{"id":117,"date":"2015-04-01T11:48:29","date_gmt":"2015-04-01T03:48:29","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=117"},"modified":"2026-08-18T12:09:26","modified_gmt":"2026-08-18T04:09:26","slug":"java%e5%8c%85%e8%a3%85%e7%b1%bb%e3%80%81%e6%8b%86%e7%ae%b1%e5%92%8c%e8%a3%85%e7%ae%b1%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=117","title":{"rendered":"Java\u5305\u88c5\u7c7b\u3001\u62c6\u7bb1\u548c\u88c5\u7bb1\u8be6\u89e3"},"content":{"rendered":"
\n

Java \u662f\u9762\u5411\u5bf9\u8c61\u8bed\u8a00\uff0c\u4f46\u516b\u79cd\u57fa\u672c\u7c7b\u578b\u5e76\u4e0d\u5e26\u5bf9\u8c61\u7279\u6027\uff1a\u6ca1\u6709\u5c5e\u6027\u3001\u4e5f\u4e0d\u80fd\u8c03\u65b9\u6cd5\u3002\u4fdd\u7559\u5b83\u4eec\u662f\u4e3a\u4e86\u7b26\u5408\u4e60\u60ef\uff0c\u5e76\u8ba9\u5e38\u89c4\u6570\u503c\u8fd0\u7b97\u66f4\u7b80\u5355\u9ad8\u6548\u3002<\/p>\n

\u5f15\u7528\u7c7b\u578b\u90fd\u7ee7\u627f\u4e86 Object\uff0c\u8f6c\u6210\u5b57\u7b26\u4e32\u53ea\u8981\u8c03 toString()<\/code>\uff1b\u57fa\u672c\u7c7b\u578b\u5c31\u9ebb\u70e6\u5f97\u591a\u3002\u4e3a\u6b64 Java \u7ed9\u6bcf\u79cd\u57fa\u672c\u7c7b\u578b\u914d\u4e86\u4e00\u4e2a\u7c7b\uff0c\u53eb\u505a\u5305\u88c5\u7c7b<\/strong>\uff08Wrapper Classes\uff09\uff0c\u4e5f\u6709\u6559\u6750\u79f0\u4e3a\u5916\u8986\u7c7b\u6216\u6570\u636e\u7c7b\u578b\u7c7b\u3002<\/p>\n

<\/p>\n

\u6bcf\u4e2a\u5305\u88c5\u7c7b\u5bf9\u8c61\u5c01\u88c5\u4e00\u4e2a\u5bf9\u5e94\u7684\u57fa\u672c\u7c7b\u578b\u503c\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e9b\u6709\u7528\u65b9\u6cd5\u3002\u5bf9\u8c61\u4e00\u7ecf\u521b\u5efa\uff0c\u6240\u5c01\u88c5\u7684\u503c\u4e0d\u53ef\u6539\u53d8\uff08\u4e0d\u53ef\u53d8\uff09\u3002\u57fa\u672c\u7c7b\u578b\u8f6c\u5230\u5305\u88c5\u7c7b\u53eb\u88c5\u7bb1<\/strong>\uff0c\u53cd\u8fc7\u6765\u53eb\u62c6\u7bb1<\/strong>\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u57fa\u672c\u7c7b\u578b<\/th>\n\u5305\u88c5\u7c7b<\/th>\n\u62c6\u7bb1\u65b9\u6cd5<\/th>\n<\/tr>\n<\/thead>\n
byte<\/td>\nByte<\/td>\nbyteValue()<\/td>\n<\/tr>\n
short<\/td>\nShort<\/td>\nshortValue()<\/td>\n<\/tr>\n
int<\/td>\nInteger<\/td>\nintValue()<\/td>\n<\/tr>\n
long<\/td>\nLong<\/td>\nlongValue()<\/td>\n<\/tr>\n
float<\/td>\nFloat<\/td>\nfloatValue()<\/td>\n<\/tr>\n
double<\/td>\nDouble<\/td>\ndoubleValue()<\/td>\n<\/tr>\n
char<\/td>\nCharacter<\/td>\ncharValue()<\/td>\n<\/tr>\n
boolean<\/td>\nBoolean<\/td>\nbooleanValue()<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e00\u3001\u624b\u52a8\u88c5\u7bb1\u4e0e\u62c6\u7bb1<\/h2>\n

\u516b\u4e2a\u5305\u88c5\u7c7b\u7528\u6cd5\u76f8\u8fd1\u3002\u4ee5 Integer \u4e3a\u4f8b\uff1a\u5386\u53f2\u4e0a\u53ef\u7528\u6784\u9020\u65b9\u6cd5\u628a int \u88c5\u7bb1\uff0c\u7528 intValue()<\/code> \u62c6\u7bb1\u3002Java 9 \u8d77\u8fd9\u4e9b\u6784\u9020\u65b9\u6cd5\u5df2\u8fc7\u65f6\uff0c\u63a8\u8350 Integer.valueOf(m)<\/code>\u3002<\/p>\n

