{"id":1118,"date":"2016-03-16T16:17:25","date_gmt":"2016-03-16T08:17:25","guid":{"rendered":"http:\/\/jingxianhome.aliapp.com\/?p=1118"},"modified":"2016-03-16T16:17:25","modified_gmt":"2016-03-16T08:17:25","slug":"android-%e9%9d%99%e6%80%81%e4%bb%a3%e7%a0%81%e6%89%ab%e6%8f%8f%e8%a7%84%e5%88%99","status":"publish","type":"post","link":"https:\/\/www.yeetrack.com\/?p=1118","title":{"rendered":"Android \u9759\u6001\u4ee3\u7801\u626b\u63cf\u89c4\u5219"},"content":{"rendered":"

\u963b\u585e<\/h2>\n
    \n
  1. \u4e0d\u53ef\u80fd\u7684\u8f6c\u6362<\/li>\n
  2. \u4f7f\u7528equals()\u65b9\u6cd5\u6bd4\u8f83\u7c7b\u578b\u4e0d\u901a\u7684\u6570\u7ec4<\/li>\n
  3. \u786c\u7f16\u7801\u4e86\u6570\u636e\u5e93\u5bc6\u7801<\/li>\n
  4. \u6027\u80fd - URL\u7684equals \u548c hashCode \u65b9\u6cd5\u4f1a\u88ab\u5835\u585e http:\/\/michaelscharf.blogspot.com\/2006\/11\/javaneturlequals-and-hashcode-make.html<\/li>\n
  5. \u6027\u80fd - URL\u7684Maps \u548c sets\u53ef\u80fd\u662f\u6027\u80fd\u5927\u95ee\u9898<\/li>\n
  6. \u9519\u8bef\u7528\u6cd5 - close()\u8c03\u7528\u4e86\u4e00\u4e2a\u6c38\u8fdc\u662fnull\u7684\u503c<\/li>\n
  7. \u9519\u8bef\u7528\u6cd5 - equals\u65b9\u6cd5\u4e00\u76f4\u8fd4\u56defalse\u6216\u8005true<\/li>\n
  8. \u9519\u8bef\u7528\u6cd5 - null\u503c\u4e00\u5b9a\u4f1a\u88ab\u8c03\u7528<\/li>\n
  9. \u9519\u8bef\u7528\u6cd5 - \u4e00\u4e2a\u5df2\u77e5\u7684null\u503c\u88ab\u68c0\u6d4b\u5b83\u662f\u5426\u662f\u4e00\u4e2a\u7c7b\u578b\u7684\u5b9e\u4f8b<\/li>\n
  10. \u9519\u8bef\u7528\u6cd5 - \u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4\u5143\u7d20\u65f6\u53d1\u751f\u7684\u7c7b\u578b\u8f6c\u6362\u9519\u8bef<\/li>\n<\/ol>\n

