{"id":47,"date":"2018-05-17T08:00:00","date_gmt":"2018-05-17T00:00:00","guid":{"rendered":"https:\/\/liqimore.com\/2018\/IBM-java-notes\/"},"modified":"2022-03-21T03:03:03","modified_gmt":"2022-03-20T19:03:03","slug":"ibm-java-notes","status":"publish","type":"post","link":"https:\/\/liqimore.com\/2018\/ibm-java-notes\/","title":{"rendered":"IBM\u7684java\u7cfb\u5217\u6559\u7a0b\u7b14\u8bb0"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"\u8fed\u4ee3\u6cdb\u578b\">\u8fed\u4ee3\u6cdb\u578b<\/h2>\n\n\n\n<p>\u6cdb\u578b\u4f7f\u7528\u5904\u7406\u4e00\u4e9b\u5b9e\u4f53\uff08\u6bd4\u5982 List\uff09\u7684\u7279\u6b8a\u8bed\u6cd5\u589e\u5f3a\u4e86 Java \u8bed\u8a00\uff0c\u60a8\u901a\u5e38\u53ef\u80fd\u5e0c\u671b\u9010\u4e2a\u5143\u7d20\u5730\u5904\u7406\u8fd9\u4e9b\u5b9e\u4f53\u3002\u4e3e\u4f8b\u800c\u8a00\uff0c\u5982\u679c\u60f3\u8fed\u4ee3 ArrayList\uff0c\u53ef\u4ee5\u5c06 \u6e05\u5355 3 \u4e2d\u7684\u4ee3\u7801\u91cd\u5199\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">private void processArrayList(ArrayList&lt;String> theList) {\n  for (String s : theList) {\n    String s = theList.get(aa);\n  }\n}<\/pre>\n\n\n\n<p>\u6b64\u8bed\u6cd5<mark>\u9002\u7528\u4e8e\u4efb\u4f55 Iterable\uff08\u5373\u5b9e\u73b0\u4e86 Iterable \u63a5\u53e3\uff09\u7684\u5bf9\u8c61\u7c7b\u578b<\/mark>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u4e00\u4e2a\u53c2\u6570\u5316\u7684-List\">\u4e00\u4e2a\u53c2\u6570\u5316\u7684 List<\/h2>\n\n\n\n<p>\u5728\u6cdb\u578b\u8bed\u6cd5\u4e2d\uff0c\u521b\u5efa List \u7684\u4ee3\u7801\u7c7b\u4f3c\u4e8e\uff1a<\/p>\n\n\n\n<p>List listReference = new concreteListClass();<br>E\uff08\u8868\u793a\u5143\u7d20\uff09\u662f\u6211\u4e4b\u524d\u63d0\u5230\u7684 \u201c\u4e1c\u897f\u201d\u3002concreteListClass \u662f JDK \u4e2d\u60a8\u5b9e\u4f8b\u5316\u7684\u7c7b\u3002\u8be5 JDK \u5305\u542b\u591a\u4e2a List \u5b9e\u73b0\uff0c\u4f46\u60a8\u4f7f\u7528\u4e86 ArrayList\u3002\u60a8\u53ef\u80fd\u770b\u5230\u7684\u6cdb\u578b\u7c7b\u7684\u53e6\u4e00\u79cd\u5f62\u5f0f\u662f Class\uff0c\u5176\u4e2d T \u8868\u793a\u7c7b\u578b\u3002<mark>\u5728 Java \u4ee3\u7801\u4e2d\u770b\u5230 E \u65f6\uff0c\u5b83\u901a\u5e38\u6307\u7684\u662f\u67d0\u79cd\u7c7b\u578b\u7684\u96c6\u5408\u3002\u5f53\u60a8\u770b\u5230 T \u65f6\uff0c\u5b83\u8868\u793a\u4e00\u4e2a\u53c2\u6570\u5316\u7684\u7c7b\u3002<\/mark><\/p>\n\n\n\n<p>\u6240\u4ee5\uff0c\u8981\u521b\u5efa\u4e00\u4e2a\u7531 java.lang.Integer \u7ec4\u6210\u7684 ArrayList\uff0c\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">List&lt;Integer> listOfIntegers = new ArrayList&lt;Integer>();<\/pre>\n\n\n\n<p><strong>\u539f\u6587\u5730\u5740<\/strong><br><a href=\"https:\/\/www.ibm.com\/developerworks\/cn\/java\/j-perry-generics\/index.html\">\u7b2c20\u5355\u5143:\u6cdb\u578b<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fed\u4ee3\u6cdb\u578b \u6cdb\u578b\u4f7f\u7528\u5904\u7406\u4e00\u4e9b\u5b9e\u4f53\uff08\u6bd4\u5982 List\uff09\u7684\u7279\u6b8a\u8bed\u6cd5\u589e\u5f3a\u4e86 Java \u8bed\u8a00\uff0c\u60a8\u901a\u5e38\u53ef\u80fd\u5e0c\u671b\u9010\u4e2a\u5143\u7d20\u5730\u5904\u7406 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,1],"tags":[],"class_list":["post-47","post","type-post","status-publish","format-standard","hentry","category-code","category-logged"],"_links":{"self":[{"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/posts\/47","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/comments?post=47"}],"version-history":[{"count":0,"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/posts\/47\/revisions"}],"wp:attachment":[{"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/media?parent=47"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/categories?post=47"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/liqimore.com\/wp-json\/wp\/v2\/tags?post=47"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}