{"id":72009,"date":"2024-02-20T15:06:05","date_gmt":"2024-02-20T07:06:05","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=72009"},"modified":"2024-02-20T15:12:45","modified_gmt":"2024-02-20T07:12:45","slug":"java-%e4%bc%a0%e5%8f%82%e6%97%b6%ef%bc%8c%e5%a6%82%e4%bd%95%e5%81%9a%e5%88%b0%e4%b8%a4%e4%b8%aa-string-%e5%ae%9e%e5%8f%82%e7%9a%84%e5%ae%9e%e9%99%85%e5%80%bc%e4%ba%a4%e6%8d%a2-3","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/72009.html","title":{"rendered":"Java \u4f20\u53c2\u65f6\uff0c\u5982\u4f55\u505a\u5230\u4e24\u4e2a String \u5b9e\u53c2\u7684\u5b9e\u9645\u503c\u4ea4\u6362"},"content":{"rendered":"

\"Java<\/p>\n

\u5728Java\u7f16\u7a0b\u4e2d\uff0c\u5b9e\u73b0\u4e24\u4e2a`String`\u5b9e\u53c2\u7684\u5b9e\u9645\u503c\u4ea4\u6362<\/strong>\u662f\u4e00\u4e2a\u770b\u4f3c\u7b80\u5355\u4f46\u5b9e\u8d28\u4e0a\u5177\u6709\u4e00\u5b9a\u6311\u6218\u6027\u7684\u4efb\u52a1\u3002\u7531\u4e8e`String`\u5728Java\u4e2d\u662f\u4e0d\u53ef\u53d8\u7684\uff08Immutable\uff09\uff0c\u76f4\u63a5\u5728\u65b9\u6cd5\u4e2d\u4ea4\u6362\u4e24\u4e2a`String`\u53d8\u91cf\u7684\u503c\u5e76\u4e0d\u80fd\u5f71\u54cd\u5230\u65b9\u6cd5\u5916\u90e8\u53d8\u91cf\u7684\u503c\u3002\u56e0\u6b64\uff0c\u5728\u65b9\u6cd5\u5185\u90e8\u76f4\u63a5\u4ea4\u6362\u5b57\u7b26\u4e32\u7684\u5f15\u7528\u4e0d\u4f1a\u5f71\u54cd\u5230\u539f\u5b57\u7b26\u4e32<\/strong>\u3002\u8fd9\u610f\u5473\u7740\uff0c\u6211\u4eec\u9700\u8981\u91c7\u7528\u4e00\u79cd\u5de7\u5999\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\u3002\u4e00\u4e2a\u5e38\u89c1\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u5305\u542b`String`\u5b57\u6bb5\u7684\u53ef\u53d8\u5bf9\u8c61\uff0c\u6216\u8005\u4f7f\u7528\u6570\u7ec4\u4f5c\u4e3a\u4f20\u9012\u53c2\u6570\u7684\u5bb9\u5668\uff0c\u8fd9\u6837\u901a\u8fc7\u4fee\u6539\u5bb9\u5668\u5185\u7684\u5143\u7d20\u5b9e\u73b0\u503c\u7684\u4ea4\u6362\u3002<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u4f7f\u7528\u53ef\u53d8\u5bb9\u5668\u6765\u5b9e\u73b0`String`\u503c\u4ea4\u6362\u7684\u65b9\u6cd5\uff0c\u5e76\u89e3\u91ca\u4e3a\u4ec0\u4e48\u76f4\u63a5\u5728\u65b9\u6cd5\u5185\u4ea4\u6362`String`\u53d8\u91cf\u7684\u5f15\u7528\u4e0d\u4f1a\u6539\u53d8\u539f\u6709\u53d8\u91cf\u7684\u503c\u3002<\/p>\n

