<\/td><\/tr>
\u80fd\u5426\u4e3a null<\/td>\u4e0d\u80fd<\/td>\u80fd\uff08\u8868\u793a\u201c\u6ca1\u6709\u503c\u201d\uff09<\/td><\/tr>
\u5185\u5b58\u5360\u7528<\/td>4 \u5b57\u8282\uff0c\u8f7b\u91cf<\/td>\u7ea6 16 \u5b57\u8282\uff08\u5bf9\u8c61\u5934 + \u5185\u90e8 int \u503c\uff09\uff0c\u6709\u5f00\u9500<\/td><\/tr>
\u65b9\u6cd5\u652f\u6301<\/td>\u6ca1\u6709\u65b9\u6cd5<\/td>\u6709\uff0c\u6bd4\u5982 toString()<\/code>\u3001compareTo()<\/code>\u3001parseInt()<\/code><\/td><\/tr>
\u96c6\u5408\u652f\u6301<\/td>\u4e0d\u652f\u6301\uff08List<int><\/code> \u7f16\u8bd1\u62a5\u9519\uff09<\/td>\u652f\u6301\uff08List<Integer><\/code> \u662f\u5408\u6cd5\u7684\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
\/\/ \u60c5\u51b5\u4e00\uff1aint \u4e0e int \u6bd4\u8f83 \u2014\u2014 \u76f4\u63a5\u6bd4\u6570\u503c\nint a = 128;\nint b = 128;\nSystem.out.println(a == b); \u00a0\/\/ true \n\u200b\n\/\/ \u60c5\u51b5\u4e8c\uff1aInteger \u4e0e Integer \u6bd4\u8f83 \u2014\u2014 \u6bd4\u7684\u662f\u5730\u5740\uff01\nInteger c = 128;\nInteger d = 128;\nSystem.out.println(c == d); \u00a0\/\/ false \uff08\u8d85\u51fa\u7f13\u5b58\u8303\u56f4\uff0c\u662f\u4e24\u4e2a\u4e0d\u540c\u5bf9\u8c61\uff09\n\u200b\n\/\/ \u60c5\u51b5\u4e09\uff1a\u4f46\u5982\u679c\u662f 127 \u5462\uff1f\nInteger e = 127;\nInteger f = 127;\nSystem.out.println(e == f); \u00a0\/\/ true \uff08\u56e0\u4e3a Integer \u6709\u7f13\u5b58\u6c60\uff09\n\u200b\n\/\/\u56e0\u6b64\u4e00\u822c\u7528equals()\u8fdb\u884c\u6bd4\u8f83\nInteger x = 200;\nInteger y = 200;\nSystem.out.println(x.equals(y)); \u00a0\/\/ true  \u8fd9\u624d\u662f\u6b63\u786e\u7684\u6bd4\u8f83\u65b9\u5f0f<\/code><\/pre>\n\n\n\n
Math\u7c7b\uff1a<\/h4>\n\n\n\n
1.\u6307\u5bf9\u8fd0\u7b97\uff1a<\/p>\n\n\n\n
Math.exp(1); \u00a0 \u00a0\/\/ e^1 \u2248 2.718\nMath.log(Math.E); \/\/ ln(e) = 1\nMath.log10(100); \/\/ log10(100) = 2<\/code><\/pre>\n\n\n\n
2.\u968f\u673a\u6570\uff1a<\/p>\n\n\n\n
\/\/ \u751f\u6210[0.0, 1.0)\u4e4b\u95f4\u7684\u968f\u673a\u6570\ndouble random = Math.random(); \n\u200b\n\/\/ \u751f\u6210[1, 100]\u7684\u968f\u673a\u6574\u6570\nint randomInt = (int)(Math.random() * 100) + 1;<\/code><\/pre>\n\n\n\n
3.toString():\u5c06\u5bf9\u8c61<\/strong>\u4ee5\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u8fd4\u56de<\/p>\n\n\n\n
\/\/ \u6570\u5b57\u3001\u5b57\u7b26\u4e32\u3001\u65e5\u671f\u3001\u96c6\u5408\uff0c\u76f4\u63a5\u6253\u5370\u5c31\u5f88\u6e05\u6670\nInteger num = 123;\nSystem.out.println(num.toString()); \u00a0 \/\/ \u8f93\u51fa: \"123\"\n\u200b\nString text = \"Hello\";\nSystem.out.println(text.toString()); \u00a0\/\/ \u8f93\u51fa: \"Hello\"\n\u200b\nDate now = new Date();\nSystem.out.println(now.toString()); \u00a0 \/\/ \u8f93\u51fa: Sat May 02 12:42:33 CST 2026\n\u200b\nArrayList<String> list = new ArrayList<>();\nlist.add(\"\u82f9\u679c\");\nlist.add(\"\u9999\u8549\");\nSystem.out.println(list.toString()); \u00a0\/\/ \u8f93\u51fa: [\u82f9\u679c, \u9999\u8549]<\/code><\/pre>\n\n\n\n
4.Math.abs():\u8fd4\u56de\u7edd\u5bf9\u503c<\/p>\n\n\n\n
5.Math.ceil():\u5411\u4e0a\u53d6\u6574<\/p>\n\n\n\n
6.Math.floor():\u5411\u4e0b\u53d6\u6574<\/p>\n\n\n\n
7.Math.round():\u56db\u820d\u4e94\u5165<\/p>\n\n\n\n
8.Math.pow():\u4e8c\u6b21\u65b9<\/p>\n\n\n\n
9.Math.sqrt()\uff1a\u7b97\u6570\u5e73\u65b9\u6839<\/p>\n\n\n\n
Character\u7c7b:<\/h3>\n\n\n\n
\u8f6c\u4e49\u5e8f\u5217\uff1a<\/p>\n\n\n\n
\u8f6c\u4e49\u5e8f\u5217<\/th>\u63cf\u8ff0<\/th><\/tr><\/thead>
\\t<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u63d2\u5165\u4e00\u4e2atab\u952e<\/td><\/tr>
\\b<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u63d2\u5165\u4e00\u4e2a\u540e\u9000\u952e<\/td><\/tr>
\\n<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u6362\u884c<\/td><\/tr>
\\r<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u63d2\u5165\u56de\u8f66<\/td><\/tr>
\\f<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u63d2\u5165\u6362\u9875\u7b26<\/td><\/tr>
‘<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u63d2\u5165\u5355\u5f15\u53f7<\/td><\/tr>
“<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u63d2\u5165\u53cc\u5f15\u53f7<\/td><\/tr>
\\<\/td>\u5728\u6587\u4e2d\u8be5\u5904\u63d2\u5165\u53cd\u659c\u6760<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u5e8f\u53f7<\/th>\u65b9\u6cd5\u4e0e\u63cf\u8ff0<\/th><\/tr><\/thead>
1<\/td>isLetter() \u662f\u5426\u662f\u4e00\u4e2a\u5b57\u6bcd<\/td><\/tr>
2<\/td>isDigit()\u662f\u5426\u662f\u4e00\u4e2a\u6570\u5b57\u5b57\u7b26<\/td><\/tr>
3<\/td>isWhitespace() \u662f\u5426\u662f\u4e00\u4e2a\u7a7a\u767d\u5b57\u7b26<\/td><\/tr>
4<\/td>isUpperCase() \u662f\u5426\u662f\u5927\u5199\u5b57\u6bcd<\/td><\/tr>
5<\/td>isLowerCase() \u662f\u5426\u662f\u5c0f\u5199\u5b57\u6bcd<\/td><\/tr>
6<\/td>toString() \u8fd4\u56de\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u5f62\u5f0f\uff0c\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u4ec5\u4e3a1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
*String\u7c7b\uff1a<\/h3>\n\n\n\n
\u521b\u5efa\u5b57\u7b26\u4e32\uff1a<\/h4>\n\n\n\n
\/\/\u76f4\u63a5\u521b\u5efa\uff0c\u5b58\u50a8\u5728\u5806\u4e2d\nString x = \"123\";\n\/\/\u4f7f\u7528New\u521b\u5efa\nString x = new String(\"123\");\n\/\/\u7531\u5b57\u7b26\u6570\u7ec4\u8f6c\u4e3a\u5b57\u7b26\u4e32\nchar[] array = {\"1\",\"2\",\"3\"};\nString x= new String(array);\/\/x= \"123\"<\/code><\/pre>\n\n\n\n
