{"id":54,"date":"2015-03-30T09:18:47","date_gmt":"2015-03-30T01:18:47","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=54"},"modified":"2016-03-31T11:49:16","modified_gmt":"2016-03-31T03:49:16","slug":"java%e5%ad%97%e7%ac%a6%e4%b8%b2string","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=54","title":{"rendered":"Java\u5b57\u7b26\u4e32(String)"},"content":{"rendered":"

JAVA\u5b57\u7b26\u4e32<\/h3>\n

\u4ece\u8868\u9762\u4e0a\u770b\uff0c\u5b57\u7b26\u4e32\u5c31\u662f\u53cc\u5f15\u53f7\u4e4b\u95f4\u7684\u6570\u636e\uff0c\u4f8b\u5982\u201c\u6781\u5ba2\u4e4b\u5bb6\u201d\u3001\u201chttps:\/\/ai.zhousir.top\u201d\u7b49\uff0c\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u65b9\u6cd5\u5b9a\u4e49\u5b57\u7b26\u4e32\uff1a
\n<\/p>\n

[java]String stringName = "string content";
\nString url = "https:\/\/ai.zhousir.top";
\nString webName = "\u6781\u5ba2\u4e4b\u5bb6";
\n[\/java]<\/p>\n

\u5b57\u7b26\u4e32\u53ef\u4ee5\u901a\u8fc7\u201c+\u201d\u8fde\u63a5<\/h3>\n

\u57fa\u672c\u6570\u636e\u7c7b\u578b\u4e0e\u5b57\u7b26\u4e32\u8fdb\u884c\u201c+\u201d\u64cd\u4f5c\u4e00\u822c\u4e5f\u4f1a\u81ea\u52a8\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0c\u4f8b\u5982\uff1a<\/p>\n

[java]public class Demo {
\n\u00a0\u00a0\u00a0 public static void main(String[] args){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 String stuName = "\u5c0f\u660e";
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int stuAge = 17;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 float stuScore = 92.5f;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 String info = stuName + "\u7684\u5e74\u9f84\u662f " + stuAge + "\uff0c\u6210\u7ee9\u662f " + stuScore;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(info);
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\n\u5c0f\u660e\u7684\u5e74\u9f84\u662f 17\uff0c\u6210\u7ee9\u662f 92.5
\n[\/java]<\/p>\n

String\u5b57\u7b26\u4e32\u4e0e\u6570\u7ec4\u6709\u4e00\u4e2a\u5171\u540c\u70b9<\/h3>\n

\u5c31\u662f\u5b83\u4eec\u88ab\u521d\u59cb\u5316\u540e\uff0c\u957f\u5ea6\u662f\u4e0d\u53d8\u7684\uff0c\u5e76\u4e14\u5185\u5bb9\u4e5f\u4e0d\u53d8\u3002\u5982\u679c\u8981\u6539\u53d8\u5b83\u7684\u503c\uff0c\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\uff0c
\n\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

[java]
\nString str = "Hello ";
\nstr += "World!";
\n[\/java]<\/p>\n

\u8fd9\u4e2a\u8d4b\u503c\u8868\u8fbe\u5f0f\u770b\u8d77\u6765\u6709\u70b9\u50cf\u7b80\u5355\u7684\u63a5\u9f99\uff0c\u5728str\u540e\u9762\u76f4\u63a5\u52a0\u4e0a\u4e00\u4e2a\u201cWorld!\u201d\u5b57\u7b26\u4e32\uff0c\u5f62\u6210\u6700\u540e\u7684\u5b57\u7b26\u4e32\u201cHello World!\u201d\u3002\u5176\u8fd0\u884c\u539f\u7406\u662f\u8fd9\u6837\u7684\uff1a\u7a0b\u5e8f\u9996\u5148\u4ea7\u751f\u4e86str1\u5b57\u7b26\u4e32\uff0c\u5e76\u5728\u5185\u5b58\u4e2d\u7533\u8bf7\u4e86\u4e00\u6bb5\u7a7a\u95f4\u3002\u6b64\u65f6\u8981\u8ffd\u52a0\u65b0\u7684\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u80fd\u7684\uff0c\u56e0\u4e3a\u5b57\u7b26\u4e32\u88ab\u521d\u59cb\u5316\u540e\uff0c\u957f\u5ea6\u662f\u56fa\u5b9a\u7684\u3002\u5982\u679c\u8981\u6539\u53d8\u5b83\uff0c\u53ea\u6709\u653e\u5f03\u539f\u6765\u7684\u7a7a\u95f4\uff0c\u91cd\u65b0\u7533\u8bf7\u80fd\u591f\u5bb9\u7eb3\u201cHello World!\u201d\u5b57\u7b26\u4e32\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u7136\u540e\u5c06\u201cHello World!\u201d\u5b57\u7b26\u4e32\u653e\u5230\u5185\u5b58\u4e2d\u3002<\/p>\n