### \u4e00\u3001\u4e3a\u4ec0\u4e48\u76f4\u63a5\u4ea4\u6362\u4e0d\u53ef\u884c<\/p>\n

Java\u4e2d\u7684`String`\u7c7b\u578b\u88ab\u8bbe\u8ba1\u4e3a\u4e0d\u53ef\u53d8\u7684\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u65e6`String`\u5bf9\u8c61\u88ab\u521b\u5efa\uff0c\u5176\u503c\u5c31\u65e0\u6cd5\u6539\u53d8\u3002\u5f53\u6211\u4eec\u5c1d\u8bd5\u4fee\u6539`String`\u7684\u5185\u5bb9\u65f6\uff0c\u5b9e\u9645\u4e0a\u662f\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684`String`\u5bf9\u8c61\uff0c\u800c\u539f\u59cb\u5bf9\u8c61\u7684\u5185\u5bb9\u4fdd\u6301\u4e0d\u53d8\u3002\u8fd9\u4e2a\u7279\u6027\u4f7f\u5f97\u5728\u65b9\u6cd5\u4e2d\u76f4\u63a5\u4ea4\u6362\u4e24\u4e2a`String`\u53d8\u91cf\u7684\u5f15\u7528\u53ea\u80fd\u6539\u53d8\u65b9\u6cd5\u5185\u90e8\u7684\u5c40\u90e8\u53d8\u91cf\uff0c\u5bf9\u65b9\u6cd5\u5916\u7684\u5b9e\u53c2\u65e0\u5f71\u54cd\u3002<\/p>\n

### \u4e8c\u3001\u4f7f\u7528\u5305\u542b`String`\u5b57\u6bb5\u7684\u53ef\u53d8\u5bf9\u8c61<\/p>\n

\u4e3a\u4e86\u5b9e\u73b0\u4e24\u4e2a`String`\u5b9e\u53c2\u7684\u503c\u4ea4\u6362\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u7b80\u5355\u7684\u5305\u542b`String`\u5b57\u6bb5\u7684\u53ef\u53d8\u5bf9\u8c61\u3002\u8fd9\u4e2a\u5bf9\u8c61\u53ef\u4ee5\u662f\u4efb\u4f55\u542b\u6709`String`\u6210\u5458\u53d8\u91cf\u7684\u7c7b\uff0c\u901a\u8fc7\u6539\u53d8\u8fd9\u4e2a\u5bf9\u8c61\u5185\u90e8`String`\u5b57\u6bb5\u7684\u503c\uff0c\u6211\u4eec\u53ef\u4ee5\u95f4\u63a5\u5730\u4ea4\u6362\u4e24\u4e2a`String`\u53d8\u91cf\u7684\u503c\u3002<\/p>\n

\u5b9e\u73b0\u6b65\u9aa4<\/strong>\uff1a<\/p>\n

1. \u5b9a\u4e49\u4e00\u4e2a\u5305\u542b`String`\u5b57\u6bb5\u7684\u7c7b\uff08\u4f8b\u5982\uff0c`StringWrapper`\uff09\u3002<\/p>\n

2. \u5728\u65b9\u6cd5\u8c03\u7528\u65f6\uff0c\u4f7f\u7528`StringWrapper`\u5b9e\u4f8b\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u3002<\/p>\n

3. \u5728\u65b9\u6cd5\u5185\u90e8\uff0c\u901a\u8fc7\u64cd\u4f5c\u8fd9\u4e9b`StringWrapper`\u5bf9\u8c61\u7684\u5b57\u6bb5\u6765\u4ea4\u6362`String`\u503c\u3002<\/p>\n

\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u5728\u65b9\u6cd5\u8c03\u7528\u540e\u53cd\u6620\u51fa\u5b57\u7b26\u4e32\u7684\u4ea4\u6362\u6548\u679c\uff0c\u4f46\u9700\u8981\u989d\u5916\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u5e76\u5728\u65b9\u6cd5\u8c03\u7528\u4e2d\u4f7f\u7528\u8be5\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n