\u957f\u5ea6\uff1a<\/h4>\n\n\n\n
int len = x.lenght();<\/code><\/pre>\n\n\n\n
\u8fde\u63a5\u5b57\u7b26\u4e32:<\/h4>\n\n\n\n
\/\/concat\u65b9\u6cd5\nstring1.concat(string2);\n\/\/+\nstring1 + string2;<\/code><\/pre>\n\n\n\n
\u521b\u5efa\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff1a<\/h4>\n\n\n\n
\/\/format\u65b9\u6cd5\nString fs;\nfs = String.format(\"\u6d6e\u70b9\u578b\u53d8\u91cf\u7684\u503c\u4e3a \" +\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \"%f, \u6574\u578b\u53d8\u91cf\u7684\u503c\u4e3a \" +\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \" %d, \u5b57\u7b26\u4e32\u53d8\u91cf\u7684\u503c\u4e3a \" +\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \" %s\", floatVar, intVar, stringVar);<\/code><\/pre>\n\n\n\n
\u5e38\u89c1\u65b9\u6cd5\uff1a<\/h4>\n\n\n\n
1.\u6309\u5b57\u5178\u987a\u5e8f\u6bd4\u8f83\uff1aint compareTo(String str);<\/code><\/p>\n\n\n\n
2.\u5b57\u7b26\u4e32\u662f\u5426\u4ee5\u6307\u5b9a\u7684\u540e\u7f00\u7ed3\u675f\uff1aboolean endsWith(String str)<\/code><\/p>\n\n\n\n
3.\u5c06\u5b57\u7b26\u4e32\u4e0e\u6307\u5b9a\u5bf9\u8c61\u6bd4\u8f83\uff1aboolean equals(Object O)<\/code><\/p>\n\n\n\n
4.\u8fd4\u56de\u7b2c\u4e00\u6b21\u51fa\u73b0\u6307\u5b9a\u5b57\u7b26\u4e32\u7684\u7d22\u5f15\uff1aint indexof(String str)<\/code><\/p>\n\n\n\n
5.\u5224\u65ad\u662f\u5426\u5339\u914d\u7ed9\u5b9a\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff1aboolean matchs(String regex)<\/code><\/p>\n\n\n\n
6.\u6839\u636e\u6b63\u5219\u8868\u8fbe\u5f0f\u62c6\u5206\u5b57\u7b26\u4e32\uff1aString[] split(String regex)<\/code><\/p>\n\n\n\n
7.\u5c06\u5b57\u7b26\u4e32\u8f6c\u4e3a\u5b57\u7b26\u6570\u7ec4\uff1achar[] toCharArray()<\/code><\/p>\n\n\n\n
8.\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff1aisEmpty()<\/code><\/p>\n\n\n\n
\u4fee\u6539\u5b57\u7b26\u4e32\uff1a<\/h4>\n\n\n\n
\u6ce8:String \u672c\u8eab\u4e0d\u80fd\u4fee\u6539\uff0c\u9700\u8981\u4f7f\u7528StringBuffer\u7c7b\u6216StringBuilder\u7c7b<\/p>\n\n\n\n
public class Test{\n \u00a0 \u00a0public static void main(String[] args){\n \u00a0 \u00a0 \u00a0 \u00a0StringBuilder sb = new StringBuilder(10);\/\/\u521b\u5efa\u5927\u5c0f\u4e3a10\uff0c\u7c7b\u4f3c\u5b57\u7b26\u6570\u7ec4\u7684\u7a7a\u95f4\n \u00a0 \u00a0 \u00a0 \u00a0sb.append(\"123..\");\/\/\u901a\u8fc7append\u50cf\u7a7a\u95f4\u4e2d\u6dfb\u52a0\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(sb); \u00a0\n \u00a0 \u00a0 \u00a0 \u00a0sb.append(\"!\");\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(sb); \n \u00a0 \u00a0 \u00a0 \u00a0sb.insert(8, \"Java\");\/\/\u7528insert\u5728\u7b2c8\u4e2a\u5f00\u59cb\u63d2\u5165\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(sb); \n \u00a0 \u00a0 \u00a0 \u00a0sb.delete(5,8);\/\/\u5220\u9664[5,8)\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(sb); \u00a0\n \u00a0  }\n}<\/code><\/pre>\n\n\n\n
*\u6570\u7ec4:<\/h3>\n\n\n\n
\u58f0\u660e:<\/h4>\n\n\n\n
dataType[] arrayRefVar;   \/\/ \u9996\u9009\u7684\u65b9\u6cd5\n\u6216\ndataType arrayRefVar[];  \/\/ \u6548\u679c\u76f8\u540c\uff0c\u4f46\u4e0d\u662f\u9996\u9009\u65b9\u6cd5<\/code><\/pre>\n\n\n\n
\u521b\u5efa\uff1a<\/h4>\n\n\n\n
\/\/\u4f7f\u7528new\u521b\u5efa\narray = new int[10];\n\u200b\n\/\/\u58f0\u660e\u7684\u540c\u65f6\u8fdb\u884c\u521b\u5efa\nint[] array = new int[10];\n\/\/\u76f4\u63a5\u521d\u59cb\u5316\nint[] array ={1,2,3,4,5};<\/code><\/pre>\n\n\n\n
\u591a\u7ef4\u6570\u7ec4:<\/h4>\n\n\n\n
String[][] str = new String[3][4];<\/code><\/pre>\n\n\n\n
\u6bcf\u5217\u5355\u72ec\u521b\u5efa\u7a7a\u95f4\uff1a<\/p>\n\n\n\n
String[][] s = new String[2][];
s[0] = new String[2];
s[1] = new String[3];
s[0][0] = new String(\"Good\");
s[0][1] = new String(\"Luck\");
s[1][0] = new String(\"to\");
s[1][1] = new String(\"you\");
s[1][2] = new String(\"!\");<\/code><\/pre>\n\n\n\n
\u8f93\u5165\u8f93\u51fa<\/h3>\n\n\n\n
\u8f93\u51fa\uff1aSystem.out.println()<\/code><\/p>\n\n\n\n
*\u8f93\u5165\uff1aScanner\u7c7b<\/h4>\n\n\n\n
\u5bfc\u5305\uff1a<\/p>\n\n\n\n
import java.util.Scanner;<\/code><\/pre>\n\n\n\n
\u521b\u5efa\u5bf9\u8c61:<\/p>\n\n\n\n
Scanner scan = new Scanner(System.in);<\/code><\/pre>\n\n\n\n
\u901a\u8fc7next()\u6216nextLine()\u8bfb\u53d6\u5b57\u7b26\u4e32\uff1a<\/p>\n\n\n\n
String name = scan.next();\/\/\u4ee5\u7a7a\u767d\u4e3a\u5206\u9694\u7b26\u6216\u7ed3\u675f\u7b26\n\nString name = scan.nextLine();\/\/\u4ee5Enter\u4e3a\u7ed3\u675f\u7b26<\/code><\/pre>\n\n\n\n
\u8bfb\u53d6\u6570\u5b57:<\/p>\n\n\n\n
int x = scan.nextInt();\ndouble y = scan.nextDouble();\n\/\/\u8bfb\u53d6\u524d\u5148\u5224\u65ad\nif(scan.hasNextInt()){\n    int i =scan.nextInt();\n}<\/code><\/pre>\n\n\n\n
\u5173\u95ed\uff1ascan.close();<\/code><\/p>\n\n\n\n
*\u9762\u5411\u5bf9\u8c61<\/h2>\n\n\n\n
\u7c7b\uff08Class\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
    \n
  • \u5b9a\u4e49\u5bf9\u8c61\u7684\u84dd\u56fe\uff0c\u5305\u62ec\u5c5e\u6027<\/strong>\u548c\u65b9\u6cd5<\/strong>\u3002<\/li>\n\n\n\n
  • \u793a\u4f8b\uff1apublic class Car { ... }<\/code><\/li>\n<\/ul>\n\n\n\n
    \u65b9\u6cd5\uff08Method\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