\u5b9e\u9645\u4e0a\uff0cString \u662fjava.lang\u5305\u4e0b\u7684\u4e00\u4e2a\u7c7b\uff0c\u6309\u7167\u6807\u51c6\u7684\u9762\u5411\u5bf9\u8c61\u7684\u8bed\u6cd5\uff0c\u5176\u683c\u5f0f\u5e94\u8be5\u4e3a\uff1a<\/p>\n

[java]String stringName = new String("string content");[\/java]<\/p>\n

\u4f8b\u5982\uff1a
\nString url = new String(“https:\/\/ai.zhousir.top”);
\n\u4f46\u662f\u7531\u4e8eString\u7279\u522b\u5e38\u7528\uff0c\u6240\u4ee5Java\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5316\u7684\u8bed\u6cd5\u3002<\/p>\n

\u4f7f\u7528\u7b80\u5316\u8bed\u6cd5\u7684\u53e6\u5916\u4e00\u4e2a\u539f\u56e0\u662f\uff0c\u6309\u7167\u6807\u51c6\u7684\u9762\u5411\u5bf9\u8c61\u7684\u8bed\u6cd5\uff0c\u5728\u5185\u5b58\u4f7f\u7528\u4e0a\u5b58\u5728\u6bd4\u8f83\u5927\u7684\u6d6a\u8d39\u3002\u4f8b\u5982String str = new String(\u201cabc\u201d);\u5b9e\u9645\u4e0a\u521b\u5efa\u4e86\u4e24\u4e2aString\u5bf9\u8c61\uff0c\u4e00\u4e2a\u662f\u201dabc\u201d\u5bf9\u8c61\uff0c\u5b58\u50a8\u5728\u5e38\u91cf\u7a7a\u95f4\u4e2d\uff0c\u4e00\u4e2a\u662f\u4f7f\u7528new\u5173\u952e\u5b57\u4e3a\u5bf9\u8c61str\u7533\u8bf7\u7684\u7a7a\u95f4\u3002<\/p>\n

\u5b57\u7b26\u4e32\u64cd\u4f5c<\/h3>\n

String\u5bf9\u8c61\u6709\u5f88\u591a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u65b9\u4fbf\u7684\u64cd\u4f5c\u5b57\u7b26\u4e32\u3002
\n1) length() \u65b9\u6cd5<\/strong><\/p>\n

length() \u8fd4\u56de\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u4f8b\u5982\uff1a<\/p>\n

[java]String str1 = "\u65b0\u534e\u82d1";
\nString str2 = "scxh";
\nSystem.out.println("The lenght of str1 is " + str1.length());
\nSystem.out.println("The lenght of str2 is " + str2.length());
\n\u8f93\u51fa\u7ed3\u679c\uff1a
\nThe lenght of str1 is 3
\nThe lenght of str2 is 10[\/java]<\/p>\n

\u53ef\u89c1\uff0c\u65e0\u8bba\u662f\u5b57\u6bcd\u3001\u6570\u5b57\uff0c\u8fd8\u662f\u6c49\u5b57\uff0c\u6bcf\u4e2a\u5b57\u7b26\u7684\u957f\u5ea6\u90fd\u662f1\u3002
\n2) charAt() \u65b9\u6cd5<\/strong><\/p>\n

charAt() \u65b9\u6cd5\u7684\u4f5c\u7528\u662f\u6309\u7167\u7d22\u5f15\u503c\u83b7\u5f97\u5b57\u7b26\u4e32\u4e2d\u7684\u6307\u5b9a\u5b57\u7b26\u3002Java\u89c4\u5b9a\uff0c\u5b57\u7b26\u4e32\u4e2d\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u7d22\u5f15\u503c\u662f0\uff0c\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u7684\u7d22\u5f15\u503c\u662f1\uff0c\u4f9d\u6b21\u7c7b\u63a8\u3002\u4f8b\u5982\uff1a<\/p>\n