public class Demo {\n    public static void main(String[] args) {\n        int m = 500;\n        Integer obj = Integer.valueOf(m);  \/\/ \u624b\u52a8\u88c5\u7bb1\n        int n = obj.intValue();            \/\/ \u624b\u52a8\u62c6\u7bb1\n        System.out.println(\"n = \" + n);\n\n        Integer obj1 = Integer.valueOf(500);\n        System.out.println(\"obj \u7b49\u4ef7\u4e8e obj1\uff1f\" + obj.equals(obj1));\n    }\n}<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\uff1an = 500\uff1bobj \u7b49\u4ef7\u4e8e obj1\uff1ftrue\u3002\u6bd4\u8f83\u5305\u88c5\u5bf9\u8c61\u7684\u503c\u8981\u7528 equals<\/code>\uff0c\u4e0d\u8981\u4f9d\u8d56 ==<\/code>\uff08\u7f13\u5b58\u8303\u56f4\u5916\u4f1a\u662f\u4e0d\u540c\u5bf9\u8c61\uff09\u3002<\/p>\n
\u4e8c\u3001\u5b57\u7b26\u4e32\u4e0e\u6574\u6570\u4e92\u8f6c<\/h2>\n
Integer \u6709\u9759\u6001\u65b9\u6cd5 parseInt(String s, int radix)<\/code>\uff1as \u662f\u8981\u8f6c\u6362\u7684\u5b57\u7b26\u4e32\uff0cradix \u662f\u8fdb\u5236\uff0c\u53ef\u7701\u7565\uff0c\u9ed8\u8ba4\u5341\u8fdb\u5236\u3002\u5b57\u7b26\u4e32\u5fc5\u987b\u6574\u6bb5\u90fd\u662f\u5408\u6cd5\u6570\u5b57\uff0c\u5426\u5219\u629b\u5f02\u5e38\u3002<\/p>\n
public class Demo {\n    public static void main(String[] args) {\n        String str[] = {\"123\", \"123abc\", \"abc123\", \"abcxyz\"};\n        for (String str1 : str) {\n            try {\n                int m = Integer.parseInt(str1, 10);\n                System.out.println(str1 + \" \u53ef\u4ee5\u8f6c\u6362\u4e3a\u6574\u6570 \" + m);\n            } catch (Exception e) {\n                System.out.println(str1 + \" \u65e0\u6cd5\u8f6c\u6362\u4e3a\u6574\u6570\");\n            }\n        }\n    }\n}<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\uff1a\u53ea\u6709 123<\/code> \u80fd\u8f6c\uff1b\u540e\u9762\u4e09\u4e2a\u90fd\u65e0\u6cd5\u8f6c\u6362\u3002\u6574\u6570\u8f6c\u5b57\u7b26\u4e32\u7528\u9759\u6001 Integer.toString(m)<\/code>\uff0c\u4e5f\u53ef\u4ee5 String.valueOf(m)<\/code>\u3002<\/p>\n
int m = 500;\nString s = Integer.toString(m);\nSystem.out.println(\"s = \" + s);<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\uff1as = 500\u3002<\/p>\n
\u4e09\u3001\u81ea\u52a8\u88c5\u7bb1\u548c\u62c6\u7bb1<\/h2>\n
\u4e0a\u9762\u90fd\u662f\u624b\u52a8\u5b9e\u4f8b\u5316\u5305\u88c5\u7c7b\u3002Java 5 \u4e4b\u524d\u5fc5\u987b\u624b\u52a8\u62c6\u88c5\u7bb1\uff1bJava 5 \u8d77\u53ef\u4ee5\u81ea\u52a8\u8fdb\u884c\uff1a\u628a int \u8d4b\u7ed9 Integer \u4f1a\u88c5\u7bb1\uff0c\u628a Integer \u8d4b\u7ed9 int \u4f1a\u62c6\u7bb1\u3002<\/p>\n
public class Demo {\n    public static void main(String[] args) {\n        int m = 500;\n        Integer obj = m;  \/\/ \u81ea\u52a8\u88c5\u7bb1\uff0c\u76f8\u5f53\u4e8e Integer.valueOf(m)\n        int n = obj;      \/\/ \u81ea\u52a8\u62c6\u7bb1\uff0c\u76f8\u5f53\u4e8e obj.intValue()\n        System.out.println(\"n = \" + n);\n\n        Integer obj1 = 500;\n        System.out.println(\"obj \u7b49\u4ef7\u4e8e obj1\uff1f\" + obj.equals(obj1));\n    }\n}<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c\u540c\u6837\u662f n = 500\uff0c\u4ee5\u53ca equals \u4e3a true\u3002\u81ea\u52a8\u62c6\u88c5\u7bb1\u662f\u65e5\u5e38\u5199\u6cd5\uff0c\u4f46\u5305\u88c5\u7c7b\u578b\u4e3a null \u65f6\u62c6\u7bb1\u4f1a\u629b\u7a7a\u6307\u9488\uff0c\u9700\u8981\u7559\u610f\u3002<\/p>\n
\n
\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1a\u5305\u88c5\u7c7b\u628a\u516b\u79cd\u57fa\u672c\u7c7b\u578b\u53d8\u6210\u5bf9\u8c61\uff1b\u57fa\u672c\u7c7b\u578b\u8fdb\u5bf9\u8c61\u53eb\u88c5\u7bb1\uff0c\u51fa\u6765\u53eb\u62c6\u7bb1\uff0cJava 5 \u8d77\u53ef\u4ee5\u81ea\u52a8\u505a\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
Java \u662f\u9762\u5411\u5bf9\u8c61\u8bed\u8a00\uff0c\u4f46\u516b\u79cd\u57fa\u672c\u7c7b\u578b\u5e76\u4e0d\u5e26\u5bf9\u8c61\u7279\u6027\uff1a\u6ca1\u6709\u5c5e\u6027\u3001\u4e5f\u4e0d\u80fd\u8c03\u65b9\u6cd5\u3002\u4fdd\u7559\u5b83\u4eec\u662f\u4e3a\u4e86\u7b26\u5408\u4e60\u60ef\uff0c\u5e76\u8ba9\u5e38 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[43,30],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/117"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=117"}],"version-history":[{"count":3,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/117\/revisions"}],"predecessor-version":[{"id":383,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/117\/revisions\/383"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}