      \n
    • \u5b9a\u4e49\u7c7b\u7684\u884c\u4e3a\uff0c\u5305\u542b\u5728\u7c7b\u4e2d\u7684\u51fd\u6570\u3002<\/li>\n\n\n\n
    • \u793a\u4f8b\uff1apublic void displayInfo() { System.out.println(\"Info\"); }<\/code><\/li>\n<\/ul>\n\n\n\n
      \u7c7b\u65b9\u6cd5\uff1a<\/h4>\n\n\n\n
      static<\/code>\u4fee\u9970\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n
      \u7279\u6027<\/th>\u7c7b\u65b9\u6cd5\uff08static\uff09<\/th>\u5b9e\u4f8b\u65b9\u6cd5<\/th><\/tr><\/thead>
      \u5c5e\u4e8e<\/td>\u7c7b\u672c\u8eab<\/td>\u5bf9\u8c61<\/td><\/tr>
      \u8c03\u7528\u65b9\u5f0f<\/td>\u7c7b\u540d.\u65b9\u6cd5\u540d()<\/code><\/td>\u5bf9\u8c61.\u65b9\u6cd5\u540d()<\/code><\/td><\/tr>
      \u662f\u5426\u6709 this<\/code><\/td>\u274c<\/td>\u2705<\/td><\/tr>
      \u8bbf\u95ee\u5b9e\u4f8b\u53d8\u91cf<\/td>\u274c\uff08\u9700\u901a\u8fc7\u5bf9\u8c61\uff09<\/td>\u2705<\/td><\/tr>
      \u8bbf\u95ee\u7c7b\u53d8\u91cf<\/td>\u2705<\/td>\u2705<\/td><\/tr>
      \u662f\u5426\u53ef\u91cd\u5199<\/td>\u274c\uff08\u53ef\u9690\u85cf\uff09<\/td>\u2705<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
      \u5bf9\u8c61\uff08Object\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
        \n
      • \u7c7b\u7684\u5b9e\u4f8b\uff0c\u5177\u6709\u72b6\u6001\u548c\u884c\u4e3a\u3002<\/li>\n\n\n\n
      • \u793a\u4f8b\uff1aCar myCar = new Car();<\/code><\/li>\n<\/ul>\n\n\n\n
        \u521b\u5efa\u5bf9\u8c61<\/strong>\uff1a<\/h4>\n\n\n\n
          \n
        • \u58f0\u660e<\/strong>\uff1a\u58f0\u660e\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5305\u62ec\u5bf9\u8c61\u540d\u79f0\u548c\u5bf9\u8c61\u7c7b\u578b\u3002<\/li>\n\n\n\n
        • \u5b9e\u4f8b\u5316<\/strong>\uff1a\u4f7f\u7528\u5173\u952e\u5b57 new \u6765\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u3002<\/li>\n\n\n\n
        • \u521d\u59cb\u5316<\/strong>\uff1a\u4f7f\u7528 new \u521b\u5efa\u5bf9\u8c61\u65f6\uff0c\u4f1a\u8c03\u7528\u6784\u9020\u65b9\u6cd5<\/strong>\u521d\u59cb\u5316\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n
          public class Puppy{\n \u00a0 public Puppy(String name){\n \u00a0 \u00a0 \u00a0\/\/\u8fd9\u4e2a\u6784\u9020\u5668\u4ec5\u6709\u4e00\u4e2a\u53c2\u6570\uff1aname\n \u00a0 \u00a0 \u00a0System.out.println(\"\u5c0f\u72d7\u7684\u540d\u5b57\u662f : \" + name ); \n \u00a0 }\n \u00a0 public static void main(String[] args){\n \u00a0 \u00a0 \u00a0\/\/ \u4e0b\u9762\u7684\u8bed\u53e5\u5c06\u521b\u5efa\u4e00\u4e2aPuppy\u5bf9\u8c61\n \u00a0 \u00a0 \u00a0Puppy myPuppy = new Puppy( \"tommy\" );\n \u00a0 }\n}<\/code><\/pre>\n\n\n\n
          \u6784\u9020\u65b9\u6cd5<\/strong>\uff1a<\/h4>\n\n\n\n
            \n
          • \u521d\u59cb\u5316\u5bf9\u8c61\u5c5e\u6027<\/li>\n\n\n\n
          • \u4e0e\u7c7b\u540c\u540d\u7684\u65b9\u6cd5\uff0c\u521b\u5efa\u7c7b\u65f6\u81ea\u52a8\u8c03\u7528\u8be5\u65b9\u6cd5\u3002<\/li>\n\n\n\n
          • \u4e00\u4e2a\u7c7b\u81f3\u5c11\u6709\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u53ef\u6709\u591a\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u4f46\u53c2\u6570\u4e0d\u540c\u3002<\/li>\n<\/ul>\n\n\n\n
            \u7ee7\u627f\uff08Inheritance\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
              \n
            • \u4e00\u4e2a\u7c7b\u53ef\u4ee5\u7ee7\u627f\u53e6\u4e00\u4e2a\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/li>\n\n\n\n
            • \u793a\u4f8b\uff1apublic class Dog extends Animal { ... }<\/code><\/li>\n<\/ul>\n\n\n\n
              \u683c\u5f0f:<\/h4>\n\n\n\n
              class \u7236\u7c7b {
              }
              class \u5b50\u7c7b extends \u7236\u7c7b {
              }<\/code><\/pre>\n\n\n\n
              \u5173\u952e\u5b57<\/strong>\uff1a<\/h4>\n\n\n\n
              extends<\/code>\uff1a\u58f0\u660e\u7ee7\u627f\u54ea\u4e2a\u7236\u7c7b\u3002<\/p>\n\n\n\n
              super<\/code>:\u5f15\u7528\u7236\u7c7b\u5bf9\u8c61\uff0c\u8bbf\u95ee\u7236\u7c7b\u6210\u5458\u3002<\/p>\n\n\n\n
              this<\/code>:\u6307\u5411\u81ea\u5df1\u7684\u5f15\u7528\u3002<\/p>\n\n\n\n
              final<\/code>:\u58f0\u660e\u8be5\u7c7b\u65e0\u6cd5\u88ab\u7ee7\u627f\u3002<\/p>\n\n\n\n
              \u4f8b:<\/p>\n\n\n\n
              \/\/\u7236\u7c7b\nclass Animal {\n \u00a0 \u00a0void eat() {\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(\"animal : eat\");\n \u00a0  }\n}\n\/\/\u5b50\u7c7b \nclass Dog extends Animal {\n \u00a0 \u00a0void eat() {\/\/\u91cd\u5199\u65b9\u6cd5\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(\"dog : eat\");\n \u00a0  }\n \u00a0 \u00a0void eatTest() {\n \u00a0 \u00a0 \u00a0 \u00a0this.eat(); \u00a0 \/\/ this \u8c03\u7528\u81ea\u5df1\u7684\u65b9\u6cd5\n \u00a0 \u00a0 \u00a0 \u00a0super.eat(); \u00a0\/\/ super \u8c03\u7528\u7236\u7c7b\u65b9\u6cd5\n \u00a0  }\n}\n \npublic class Test {\n \u00a0 \u00a0public static void main(String[] args) {\n \u00a0 \u00a0 \u00a0 \u00a0Animal a = new Animal();\n \u00a0 \u00a0 \u00a0 \u00a0a.eat();\n \u00a0 \u00a0 \u00a0 \u00a0Dog d = new Dog();\n \u00a0 \u00a0 \u00a0 \u00a0d.eatTest();\n \u00a0  }\n}<\/code><\/pre>\n\n\n\n
              \u7ee7\u627f\u7279\u6027:<\/h4>\n\n\n\n
                \n
