{"id":232955,"date":"2020-12-29T08:00:37","date_gmt":"2020-12-29T00:00:37","guid":{"rendered":"http:\/\/4563.org\/?p=232955"},"modified":"2020-12-29T08:00:37","modified_gmt":"2020-12-29T00:00:37","slug":"%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%bf%e5%ba%a6%e4%b8%ba-0-%e4%bd%86%e5%8f%88%e4%b8%8d%e7%ad%89%e4%ba%8e%e6%98%af%e6%80%8e%e4%b9%88%e5%9b%9e%e4%ba%8b%e5%91%a2%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=232955","title":{"rendered":"\u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 0 \u4f46\u53c8\u4e0d\u7b49\u4e8e””\u662f\u600e\u4e48\u56de\u4e8b\u5462\uff1f"},"content":{"rendered":"
\n
\n
\n

\u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 0 \u4f46\u53c8\u4e0d\u7b49\u4e8e””\u662f\u600e\u4e48\u56de\u4e8b\u5462\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : Frankhong <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

String s=”hello”;<\/p>\n

String substr=s.substring(5);<\/p>\n

System.out.println(substr==””);\/\/\u6253\u5370 false<\/p>\n

System.out.println(substr.length()==0);\/\/\u6253\u5370 true<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (23<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Tubering <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    substr.equals(“”); <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : gainsurier <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    undefined hhhh <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jmc891205 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    substr \u548c\u201d\u201d\u662f\u4e0d\u540c\u7684 object <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : binbinyouliiii <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u91cd\u4fee Java <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : momocraft <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    jawa \u91cc\u9762\u5bf9\u8c61==\u662f\u5f15\u7528\u76f8\u7b49, equals (\u4e00\u822c) \u662f\u503c\u76f8\u7b49 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : tudouxiong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    Java \u5b57\u7b26\u4e32\u4e0d\u5e94\u8be5\u7528==\u6bd4\u8f83 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : Frankhong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    Java \u91cc\u9762\u4e24\u4e2a\u5b57\u7b26\u4e32\u53d8\u91cf\u9700\u8981\u7528 equals \u6765\u6bd4\u8f83\uff0c\u4f46\u662f\u53d8\u91cf\u548c\u5e26\u5f15\u53f7\u7684\u5b57\u7b26\u4e32\u662f\u53ef\u4ee5\u7528==\u6765\u6bd4\u8f83\u7684\u3002\u5e76\u4e14\u76f4\u63a5\u5b9a\u4e49\u4e00\u4e2a\u7a7a\u5b57\u7b26\u4e32\uff0c==””\u662f\u8fd4\u56de true \u7684\uff1a
    String s=””;<\/p>\n

    System.out.println(s==””);\/\/\u8fd4\u56de true <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : Frankhong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3a\u4ec0\u4e48\u5728\u8fd9\u91cc==””\u5374\u8fd4\u56de\u4e86 false \u5462\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : AllenHua <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Frankhong #7 \u5b57\u7b26\u4e32\u5e38\u91cf\u6c60 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : AllenHua <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @AllenHua #9 \u8fd9\u6761\u56de\u590d 7 \uff1b substr \u662f new \u51fa\u6765\u7684 String \u5bf9\u8c61 reference \u4e0d\u4e00\u81f4 == \u6bd4\u8f83 \u80af\u5b9a\u662f false <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : micean <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    System.out.println(substr==””);\/\/\u6253\u5370 false
    System.out.println(substr.intern()==””);\/\/\u6253\u5370 true <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Jooooooooo <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4eba\u548c\u4eba\u90fd\u662f\u4eba<\/p>\n

    \u4f46\u662f\u662f\u4e0d\u540c\u7684\u4e2a\u4f53 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nmlgb <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u628a c++\u548c java \u641e\u6df7\u4e86\u3002c++\u662f\u53ef\u4ee5\u8fd9\u6837\u7684\uff0cjava \u4e0d\u884c\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : chrisia <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u81ea\u5df1\u770b\u6e90\u7801\uff0csubstring \u622a\u53d6\u7684\u5b57\u7b26\u4e32\u4f1a\u4ee5 new String \u7684\u65b9\u5f0f\u8fd4\u56de\uff0c\u6240\u4ee5\u4e3a false \u3002\u53e6\u5916\uff0c\u6bd4\u8f83\u5b57\u7b26\u4e32\u603b\u662f\u7528 equals \u5c31\u4e0d\u4f1a\u6709\u95ee\u9898\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nmlgb <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @binbinyouliiii \u867d\u7136\u8fd9\u662f\u4e00\u9053\u5f88\u57fa\u7840\u7684\u9898\u4f46\u6211\u89c9\u5f97\u9634\u9633\u602a\u6c14\u6ca1\u6709\u5fc5\u8981\u3002\u8c01\u6ca1\u6709\u5e74\u8f7b\u7684\u65f6\u5019 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : binbinyouliiii <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @nmlgb #15 \u9634\u9633\u602a\u6c14\uff1f\u8fd9\u8bcd\u73b0\u5728\u8fd9\u4e48\u6ee5\u7528\u7684\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : Frankhong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @AllenHua \u61c2\u4e86\uff0cString \u76f4\u63a5\u8d4b\u5b57\u7b26\u4e32\u548c new String \u6709\u533a\u522b\uff0c\u8c22\u8c22\u5144\u5f1f\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : Frankhong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @micean \u591a\u8c22\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : SingeeKing <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    Java \u4e0d\u652f\u6301\u8fd0\u7b97\u7b26\u91cd\u8f7d\u662f\u771f\u7684\u96be\u53d7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : crayygy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    String \u6709\u7f13\u5b58\u6c60\u7684\uff0c\u6240\u4ee5\u76f4\u63a5 == \u6709\u65f6\u5019\u4e5f\u662f\u8fd4\u56de true\uff0c\u4f46\u4e0d\u4ee3\u8868\u8fd9\u662f\u6b63\u786e\u505a\u6cd5\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Ptu2sha <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u3002\u3002\u3002java \u5b66\u4e60\u7b2c\u4e00\u5929\u5c31\u662f\u77e5\u9053\u5b57\u7b26\u4e32\u6bd4\u8f83\u4e0d\u662f= <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : agagega <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u54c8\u54c8\u54c8\uff0cJava \u4e00\u5927\u5751 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lewis89 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @SingeeKing #19 \u6709\u8fd0\u7b97\u7b26\u91cd\u8f7d\u624d\u96be\u53d7\uff0c\u4f60\u90fd\u4e0d\u77e5\u9053\u4f60\u7684\u8868\u8fbe\u5f0f\u88ab\u4eba\u91cd\u8f7d\u6210\u4ec0\u4e48\u6837\u4e86\uff0c\u6211\u57fa\u672c\u4e0a\u770b\u4e0d\u5230 \u91cd\u8f7d\u4e0d\u88ab\u6ee5\u7528\u7684\u60c5\u51b5\uff0c\u597d\u597d\u7684\u7528\u51fd\u6570\u4e0d\u597d\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 0 \u4f46\u53c8\u4e0d\u7b49\u4e8e&#8…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/232955"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=232955"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/232955\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=232955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=232955"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=232955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}