{"id":400,"date":"2022-09-20T11:19:16","date_gmt":"2022-09-20T03:19:16","guid":{"rendered":"https:\/\/qaqaq.top\/?p=400"},"modified":"2022-11-27T12:40:02","modified_gmt":"2022-11-27T04:40:02","slug":"java%e4%b8%adstring%e7%b1%bb%e7%9a%84%e5%88%9d%e5%a7%8b%e5%8c%96","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=400","title":{"rendered":"Java\u4e2dString\u7c7b\u7684\u521d\u59cb\u5316?"},"content":{"rendered":"\n

\u3000\u5728\u64cd\u4f5cString\u7c7b\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5bf9String\u7c7b\u8fdb\u884c\u521d\u59cb\u5316\u3002\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u5bf9String\u7c7b\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u30001.\u4f7f\u7528\u5b57\u7b26\u4e32\u5e38\u91cf\u76f4\u63a5\u521d\u59cb\u5316\u4e00\u4e2aString\u5bf9\u8c61\uff0c\u5176\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u3000String \u53d8\u91cf\u540d= \u5b57\u7b26\u4e32;<\/p>\n\n\n\n

\u3000\u3000\u5728\u521d\u59cb\u5316\u5b57\u7b26\u4e32\u5bf9\u8c61\u65f6\uff0c\u65e2\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u503c\u8bbe\u4e3a\u7a7a\uff0c\u4e5f\u53ef\u4ee5\u521d\u59cb\u5316\u4e3a\u4e00\u4e2a\u5177\u4f53\u7684\u5b57\u7b26\u4e32\uff0c\u5176\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u3000String str1 = null; \/\/ \u521d\u59cb\u5316\u4e3a\u7a7a<\/p>\n\n\n\n

\u3000\u3000String str2 = “”; \/\/ \u521d\u59cb\u5316\u4e3a\u7a7a\u5b57\u7b26\u4e32<\/p>\n\n\n\n

\u3000\u3000String str3 = “abc”; \/\/ \u521d\u59cb\u5316\u4e3aabc,\u5176\u4e2dabc\u4e3a\u5b57\u7b26\u4e32\u5e38\u91cf<\/p>\n\n\n\n

\u3000\u30002.\u4f7f\u7528String\u7684\u6784\u9020\u65b9\u6cd5\u521d\u59cb\u5316\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u5176\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u3000String \u53d8\u91cf\u540d = new String(\u5b57\u7b26\u4e32);<\/p>\n\n\n\n

\u3000\u3000\u5728\u4e0a\u8ff0\u8bed\u6cd5\u4e2d\uff0c\u5b57\u7b26\u4e32\u540c\u6837\u53ef\u4ee5\u4e3a\u7a7a\u6216\u662f\u4e00\u4e2a\u5177\u4f53\u7684\u5b57\u7b26\u4e32\u3002\u5f53\u4e3a\u5177\u4f53\u5b57\u7b26\u4e32\u65f6\uff0c\u4f1a\u4f7f\u7528String\u7c7b\u7684\u4e0d\u540c\u53c2\u6570\u7c7b\u578b\u7684\u6784\u9020\u65b9\u6cd5\u6765\u521d\u59cb\u5316\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002<\/p>\n\n\n\n

\u3000\u3000String\u7c7b\u4e2d\u5305\u542b\u591a\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u5e38\u7528\u7684\u6784\u9020\u65b9\u6cd5\u5982\u88681\u6240\u793a\u3002<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u88681 String\u7c7b\u7684\u5e38\u7528\u6784\u9020\u65b9\u6cd5<\/p>\n\n\n\n

\u3000\u3000\u88681\u4e2d\uff0c\u5217\u51fa\u4e86String\u7c7b\u7684\u4e09\u79cd\u6784\u9020\u65b9\u6cd5\uff0c\u901a\u8fc7\u8c03\u7528\u4e0d\u540c\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5\u4fbf\u53ef\u5b8c\u6210String\u7c7b\u7684\u521d\u59cb\u5316\u3002\u63a5\u4e0b\u6765\u901a\u8fc7\u4e00\u4e2a\u6848\u4f8b\u6765\u5b66\u4e60String\u7c7b\u662f\u5982\u4f55\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u6765\u521d\u59cb\u5316\u5b57\u7b26\u4e32\u5bf9\u8c61\u7684\uff0c\u5982\u6587\u4ef61\u6240\u793a\u3002<\/p>\n\n\n\n

\u3000\u3000public class Example01 {<\/p>\n\n\n\n

\u3000\u3000public static void main(String[] args) {<\/p>\n\n\n\n

\u3000\u3000\/\/ \u521b\u5efa\u4e00\u4e2a\u7a7a\u7684\u5b57\u7b26\u4e32<\/p>\n\n\n\n

\u3000\u3000String str1 = new String();<\/p>\n\n\n\n

\u3000\u3000\/\/ \u521b\u5efa\u4e00\u4e2a\u5185\u5bb9\u4e3aabc\u7684\u5b57\u7b26\u4e32<\/p>\n\n\n\n