              • \u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\u540e\u53ef\u76f4\u63a5\u4f7f\u7528\u7236\u7c7b\u4e2d\u58f0\u660e\u7684\u975eprivate\u5c5e\u6027\u548c\u65b9\u6cd5<\/strong>\uff0c\u4e5f\u53ef\u4ee5\u91cd\u65b0\u58f0\u660e\u3002<\/li>\n\n\n\n
              • \u4e00\u4e2a\u5b50\u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b<\/li>\n\n\n\n
              • \u4e0d\u7ee7\u627f\u7236\u7c7b\u7684\u6784\u9020\u5668\uff0c\u5199\u5b50\u7c7b\u6784\u9020\u5668\u65f6\uff0c\u5982\u679c\u7236\u7c7b\u6784\u9020\u5668\u5e26\u53c2\u6570\uff0c\u9700\u8981\u7528super()<\/code>\u4f20\u5165\u53c2\u6570\uff0c\u82e5\u65e0\u53c2\u6570\u81ea\u52a8\u8c03\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
                \u5c01\u88c5\uff08Encapsulation\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
                  \n
                • \u5c06\u5bf9\u8c61\u7684\u72b6\u6001\uff08\u5b57\u6bb5\uff09\u79c1\u6709\u5316(private)\uff0c\u901a\u8fc7\u516c\u5171\u65b9\u6cd5(public)\u8bbf\u95ee\u3002<\/li>\n\n\n\n
                • \u793a\u4f8b\uff1aprivate String name;
                  public String getName() { return name; }<\/li>\n<\/ul>\n\n\n\n
                  \u591a\u6001\uff08Polymorphism\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
                    \n
                  • \u5bf9\u8c61\u53ef\u4ee5\u8868\u73b0\u4e3a\u591a\u79cd\u5f62\u6001\uff0c\u4e3b\u8981\u901a\u8fc7\u65b9\u6cd5\u91cd\u8f7d\u548c\u65b9\u6cd5\u91cd\u5199\u5b9e\u73b0\u3002<\/li>\n\n\n\n
                  • \u793a\u4f8b\uff1a\n
                      \n
                    • \u65b9\u6cd5\u91cd\u8f7d\uff1apublic int add(int a, int b) { ... }<\/code> \u548c public double add(double a, double b) { ... }<\/code><\/li>\n\n\n\n
                    • \u65b9\u6cd5\u91cd\u5199\uff1a@Override public void makeSound() { System.out.println(\"Meow\"); }<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
                      \u65b9\u6cd5\u91cd\u8f7d\uff08Method Overload\uff09<\/strong>\uff1a<\/h4>\n\n\n\n
                        \n
                      • \u540c\u4e00\u4e2a\u7c7b\u4e2d\u53ef\u4ee5\u6709\u591a\u4e2a\u540c\u540d\u7684\u65b9\u6cd5\uff0c\u4f46\u53c2\u6570\u4e0d\u540c\u3002<\/li>\n\n\n\n
                      • \u793a\u4f8b\uff1a<\/li>\n<\/ul>\n\n\n\n
                        public class MathUtils {
                            public int add(int a, int b) {
                                return a + b;
                            }
                        \u200b
                            public double add(double a, double b) {
                                return a + b;
                            }
                        }<\/code><\/pre>\n\n\n\n
                        \u65b9\u6cd5\u91cd\u5199\uff08Method Override\uff09:<\/h4>\n\n\n\n
                          \n
                        • \u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5<\/li>\n\n\n\n
                        • \u91cd\u5199\u7684\u65b9\u6cd5\u53c2\u6570\u5217\u8868\u9700\u76f8\u540c<\/li>\n\n\n\n
                        • \u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u65b9\u6cd5\u4f4e<\/li>\n\n\n\n
                        • final<\/code>\uff0cstatic<\/code>\u548cprivate<\/code>\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199<\/li>\n\n\n\n
                        • \u901a\u8fc7@Override<\/code>\u5f3a\u5236\u68c0\u67e5\u91cd\u5199\u662f\u5426\u6b63\u786e\u3002<\/li>\n<\/ul>\n\n\n\n
                          \u62bd\u8c61\uff08Abstraction\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
                            \n
                          • \u4f7f\u7528\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u6765\u5b9a\u4e49\u5fc5\u987b\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c\u4e0d\u63d0\u4f9b\u5177\u4f53\u5b9e\u73b0\u3002<\/li>\n\n\n\n
                          • \u62bd\u8c61\u7c7b\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\uff0c\u53ea\u80fd\u88ab\u7ee7\u627f\uff0c\u53ea\u6709\u62bd\u8c61\u7c7b\u7684\u975e\u62bd\u8c61\u5b50\u7c7b\u53ef\u4ee5\u521b\u5efa\u5bf9\u8c61\u3002<\/li>\n\n\n\n
                          • \u62bd\u8c61\u7c7b\u4e2d\u4e0d\u4e00\u5b9a\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\uff0c\u4f46\u662f\u6709\u62bd\u8c61\u65b9\u6cd5\u7684\u7c7b\u5fc5\u5b9a\u662f\u62bd\u8c61\u7c7b\u3002<\/li>\n\n\n\n
                          • \u62bd\u8c61\u7c7b\u4e2d\u7684\u62bd\u8c61\u65b9\u6cd5\u53ea\u662f\u58f0\u660e\uff0c\u4e0d\u5305\u542b\u65b9\u6cd5\u4f53\u3002<\/li>\n\n\n\n
                          • \u6784\u9020\u65b9\u6cd5\uff0c\u7c7b\u65b9\u6cd5\uff08\u7528 static \u4fee\u9970\u7684\u65b9\u6cd5\uff09\u4e0d\u80fd\u58f0\u660e\u4e3a\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                          • \u62bd\u8c61\u7c7b\u7684\u5b50\u7c7b\u5fc5\u987b\u7ed9\u51fa\u62bd\u8c61\u7c7b\u4e2d\u7684\u62bd\u8c61\u65b9\u6cd5\u7684\u5177\u4f53\u5b9e\u73b0\uff0c\u9664\u975e\u8be5\u5b50\u7c7b\u4e5f\u662f\u62bd\u8c61\u7c7b\u3002<\/li>\n\n\n\n
                          • \u793a\u4f8b\uff1a\n
                              \n
                            • \u62bd\u8c61\u7c7b\uff1apublic abstract class Shape { abstract void draw(); }<\/code><\/li>\n\n\n\n