[java]String str = "123456789";
\nSystem.out.println(str.charAt(0) + " \u00a0\u00a0 " + str.charAt(5) + " \u00a0\u00a0 " + str.charAt(8));
\n\u8f93\u51fa\u7ed3\u679c\uff1a
\n1 \u00a0\u00a0 6 \u00a0\u00a0 9[\/java]<\/p>\n

3) contains() \u65b9\u6cd5<\/strong><\/p>\n

contains() \u65b9\u6cd5\u7528\u6765\u68c0\u6d4b\u5b57\u7b26\u4e32\u662f\u5426\u5305\u542b\u67d0\u4e2a\u5b50\u4e32\uff0c\u4f8b\u5982\uff1a<\/p>\n

[java]String str = "warmtel";
\nSystem.out.println(str.contains("yuan"));
\n\u8f93\u51fa\u7ed3\u679c\uff1a
\ntrue[\/java]<\/p>\n

4) replace() \u65b9\u6cd5<\/strong><\/p>\n

\u5b57\u7b26\u4e32\u66ff\u6362\uff0c\u7528\u6765\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u6307\u5b9a\u7684\u5b50\u4e32\uff0c\u4f8b\u5982\uff1a<\/p>\n

[java]String str1 = "The url of weixueyuan is www.warmtel.com!";
\nString str2 = str1.replace("warmtel", "\u65b0\u534e\u82d1");
\nSystem.out.println(str1);
\nSystem.out.println(str2);
\n\u8f93\u51fa\u7ed3\u679c\uff1a
\nThe url of warmtelis www.warmtel.com!
\nThe url of \u65b0\u534e\u82d1"is www.\u65b0\u534e\u82d1".com![\/java]<\/p>\n

\u6ce8\u610f\uff1areplace() \u65b9\u6cd5\u4e0d\u4f1a\u6539\u53d8\u539f\u6765\u7684\u5b57\u7b26\u4e32\uff0c\u800c\u662f\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002
\n5) split() \u65b9\u6cd5<\/strong><\/p>\n

\u4ee5\u6307\u5b9a\u5b57\u7b26\u4e32\u4f5c\u4e3a\u5206\u9694\u7b26\uff0c\u5bf9\u5f53\u524d\u5b57\u7b26\u4e32\u8fdb\u884c\u5206\u5272\uff0c\u5206\u5272\u7684\u7ed3\u679c\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u4f8b\u5982\uff1a<\/p>\n

[java]import java.util.*;
\npublic class Demo {
\n\u00a0\u00a0\u00a0 public static void main(String[] args){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 String str = "wei_xue_yuan_is_good";
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 String strArr[] = str.split("_");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(Arrays.toString(strArr));
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\n[wei, xue, yuan, is, good][\/java]<\/p>\n

\u4ee5\u4e0a\u4ec5\u4ec5\u5217\u4e3e\u4e86\u51e0\u4e2a\u5e38\u7528\u7684String\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u66f4\u591a\u65b9\u6cd5\u548c\u8be6\u7ec6\u89e3\u91ca\u8bf7\u53c2\u8003API\u6587\u6863\u3002<\/p>\n

 <\/p>\n

\u53c2\u8003\uff1a\u521d\u63a2Java\u5b57\u7b26\u4e32<\/a><\/h4>\n","protected":false},"excerpt":{"rendered":"

JAVA\u5b57\u7b26\u4e32 \u4ece\u8868\u9762\u4e0a\u770b\uff0c\u5b57\u7b26\u4e32\u5c31\u662f\u53cc\u5f15\u53f7\u4e4b\u95f4\u7684\u6570\u636e\uff0c\u4f8b\u5982\u201c\u6781\u5ba2\u4e4b\u5bb6\u201d\u3001\u201chttps:\/\/ai.zhousi […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15],"tags":[29],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/54"}],"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=54"}],"version-history":[{"count":10,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/54\/revisions"}],"predecessor-version":[{"id":1511,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/54\/revisions\/1511"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=54"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=54"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=54"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}