    <\/p>\n

    \u4e25\u91cd<\/h2>\n
      \n
    1. Switch\u8bed\u53e5\u4e2d\u4e00\u4e2acase\u5931\u8d25\u4ee5\u540e\u8fdb\u5165\u4e86\u4e0b\u4e00\u4e2acase
      \n\u5fd8\u8bb0break;<\/code>\u8bed\u53e5<\/li>\n
    2. switch\u8bed\u53e5\u5931\u8d25\u629b\u51fa\u5f02\u5e38\u5bfc\u81f4\u65e0\u7528\u7684\u5b58\u50a8
      \n\u5fd8\u8bb0break;<\/code>\u8bed\u53e5\uff0c\u5bfc\u81f4\u65e0\u7528\u7684\u5bf9\u8c61\u5b58\u50a8<\/p>\n
       String status = \"\";\n Switch(Type)\n case 1:\n     status = \"Hello Wolrd\";\n case 2:\n     status = \"Hello new Wolrd\";\n<\/code><\/pre>\n<\/li>\n
    3. volatile\u7684\u81ea\u589e\u64cd\u4f5c\u4e0d\u662f\u539f\u5b50\u7684
      \njava\u8bed\u8a00\u4e2d++<\/code>,--<\/code>\u90fd\u4e0d\u662f\u539f\u5b50\u64cd\u4f5c\uff0c\u5982\u679c\u6709\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u64cd\u4f5c\u8be5\u53d8\u91cf\uff0c\u4f1a\u6709\u95ee\u9898<\/li>\n
    4. \u4e0d\u826f\u5b9e\u8df5 - \u6000\u7591\u8fdb\u884c\u4e86\u5f15\u7528\u6bd4\u8f83==<\/code>
      \n==<\/code>\u7528\u4e8e\u7b80\u5355\u6570\u636e\u7684\u6bd4\u8f83\uff1b\u5982\u679c\u7528\u4e8e\u5bf9\u8c61\uff0c\u5176\u5b9e\u6bd4\u8f83\u7684\u662f\u5bf9\u8c61\u7684\u5185\u5b58\u5730\u5740\u3002<\/li>\n
    5. \u4e0d\u8981catch Throwable
      \nThrowable<\/code>\u662f\u6240\u4ee5\u9519\u8bef\u7c7b\u7684\u57fa\u7c7b\uff0cException<\/code>\u662f\u6240\u6709\u5f02\u5e38\u7c7b\u7684\u57fa\u7c7b\uff0c\u5141\u8bb8catch Exception\uff0c\u4f46\u662f\u4e0d\u5141\u8bb8\u6355\u83b7Throwable<\/code>\uff0c\u5426\u5219\u8fdeoom\u8fd9\u79cd\u9519\u8bef\u90fd\u4e0d\u4f1a\u629b\u51fa\u3002<\/li>\n
    6. \u4f7f\u7528\u9519\u8bef - \u4f7f\u7528equals()\u6bd4\u8f83\u4e0d\u540c\u7c7b\u578b<\/li>\n
    7. \u6027\u80fd - keySet\u8fed\u4ee3\u662f\u4f4e\u6548\u7684\uff0c\u4f7f\u7528entrySet\u4ee3\u66ff
      \nentrySet\u904d\u5386\u65b9\u5f0f\u83b7\u53d6Value\u5bf9\u8c61\u662f\u76f4\u63a5\u4eceEntry\u5bf9\u8c61\u4e2d\u76f4\u63a5\u83b7\u5f97\uff0c\u65f6\u95f4\u590d\u6742\u5ea6T(n)=o(1);
      \nkeySet\u904d\u5386\u83b7\u53d6Value\u5bf9\u8c61\u5219\u8981\u4eceMap\u4e2d\u91cd\u65b0\u83b7\u53d6\uff0c\u65f6\u95f4\u590d\u6742\u5ea6T(n)=o(n)<\/li>\n
    8. \u6027\u80fd - \u65b9\u6cd5\u5728\u5faa\u73af\u4e2d\u4f7f\u7528+\u8fdb\u884c\u5b57\u7b26\u4e32\u62fc\u63a5
      \n\u5b57\u7b26\u4e32String\uff0c\u5b9e\u5728\u5185\u5b58\u4e2d\u65b0\u5f00\u8f9f\u7a7a\u95f4\u5b58\u50a8\u3002\u63a8\u8350\u4f7f\u7528StringBuilder<\/code>\u7c7b\u3002<\/li>\n
    9. \u65e0\u6761\u4ef6\u7684if\u8bed\u53e5
      \nif(true)<\/code>\u6216\u8005if(false)<\/code>\u7684\u60c5\u51b5<\/li>\n
    10. \u7834\u574f\u7684null\u68c0\u6d4b if(null==name || name.equals(\"Tom\"))<\/code><\/li>\n
    11. \u9ad8\u5371 - \u901a\u8fc7\u4e00\u4e2a\u5b9e\u4f8b\u65b9\u6cd5\u66f4\u65b0\u9759\u6001\u5c5e\u6027<\/li>\n
    12. \u9519\u8bef\u7528\u6cd5 - \u8c03\u7528\u4e86null\u6307\u9488<\/li>\n
    13. \u9ad8\u5371 - \u5728\u4e24\u4e2aswitch\u8bed\u53e5\u6216\u8005\u5206\u652f\u4e2d\u4f7f\u7528\u4e86\u76f8\u540c\u7684\u4ee3\u7801<\/li>\n
    14. \u9ad8\u5371 - \u5bf9\u4e00\u4e2a\u5df2\u77e5\u4e0d\u662fnull\u7684\u503c\u91cd\u590d\u8fdb\u884c\u7a7a\u503c\u5224\u65ad<\/li>\n
    15. \u9ad8\u5371 - \u6ca1\u6709\u5224\u65adreadLine()\u7684\u7ed3\u679c\u662f\u5426\u4e3a\u7a7a<\/li>\n
    16. \u9ad8\u5371 - \u672a\u7528\u7684\u5c40\u90e8\u53d8\u91cf<\/li>\n
    17. \u591a\u7ebf\u7a0b\u9519\u8bef - \u540c\u6b65static String\u53ef\u80fd\u5bfc\u81f4\u6b7b\u9501\n
      private static String username = \"Hello world\";\n\npublic void doSomeThing()\n{\n    synchronized(username)\n    {\n    ...\n    }\n}\n<\/code><\/pre>\n<\/li>\n
    18. \u9519\u8bef\u7528\u6cd5 - \u53ef\u80fd\u51fa\u73b0\u7a7a\u6307\u9488\u5f15\u7528<\/li>\n
    19. \u6027\u80fd - \u5de8\u5927\u7684\u5b57\u7b26\u4e32\u5e38\u91cf\u5728\u591a\u4e2a\u7c7b\u6587\u4ef6\u4e2d\u95f4\u91cd\u590d\u4e86<\/li>\n
    20. \u9ad8\u5371 - \u8c03\u7528substring(0)\u4f1a\u8fd4\u56de\u539f\u503c<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
      \u963b\u585e \u4e0d\u53ef\u80fd\u7684\u8f6c\u6362 \u4f7f\u7528equals()\u65b9\u6cd5\u6bd4\u8f83\u7c7b\u578b\u4e0d\u901a\u7684\u6570\u7ec4 \u786c\u7f16\u7801\u4e86\u6570\u636e\u5e93\u5bc6\u7801 \u6027\u80fd – URL\u7684equals \u548c hashCode \u65b9\u6cd5\u4f1a\u88ab\u5835\u585e http:\/\/michaelscharf.blo...<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[34],"tags":[43,41],"class_list":["post-1118","post","type-post","status-publish","format-standard","hentry","category-software","tag-android","tag-41"],"views":3043,"_links":{"self":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/1118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1118"}],"version-history":[{"count":1,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/1118\/revisions"}],"predecessor-version":[{"id":1119,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/1118\/revisions\/1119"}],"wp:attachment":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}