                            • \u63a5\u53e3\uff1apublic interface Animal { void eat(); }<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
                              \u63a5\u53e3\uff08Interface\uff09<\/strong>\uff1a<\/h3>\n\n\n\n
                              \u5b9a\u4e49\u7c7b\u5fc5\u987b\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c\u652f\u6301\u591a\u91cd\u7ee7\u627f\u3002<\/p>\n\n\n\n
                              \u6ce8\uff1a\u63a5\u53e3\u7c7b\u4f3c\u62bd\u8c61\u7c7b\uff0c\u4f46\u4e0e\u62bd\u8c61\u7c7b\u4e0d\u540c<\/p>\n\n\n\n
                                \n
                              1. \u63a5\u53e3\u4e2d\u6bcf\u4e00\u4e2a\u65b9\u6cd5\u4e5f\u662f\u9690\u5f0f\u62bd\u8c61\u7684,\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u4f1a\u88ab\u9690\u5f0f\u7684\u6307\u5b9a\u4e3a public abstract\u3002<\/li>\n\n\n\n
                              2. \u63a5\u53e3\u4e2d\u53ef\u4ee5\u542b\u6709\u53d8\u91cf\uff0c\u4f46\u662f\u63a5\u53e3\u4e2d\u7684\u53d8\u91cf\u4f1a\u88ab\u9690\u5f0f\u7684\u6307\u5b9a\u4e3a public static final \u53d8\u91cf<\/li>\n\n\n\n
                              3. \u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u662f\u4e0d\u80fd\u5728\u63a5\u53e3\u4e2d\u5b9e\u73b0\u7684\uff0c\u53ea\u80fd\u7531\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u6765\u5b9e\u73b0\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                              4. \u62bd\u8c61\u7c7b\u4e2d\u7684\u65b9\u6cd5\u53ef\u4ee5\u6709\u65b9\u6cd5\u4f53\uff0c\u5c31\u662f\u80fd\u5b9e\u73b0\u65b9\u6cd5\u7684\u5177\u4f53\u529f\u80fd\uff0c\u4f46\u662f\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u4e0d\u884c\u3002<\/li>\n\n\n\n
                              5. \u62bd\u8c61\u7c7b\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u53ef\u4ee5\u662f\u5404\u79cd\u7c7b\u578b\u7684\uff0c\u800c\u63a5\u53e3\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u53ea\u80fd\u662f public static final \u7c7b\u578b\u7684<\/strong>\u3002<\/li>\n\n\n\n
                              6. \u63a5\u53e3\u4e2d\u4e0d\u80fd\u542b\u6709\u9759\u6001\u4ee3\u7801\u5757\u4ee5\u53ca\u9759\u6001\u65b9\u6cd5(\u7528 static \u4fee\u9970\u7684\u65b9\u6cd5)\uff0c\u800c\u62bd\u8c61\u7c7b\u662f\u53ef\u4ee5\u6709\u9759\u6001\u4ee3\u7801\u5757\u548c\u9759\u6001\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                              7. \u4e00\u4e2a\u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff0c\u800c\u4e00\u4e2a\u7c7b\u5374\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3<\/strong>\u3002<\/li>\n<\/ol>\n\n\n\n
                                \u63a5\u53e3\u7684\u58f0\u660e\uff1a<\/h4>\n\n\n\n
                                interface<\/code>\u5173\u952e\u5b57\uff1a<\/p>\n\n\n\n
                                interface Animal {
                                   public void eat();
                                   public void behavior();
                                }<\/code><\/pre>\n\n\n\n
                                \u63a5\u53e3\u7684\u5b9e\u73b0\uff1a<\/h4>\n\n\n\n
                                implements<\/code>\u5173\u952e\u5b57\uff1a<\/p>\n\n\n\n
                                public class MammalInt implements Animal{\n \u00a0 \/\/\u5b9e\u73b0\u63a5\u53e3\u7684\u65b9\u6cd5\n \u00a0 public void eat(){\n \u00a0 \u00a0 \u00a0System.out.println(\"Mammal eats\");\n \u00a0 }\n \n \u00a0 public void behavior(){\n \u00a0 \u00a0 \u00a0System.out.println(\"Mammal behavior\");\n \u00a0 } \n \u00a0 \/\/\u58f0\u660e\u81ea\u5df1\u7684\u65b9\u6cd5\n \u00a0 \u00a0public int noOfLegs(){\n \u00a0 \u00a0 \u00a0return 0;\n \u00a0 }\n \u00a0 public static void main(String args[]){\n \u00a0 \u00a0 \u00a0MammalInt m = new MammalInt();\n \u00a0 \u00a0 \u00a0m.eat();\n \u00a0 \u00a0 \u00a0m.travel();\n \u00a0 }\n}<\/code><\/pre>\n\n\n\n
                                \u91cd\u5199\u63a5\u53e3\u4e2d\u58f0\u660e\u7684\u65b9\u6cd5\u65f6\uff0c\u6ce8\u610f\uff1a<\/p>\n\n\n\n
                                  \n
                                • \u7c7b\u5728\u5b9e\u73b0\u63a5\u53e3\u7684\u65b9\u6cd5\u65f6\uff0c\u4e0d\u80fd\u629b\u51fa\u5f3a\u5236\u6027\u5f02\u5e38\uff0c\u53ea\u80fd\u5728\u63a5\u53e3\u4e2d\uff0c\u6216\u8005\u7ee7\u627f\u63a5\u53e3\u7684\u62bd\u8c61\u7c7b\u4e2d\u629b\u51fa\u8be5\u5f3a\u5236\u6027\u5f02\u5e38\u3002<\/li>\n\n\n\n
                                • \u7c7b\u5728\u91cd\u5199\u65b9\u6cd5\u65f6\u8981\u4fdd\u6301\u4e00\u81f4\u7684\u65b9\u6cd5\u540d\uff0c\u5e76\u4e14\u5e94\u8be5\u4fdd\u6301\u76f8\u540c\u6216\u8005\u76f8\u517c\u5bb9\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002<\/li>\n\n\n\n
                                • \u5982\u679c\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u662f\u62bd\u8c61\u7c7b\uff0c\u90a3\u4e48\u5c31\u6ca1\u5fc5\u8981\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n
                                  \u63a5\u53e3\u7684\u7ee7\u627f\uff1a<\/h4>\n\n\n\n
                                  \u4e00\u4e2a\u63a5\u53e3\u80fd\u7ee7\u627f\u53e6\u4e00\u4e2a\u63a5\u53e3\uff0c\u548c\u7c7b\u4e4b\u95f4\u7684\u7ee7\u627f\u65b9\u5f0f\u6bd4\u8f83\u76f8\u4f3c\u3002\u63a5\u53e3\u7684\u7ee7\u627f\u4f7f\u7528extends<\/code>\u5173\u952e\u5b57\uff0c\u5b50\u63a5\u53e3\u7ee7\u627f\u7236\u63a5\u53e3\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n