### \u4e09\u3001\u4f7f\u7528\u6570\u7ec4\u4f5c\u4e3a\u4f20\u9012\u53c2\u6570\u7684\u5bb9\u5668<\/p>\n

\u53e6\u4e00\u79cd\u5b9e\u73b0\u4e24\u4e2a`String`\u503c\u4ea4\u6362\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u6570\u7ec4\u3002\u7531\u4e8e\u6570\u7ec4\u662f\u53ef\u53d8\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4e24\u4e2a`String`\u53d8\u91cf\u4f5c\u4e3a\u6570\u7ec4\u7684\u4e24\u4e2a\u5143\u7d20\u4f20\u9012\u7ed9\u65b9\u6cd5\uff0c\u5728\u65b9\u6cd5\u5185\u90e8\u4ea4\u6362\u8fd9\u4e24\u4e2a\u6570\u7ec4\u5143\u7d20\u7684\u503c\u3002<\/p>\n

\u5b9e\u73b0\u6b65\u9aa4<\/strong>\uff1a<\/p>\n

1. \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u4e24\u4e2a`String`\u5143\u7d20\u7684\u6570\u7ec4\u3002<\/p>\n

2. \u5c06\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u8d1f\u8d23\u4ea4\u6362\u7684\u65b9\u6cd5\u3002<\/p>\n

3. \u5728\u65b9\u6cd5\u5185\u90e8\uff0c\u4ea4\u6362\u6570\u7ec4\u7684\u4e24\u4e2a\u5143\u7d20\u7684\u4f4d\u7f6e\u3002<\/p>\n

\u4f7f\u7528\u6570\u7ec4\u662f\u4e00\u79cd\u7b80\u4fbf\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u907f\u514d\u4e86\u5b9a\u4e49\u989d\u5916\u7684\u7c7b\u3002\u6b64\u5916\uff0c\u8fd9\u79cd\u65b9\u6cd5\u7684\u5b9e\u73b0\u548c\u7406\u89e3\u90fd\u76f8\u5bf9\u7b80\u5355\u76f4\u63a5\u3002<\/p>\n

### \u56db\u3001\u7ed3\u8bba<\/p>\n

\u867d\u7136\u5728Java\u4e2d\u76f4\u63a5\u4ea4\u6362\u4e24\u4e2a`String`\u5b9e\u53c2\u7684\u503c\u4e0d\u53ef\u884c\uff0c\u4f46\u901a\u8fc7\u4f7f\u7528\u5305\u542b`String`\u5b57\u6bb5\u7684\u53ef\u53d8\u5bf9\u8c61\u6216\u6570\u7ec4\u4f5c\u4e3a\u4e2d\u4ecb\uff0c\u6211\u4eec\u53ef\u4ee5\u6709\u6548\u5730\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u573a\u666f\u548c\u4f18\u7f3a\u70b9\uff0c\u9009\u62e9\u54ea\u4e00\u79cd\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u4e0a\u4e0b\u6587\u73af\u5883\u3002\u901a\u8fc7\u8fd9\u4e9b\u6280\u5de7\uff0cJava\u5f00\u53d1\u8005\u53ef\u4ee5\u7075\u6d3b\u5730\u89e3\u51b3\u5b57\u7b26\u4e32\u503c\u4ea4\u6362\u7684\u95ee\u9898\uff0c\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u7528\u6027\u548c\u7075\u6d3b\u6027\u3002<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u5982\u4f55\u5728Java\u4e2d\u5b9e\u73b0\u4e24\u4e2aString\u7c7b\u578b\u5b9e\u53c2\u7684\u5b9e\u9645\u503c\u4ea4\u6362\uff1f<\/strong><\/p>\n