\u3000\u3000String str2 = new String(“abc”);<\/p>\n\n\n\n

\u3000\u3000\/\/ \u521b\u5efa\u4e00\u4e2a\u5185\u5bb9\u4e3a\u5b57\u7b26\u6570\u7ec4\u7684\u5b57\u7b26\u4e32<\/p>\n\n\n\n

\u3000\u3000char[] charArray = new char[] { ‘A’, ‘B’, ‘C’ };<\/p>\n\n\n\n

\u3000\u3000String str3 = new String(charArray);<\/p>\n\n\n\n

\u3000\u3000\/\/ \u8f93\u51fa\u7ed3\u679c<\/p>\n\n\n\n

\u3000\u3000System.out.println(“a” + str1 + “b”);<\/p>\n\n\n\n

\u3000\u3000System.out.println(str2);<\/p>\n\n\n\n

\u3000\u3000System.out.println(str3);<\/p>\n\n\n\n

\u3000\u3000}<\/p>\n\n\n\n

\u3000\u3000}<\/p>\n\n\n\n

\u3000\u3000\u8fd0\u884c\u7ed3\u679c\u5982\u56fe1\u6240\u793a\u3002<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u3000\u3000\u6587\u4ef61\u4e2d\uff0c\u5206\u522b\u4f7f\u7528\u88681\u4e2d\u76843\u4e2a\u6784\u9020\u65b9\u6cd5\u521b\u5efa\u4e86\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002\u5176\u4e2d\u7b2c4\u884c\u4ee3\u7801\u4f7f\u7528\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u521b\u5efa\u7684\u662f\u4e00\u4e2a\u7a7a\u5b57\u7b26\u4e32\uff0c\u6240\u4ee5\u7b2c\u4e00\u4e2a\u8f93\u51fa\u8bed\u53e5\u4e2d\u7684str1\u4e3a\u7a7a(\u201d\u201d)\uff0c\u5f53\u4f7f\u7528\u8fde\u5b57\u7b26(+)\u8fde\u63a5a\u548cb\u540e\uff0c\u8f93\u51fa\u7684\u7ed3\u679c\u4e3aab\u3002\u7b2c6\u884c\u4ee3\u7801\u4f7f\u7528\u53c2\u6570\u7c7b\u578b\u4e3aString\u7684\u6784\u9020\u65b9\u6cd5\u521b\u5efa\u4e86\u4e00\u4e2a\u5185\u5bb9\u4e3aabc\u7684\u5b57\u7b26\u4e32\uff0c\u7b2c8~9\u884c\u4ee3\u7801\u4f7f\u7528\u53c2\u6570\u7c7b\u578b\u4e3a\u5b57\u7b26\u6570\u7ec4\u7684\u6784\u9020\u65b9\u6cd5\u521b\u5efa\u4e86\u4e00\u4e2a\u5185\u5bb9\u4e3a\u5b57\u7b26\u6570\u7ec4\u7684\u5b57\u7b26\u4e32\u3002\u4ece\u56fe1\u53ef\u4ee5\u770b\u51fa\uff0c\u5b83\u4eec\u6700\u540e\u7684\u8f93\u51fa\u7ed3\u679c\u5c31\u662f\u5b58\u50a8\u5728\u5b57\u7b26\u4e32\u5bf9\u8c61\u4e2d\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n

\u3000\u3000\u5c0f\u63d0\u793a\uff1a<\/strong><\/p>\n\n\n\n

\u3000\u3000\u8fde\u63a5\u5b57\u7b26\u4e32\u53ef\u4ee5\u901a\u8fc7\u8fd0\u7b97\u7b26\u201c+\u201d\u6765\u5b9e\u73b0\uff0c\u4f8b\u5982\u4e0a\u9762\u6848\u4f8b\u4ee3\u7801(“a” + str1 + “b”)\u4e2d\u7684\u201c+\u201d\u7684\u4f5c\u7528\u5c31\u662f\u5c06\u4e24\u4e2a\u5b57\u7b26\u4e32\u5408\u5e76\u5230\u4e00\u8d77\u5e76\u751f\u6210\u65b0\u7684\u5b57\u7b26\u4e32\u3002\u5728Java\u4e2d\uff0c\u5982\u679c\u201c+\u201d\u7684\u4e24\u8fb9\u64cd\u4f5c\u6570\u6709\u4e00\u4e2a\u4e3aString\u7c7b\u578b\uff0c\u90a3\u4e48\u201c+\u201d\u5c31\u8868\u793a\u5b57\u7b26\u4e32\u8fde\u63a5\u8fd0\u7b97\u7b26\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u3000\u5728\u64cd\u4f5cString\u7c7b\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5bf9String\u7c7b\u8fdb\u884c\u521d\u59cb\u5316\u3002\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u5bf9Strin […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[46],"class_list":["post-400","post","type-post","status-publish","format-standard","hentry","category-java-","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/400"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=400"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/400\/revisions"}],"predecessor-version":[{"id":403,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/400\/revisions\/403"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}