                                  \u7c7b\u7684\u591a\u7ee7\u627f\u662f\u4e0d\u5408\u6cd5\uff0c\u4f46\u63a5\u53e3\u5141\u8bb8\u591a\u7ee7\u627f\u3002<\/p>\n\n\n\n
                                  \u4e00\u4e2a\u7c7b\u53ef\u4ee5\u7ee7\u627f\u4e00\u4e2a\u666e\u901a\u7236\u7c7b\u6216\u62bd\u8c61\u7c7b\uff0c\u53ef\u4ee5\u7ee7\u627f\u591a\u4e2a\u63a5\u53e3\uff1b\u4e00\u4e2a\u63a5\u53e3\u53ef\u4ee5\u7ee7\u627f\u591a\u4e2a\u63a5\u53e3<\/strong><\/p>\n\n\n\n
                                  *\u5f02\u5e38\u5904\u7406<\/h2>\n\n\n\n
                                  \u5206\u7c7b\uff1a<\/h3>\n\n\n\n
                                  \u68c0\u67e5\u6027\u5f02\u5e38\uff1a<\/h4>\n\n\n\n
                                  \u7f16\u8bd1\u65f6\u5f3a\u5236\u7a0b\u5e8f\u5458\u5904\u7406\u3002\u901a\u5e38\u7528try-catch<\/code>\u5757\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\uff0c\u6216\u7528throws<\/code>\u58f0\u660e\u53ef\u80fd\u629b\u51fa\u7684\u5f02\u5e38\u3002<\/p>\n\n\n\n
                                  \u8fd0\u884c\u65f6\u5f02\u5e38\uff1a<\/h4>\n\n\n\n
                                  \u7f16\u8bd1\u65f6\u4e0d\u8981\u6c42\u5fc5\u987b\u5904\u7406\u3002<\/p>\n\n\n\n
                                  \u9519\u8bef\uff1a<\/h4>\n\n\n\n
                                  JVM\u6216\u7cfb\u7edf\u5e95\u5c42\u53d1\u751f\u7684\u4e25\u91cd\u6545\u969c\uff0c\u7a0b\u5e8f\u65e0\u6cd5\u901a\u8fc7\u4ee3\u7801\u4fee\u590d\u8fd9\u7c7b\u95ee\u9898<\/p>\n\n\n\n
                                  \u5e38\u89c1\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
                                    \n
                                  • OutOfMemoryError<\/code>\uff08\u5185\u5b58\u6ea2\u51fa\uff09<\/li>\n\n\n\n
                                  • StackOverflowError<\/code>\uff08\u6808\u6ea2\u51fa\uff0c\u6bd4\u5982\u9012\u5f52\u592a\u6df1\uff09<\/li>\n\n\n\n
                                  • NoClassDefFoundError<\/code>\uff08\u7c7b\u627e\u4e0d\u5230\uff09<\/li>\n<\/ul>\n\n\n\n
                                    \u5173\u952e\u5b57\uff1a<\/h3>\n\n\n\n
                                    \u5173\u952e\u5b57<\/th>\u4f5c\u7528<\/th>\u4f7f\u7528\u4f4d\u7f6e<\/th><\/tr><\/thead>
                                    try<\/code><\/td>\u5305\u88f9\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801<\/td>\u65b9\u6cd5\u4f53\u5185<\/td><\/tr>
                                    catch<\/code><\/td>\u6355\u83b7\u5e76\u5904\u7406\u7279\u5b9a\u7c7b\u578b\u7684\u5f02\u5e38<\/td>\u7d27\u8ddftry\u5757<\/td><\/tr>
                                    finally<\/code><\/td>\u65e0\u8bba\u662f\u5426\u5f02\u5e38\u90fd\u6267\u884c\u7684\u4ee3\u7801\u5757\uff08\u8d44\u6e90\u6e05\u7406\uff09<\/td>\u7d27\u8ddfcatch\u6216try<\/td><\/tr>
                                    throw<\/code><\/td>\u624b\u52a8\u629b\u51fa\u4e00\u4e2a\u5f02\u5e38\u5bf9\u8c61<\/td>\u65b9\u6cd5\u4f53\u5185<\/td><\/tr>
                                    throws<\/code><\/td>\u58f0\u660e\u65b9\u6cd5\u53ef\u80fd\u629b\u51fa\u7684\u5f02\u5e38\uff0c\u4ea4\u7ed9\u8c03\u7528\u8005\u5904\u7406<\/td>\u65b9\u6cd5\u7b7e\u540d<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                                    try-catch-finally:<\/h4>\n\n\n\n
                                    try {\n \u00a0 \u00a0\/\/ \u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (\u5f02\u5e38\u7c7b\u578b1 e) {\n \u00a0 \u00a0\/\/ \u5904\u7406\u5f02\u5e38\u7c7b\u578b1\n} catch (\u5f02\u5e38\u7c7b\u578b2 e) {\n \u00a0 \u00a0\/\/ \u5904\u7406\u5f02\u5e38\u7c7b\u578b2\n} finally {\n \u00a0 \u00a0\/\/ \u65e0\u8bba\u662f\u5426\u5f02\u5e38\uff0c\u90fd\u4f1a\u6267\u884c\u7684\u4ee3\u7801\uff08\u901a\u5e38\u7528\u4e8e\u91ca\u653e\u8d44\u6e90\uff09\n}<\/code><\/pre>\n\n\n\n
                                    throw\/throws:<\/h4>\n\n\n\n
                                    throw:\u624b\u52a8\u629b\u51fa\u5f02\u5e38<\/p>\n\n\n\n
                                    public void withdraw(double amount) {
                                        if (amount <= 0) {
                                            throw new IllegalArgumentException(\"\u53d6\u6b3e\u91d1\u989d\u5fc5\u987b\u5927\u4e8e0\");
                                        }
                                    }<\/code><\/pre>\n\n\n\n
                                    throws:\u58f0\u660e\u5f02\u5e38(\u8868\u660e\u8be5\u65b9\u6cd5\u4f1a\u51fa\u73b0xx\u5f02\u5e38),\u4ea4\u7ed9\u8c03\u7528\u8005\u5904\u7406<\/p>\n\n\n\n
                                    public void readFile(String path) throws IOException {\n \u00a0 \u00a0FileReader reader = new FileReader(path);\n \u00a0 \u00a0\/\/ \u4e0d\u5728\u8fd9\u91cc\u5904\u7406\u5f02\u5e38\uff0c\u8ba9\u8c03\u7528\u8005\u5904\u7406\n}<\/code><\/pre>\n\n\n\n
                                    \u81ea\u5b9a\u4e49\u5f02\u5e38\uff1a<\/h3>\n\n\n\n
                                      \n
                                    1. \u5b9a\u4e49\u4e00\u4e2a\u5f02\u5e38\u7c7b\u4e14\u7ee7\u627fException\u7c7b\u6216RuntimeException\u7c7b<\/li>\n\n\n\n
                                    2. \u5199\u4e24\u4e2a\u6784\u9020\u5668\uff0c\u4e00\u4e2a\u65e0\u53c2\uff0c\u4e00\u4e2a\u6709\u53c2\u3002<\/li>\n<\/ol>\n\n\n\n