\u5728Java\u4e2d\uff0cString\u7c7b\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u65e0\u6cd5\u76f4\u63a5\u4ea4\u6362\u4e24\u4e2aString\u5b9e\u53c2\u7684\u5b9e\u9645\u503c\u3002\u4f46\u53ef\u4ee5\u4f7f\u7528StringBuilder\u7c7b\u6765\u5b9e\u73b0\u4ea4\u6362\u64cd\u4f5c\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a
\n1. \u521b\u5efa\u4e00\u4e2aStringBuilder\u5bf9\u8c61\uff0c\u5e76\u5c06\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570\u8d4b\u503c\u7ed9\u5b83\u3002
\n2. \u5c06\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570\u5b58\u50a8\u5728\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cf\u4e2d\u3002
\n3. \u5c06\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570\u7684\u503c\u8d4b\u7ed9\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570\u3002
\n4. \u6700\u540e\uff0c\u5c06\u4e4b\u524d\u5b58\u50a8\u7684\u4e34\u65f6\u53d8\u91cf\u7684\u503c\u8d4b\u7ed9\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570\u3002<\/p>\n

\u5982\u4f55\u5229\u7528Java\u7684\u5f15\u7528\u4f20\u9012\u673a\u5236\u6765\u4ea4\u6362\u4e24\u4e2aString\u5b9e\u53c2\u7684\u5b9e\u9645\u503c\uff1f<\/strong><\/p>\n

\u5728Java\u4e2d\uff0c\u6240\u6709\u7684\u53c2\u6570\u4f20\u9012\u90fd\u662f\u901a\u8fc7\u503c\u4f20\u9012\uff0c\u5305\u62ec\u5f15\u7528\u7c7b\u578b\u3002\u8981\u5b9e\u73b0\u4ea4\u6362\u4e24\u4e2aString\u5b9e\u53c2\u7684\u5b9e\u9645\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5305\u542b\u4e24\u4e2a\u5143\u7d20\u7684String\u6570\u7ec4\uff0c\u5206\u522b\u5b58\u50a8\u8fd9\u4e24\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570\u7684\u503c\u3002\u4ea4\u6362\u7684\u8fc7\u7a0b\u5c31\u662f\u4ea4\u6362\u6570\u7ec4\u5143\u7d20\u7684\u8fc7\u7a0b\u3002<\/p>\n

\u5728Java\u4e2d\uff0c\u5982\u4f55\u901a\u8fc7\u4f7f\u7528\u81ea\u5b9a\u4e49\u5bf9\u8c61\u6765\u5b9e\u73b0\u4e24\u4e2aString\u5b9e\u53c2\u7684\u5b9e\u9645\u503c\u4ea4\u6362\uff1f<\/strong><\/p>\n

\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684Java\u5bf9\u8c61\uff0c\u5982\u4e00\u4e2a\u5305\u542b\u4e24\u4e2aString\u5b57\u6bb5\u7684\u7c7b\u3002\u5728\u8fd9\u4e2a\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u7f16\u5199\u4e00\u4e2a\u65b9\u6cd5\u6765\u4ea4\u6362\u8fd9\u4e24\u4e2a\u5b57\u6bb5\u7684\u503c\u3002\u7136\u540e\u5c06\u4f20\u5165\u7684\u4e24\u4e2aString\u5b9e\u53c2\u5206\u522b\u8d4b\u503c\u7ed9\u8fd9\u4e2a\u81ea\u5b9a\u4e49\u5bf9\u8c61\u7684\u5b57\u6bb5\uff0c\u8c03\u7528\u4ea4\u6362\u65b9\u6cd5\u6765\u5b9e\u73b0\u5b9e\u9645\u503c\u7684\u4ea4\u6362\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Java\u7f16\u7a0b\u4e2d\uff0c\u5b9e\u73b0\u4e24\u4e2a`String`\u5b9e\u53c2\u7684\u5b9e\u9645\u503c\u4ea4\u6362\u662f\u4e00\u4e2a\u770b\u4f3c\u7b80\u5355\u4f46\u5b9e\u8d28\u4e0a\u5177\u6709\u4e00\u5b9a\u6311\u6218\u6027\u7684\u4efb\u52a1\u3002\u7531\u4e8e`S […]","protected":false},"author":1,"featured_media":72033,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/72009"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=72009"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/72009\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/72033"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=72009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=72009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=72009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}