                                      public class YourExceptionName extends Exception \/* \u6216 RuntimeException *\/ {\n \u00a0 \u00a0\n \u00a0 \u00a0\/\/ 1. \u65e0\u53c2\u6784\u9020\n \u00a0 \u00a0public YourExceptionName() { \n \u00a0 \u00a0 \u00a0 \u00a0super(); \n \u00a0  }\n \u00a0 \u00a0\n \u00a0 \u00a0\/\/ 2. \u5e26\u6d88\u606f\u6784\u9020\uff08\u5fc5\u5199\uff0c\u6700\u5e38\u7528\uff09\n \u00a0 \u00a0public YourExceptionName(String message) { \n \u00a0 \u00a0 \u00a0 \u00a0super(message); \n \u00a0  }\n}<\/code><\/pre>\n\n\n\n
                                      *\u591a\u7ebf\u7a0b<\/h2>\n\n\n\n
                                      \u5e76\u53d1\uff1a\u591a\u4e2a\u6307\u4ee4\u5728CPU\u4e0a\u4ea4\u66ff\u6267\u884c<\/p>\n\n\n\n
                                      \u5e76\u884c\uff1a\u591a\u4e2a\u6307\u4ee4\u5728CPU\u4e0a\u540c\u65f6\u6267\u884c<\/p>\n\n\n\n
                                      \u7ebf\u7a0b\u7684\u751f\u547d\u5468\u671f\uff1a<\/h3>\n\n\n\n
                                        \n
                                      • \u65b0\u5efa\u72b6\u6001:\u4f7f\u7528 new<\/strong> \u5173\u952e\u5b57\u548c Thread<\/strong> \u7c7b\u6216\u5176\u5b50\u7c7b\u5efa\u7acb\u4e00\u4e2a\u7ebf\u7a0b\u5bf9\u8c61\u540e\uff0c\u8be5\u7ebf\u7a0b\u5bf9\u8c61\u5c31\u5904\u4e8e\u65b0\u5efa\u72b6\u6001\u3002\u5b83\u4fdd\u6301\u8fd9\u4e2a\u72b6\u6001\u76f4\u5230\u7a0b\u5e8f start()<\/strong> \u8fd9\u4e2a\u7ebf\u7a0b\u3002<\/li>\n\n\n\n
                                      • \u5c31\u7eea\u72b6\u6001:\u5f53\u7ebf\u7a0b\u5bf9\u8c61\u8c03\u7528\u4e86start()\u65b9\u6cd5\u4e4b\u540e\uff0c\u8be5\u7ebf\u7a0b\u5c31\u8fdb\u5165\u5c31\u7eea\u72b6\u6001\u3002\u5c31\u7eea\u72b6\u6001\u7684\u7ebf\u7a0b\u5904\u4e8e\u5c31\u7eea\u961f\u5217\u4e2d\uff0c\u8981\u7b49\u5f85JVM\u91cc\u7ebf\u7a0b\u8c03\u5ea6\u5668\u7684\u8c03\u5ea6\u3002<\/li>\n\n\n\n
                                      • \u8fd0\u884c\u72b6\u6001:\u5982\u679c\u5c31\u7eea\u72b6\u6001\u7684\u7ebf\u7a0b\u83b7\u53d6 CPU \u8d44\u6e90\uff0c\u5c31\u53ef\u4ee5\u6267\u884c run()<\/strong>\uff0c\u6b64\u65f6\u7ebf\u7a0b\u4fbf\u5904\u4e8e\u8fd0\u884c\u72b6\u6001\u3002\u5904\u4e8e\u8fd0\u884c\u72b6\u6001\u7684\u7ebf\u7a0b\u6700\u4e3a\u590d\u6742\uff0c\u5b83\u53ef\u4ee5\u53d8\u4e3a\u963b\u585e\u72b6\u6001\u3001\u5c31\u7eea\u72b6\u6001\u548c\u6b7b\u4ea1\u72b6\u6001\u3002<\/li>\n\n\n\n
                                      • \u963b\u585e\u72b6\u6001:\u5982\u679c\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u4e86sleep\uff08\u7761\u7720\uff09\u3001suspend\uff08\u6302\u8d77\uff09\u7b49\u65b9\u6cd5\uff0c\u5931\u53bb\u6240\u5360\u7528\u8d44\u6e90\u4e4b\u540e\uff0c\u8be5\u7ebf\u7a0b\u5c31\u4ece\u8fd0\u884c\u72b6\u6001\u8fdb\u5165\u963b\u585e\u72b6\u6001\u3002\u5728\u7761\u7720\u65f6\u95f4\u5df2\u5230\u6216\u83b7\u5f97\u8bbe\u5907\u8d44\u6e90\u540e\u53ef\u4ee5\u91cd\u65b0\u8fdb\u5165\u5c31\u7eea\u72b6\u6001\u3002\u53ef\u4ee5\u5206\u4e3a\u4e09\u79cd\uff1a\n
                                          \n
                                        • \u7b49\u5f85\u963b\u585e\uff1a\u8fd0\u884c\u72b6\u6001\u4e2d\u7684\u7ebf\u7a0b\u6267\u884c wait() \u65b9\u6cd5\uff0c\u4f7f\u7ebf\u7a0b\u8fdb\u5165\u5230\u7b49\u5f85\u963b\u585e\u72b6\u6001\u3002<\/li>\n\n\n\n
                                        • \u540c\u6b65\u963b\u585e\uff1a\u7ebf\u7a0b\u5728\u83b7\u53d6 synchronized \u540c\u6b65\u9501\u5931\u8d25(\u56e0\u4e3a\u540c\u6b65\u9501\u88ab\u5176\u4ed6\u7ebf\u7a0b\u5360\u7528)\u3002<\/li>\n\n\n\n
                                        • \u5176\u4ed6\u963b\u585e\uff1a\u901a\u8fc7\u8c03\u7528\u7ebf\u7a0b\u7684 sleep() \u6216 join() \u53d1\u51fa\u4e86 I\/O \u8bf7\u6c42\u65f6\uff0c\u7ebf\u7a0b\u5c31\u4f1a\u8fdb\u5165\u5230\u963b\u585e\u72b6\u6001\u3002\u5f53sleep() \u72b6\u6001\u8d85\u65f6\uff0cjoin() \u7b49\u5f85\u7ebf\u7a0b\u7ec8\u6b62\u6216\u8d85\u65f6\uff0c\u6216\u8005 I\/O \u5904\u7406\u5b8c\u6bd5\uff0c\u7ebf\u7a0b\u91cd\u65b0\u8f6c\u5165\u5c31\u7eea\u72b6\u6001\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                                        • \u6b7b\u4ea1\u72b6\u6001:\u4e00\u4e2a\u8fd0\u884c\u72b6\u6001\u7684\u7ebf\u7a0b\u5b8c\u6210\u4efb\u52a1\u6216\u8005\u5176\u4ed6\u7ec8\u6b62\u6761\u4ef6\u53d1\u751f\u65f6\uff0c\u8be5\u7ebf\u7a0b\u5c31\u5207\u6362\u5230\u7ec8\u6b62\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n
                                          \u72b6\u6001<\/th>\u8bf4\u660e<\/th>\u8fdb\u5165\u6761\u4ef6<\/th><\/tr><\/thead>
                                          NEW<\/td>\u65b0\u5efa\uff0c\u8fd8\u6ca1 start<\/td>new Thread()<\/code> \u4e4b\u540e<\/td><\/tr>
                                          RUNNABLE<\/td>\u53ef\u8fd0\u884c\uff08\u5c31\u7eea\u6216\u6b63\u5728\u8fd0\u884c\uff09<\/td>\u8c03\u4e86 start()<\/code><\/td><\/tr>
                                          BLOCKED<\/td>\u963b\u585e\uff0c\u7b49\u9501<\/td>\u7ade\u4e89 synchronized<\/code> \u9501\u5931\u8d25<\/td><\/tr>
                                          WAITING<\/td>\u65e0\u9650\u671f\u7b49\u5f85<\/td>\u8c03\u4e86 wait()<\/code> \/ join()<\/code> \/ park()<\/code><\/td><\/tr>
                                          TIMED_WAITING<\/td>\u9650\u65f6\u7b49\u5f85<\/td>\u8c03\u4e86 sleep(ms)<\/code> \/ wait(timeout)<\/code> \/ join(ms)<\/code><\/td><\/tr>
                                          TERMINATED<\/td>\u7ec8\u6b62<\/td>run()<\/code> \u6267\u884c\u5b8c\u6216\u5f02\u5e38\u9000\u51fa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                                          \u521b\u5efa\u7ebf\u7a0b\u7684\u4e09\u79cd\u65b9\u5f0f\uff1a<\/h3>\n\n\n\n
                                          \u7ed9\u7ebf\u7a0b\u8bbe\u7f6e\u540d\u5b57\uff1asetName()<\/code>\uff1b\u83b7\u53d6\u540d\u5b57\uff1agetName()<\/code>;\u83b7\u53d6\u5f53\u524d\u7ebf\u7a0b\u7684\u5bf9\u8c61\uff1aThread.currentThread()<\/code><\/p>\n\n\n\n
                                          *1.\u7ee7\u627fThread\u7c7b<\/h4>\n\n\n\n
                                          class MyThread extends Thread {\/\/1.\u521b\u5efa\u4e00\u4e2a\u7c7b\uff08\u7ebf\u7a0b\uff09\u7ee7\u627fThread\u7c7b\n \u00a0 \u00a0@Override\n \u00a0 \u00a0public void run() {\/\/2.\u91cd\u5199run\u65b9\u6cd5\uff08\u8be5\u7ebf\u7a0b\u9700\u8981\u6267\u884c\u7684\u6307\u4ee4\uff09\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(\"\u7ebf\u7a0b\u6267\u884c\u4e2d\uff1a\" + Thread.currentThread().getName());\/\/\u7ee7\u627f\u4e86Thread\u7c7b\uff0c\u53ef\u76f4\u63a5\u7528getName()\n \u00a0  }\n}\n\/\/ \u4f7f\u7528\nMyThread t = new MyThread();\/\/3.\u521b\u5efa\u5bf9\u8c61\nt.start();\/\/4.\u6267\u884crun\u65b9\u6cd5<\/code><\/pre>\n\n\n\n
                                          *2.\u5b9e\u73b0Runnable\u63a5\u53e3<\/h4>\n\n\n\n
                                          class MyRunnable implements Runnable {\/\/1.\u521b\u5efa\u7c7b\uff08\u7ebf\u7a0b\uff09\uff0c\u5b9e\u73b0Runnable\u63a5\u53e3\n \u00a0 \u00a0@Override\n \u00a0 \u00a0public void run() {\/\/2.\u91cd\u5199run\u65b9\u6cd5\n \u00a0 \u00a0 \u00a0 \u00a0System.out.println(\"\u7ebf\u7a0b\u6267\u884c\u4e2d\uff1a\" + Thread.currentThread().getName());\n \u00a0  }\n}\n\/\/ \u4f7f\u7528\nMyRunnable mr = new MyRunnable();\/\/\u521b\u5efa\u81ea\u5df1\u7c7b\u7684\u5bf9\u8c61\nThread t = new Thread(mr);\/\/\u521b\u5efa\u7ebf\u7a0b\uff0c\u5e76\u4f20\u5165\u5bf9\u8c61\nt.start();\/\/\u542f\u52a8\u7ebf\u7a0b\n\u200b<\/code><\/pre>\n\n\n\n
                                          3.\u5b9e\u73b0callable\u63a5\u53e3\uff08\u7565\uff09<\/h4>\n\n\n\n
                                            \n
                                            1. \u521b\u5efa Callable \u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\uff0c\u5e76\u5b9e\u73b0 call() \u65b9\u6cd5\uff0c\u8be5 call() \u65b9\u6cd5\u5c06\u4f5c\u4e3a\u7ebf\u7a0b\u6267\u884c\u4f53\uff0c\u5e76\u4e14\u6709\u8fd4\u56de\u503c\u3002<\/li><\/ol>
                                              1. \u521b\u5efa Callable \u5b9e\u73b0\u7c7b\u7684\u5b9e\u4f8b\uff0c\u4f7f\u7528 FutureTask \u7c7b\u6765\u5305\u88c5 Callable \u5bf9\u8c61\uff0c\u8be5 FutureTask \u5bf9\u8c61\u5c01\u88c5\u4e86\u8be5 Callable \u5bf9\u8c61\u7684 call() \u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u3002<\/li><\/ol>
                                                1. \u4f7f\u7528 FutureTask \u5bf9\u8c61\u4f5c\u4e3a Thread \u5bf9\u8c61\u7684 target \u521b\u5efa\u5e76\u542f\u52a8\u65b0\u7ebf\u7a0b\u3002<\/li><\/ol>\n
                                                    \n
                                                  1. \u8c03\u7528 FutureTask \u5bf9\u8c61\u7684 get() \u65b9\u6cd5\u6765\u83b7\u5f97\u5b50\u7ebf\u7a0b\u6267\u884c\u7ed3\u675f\u540e\u7684\u8fd4\u56de\u503c\u3002<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n
                                                    class MyCallable implements Callable<Integer> {\/\/<Integer>\u6cdb\u578b\n \u00a0 \u00a0@Override\n \u00a0 \u00a0public Integer call() throws Exception {\n \u00a0 \u00a0 \u00a0 \u00a0return 42;\n \u00a0  }\n}\n\/\/ \u4f7f\u7528\nFutureTask<Integer> task = new FutureTask<>(new MyCallable());\nThread t = new Thread(task);\nt.start();\nInteger result = task.get(); \/\/ \u83b7\u53d6\u8fd4\u56de\u503c<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
                                                    java \u4f8b\uff1a \u7c7b\uff1a \u4e00\u4e2a\u6587\u4ef6\u53ef\u4ee5\u6709\u591a\u4e2a\u7c7b\uff0c\u4f46\u53ea\u80fd\u6709\u4e00\u4e2a\u4e3b\u7c7b\uff08\u5373Public\u7c7b\uff09\u3002\u7c7b\u91cc\u6709\u5c5e\u6027\uff0c\u6709\u65b9\u6cd5\u3002 \u5b9a\u4e49\u7c7b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-77","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/posts\/77","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/comments?post=77"}],"version-history":[{"count":8,"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/posts\/77\/revisions"}],"predecessor-version":[{"id":90,"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/posts\/77\/revisions\/90"}],"wp:attachment":[{"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/media?parent=77"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/categories?post=77"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhwj326.top\/index.php\/wp-json\/wp\/v2\/tags?post=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}