{"id":39208,"date":"2024-11-26T09:12:49","date_gmt":"2024-11-26T01:12:49","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39208\/"},"modified":"2024-11-26T09:12:49","modified_gmt":"2024-11-26T01:12:49","slug":"java%e4%b8%ad-%e6%95%b0%e7%bb%84%e8%bf%94%e5%9b%9e%e5%80%bc%e6%80%8e%e4%b9%88%e8%a7%a3%e5%86%b3","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39208\/","title":{"rendered":"java\u4e2d \u6570\u7ec4\u8fd4\u56de\u503c\u600e\u4e48\u89e3\u51b3"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\u89e3\u51b3\u6570\u7ec4\u8fd4\u56de\u503c\u95ee\u9898\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528\u5305\u88c5\u7c7b\u5c06\u6570\u7ec4\u5305\u88c5\u6210\u5bf9\u8c61\u8fd4\u56de object \u6570\u7ec4\u5b58\u50a8\u5404\u79cd\u6570\u636e\u4f7f\u7528\u6cdb\u578b\u6570\u7ec4\u6307\u5b9a\u8fd4\u56de\u503c\u7c7b\u578b\u8fd4\u56de arraylist \u5bf9\u8c61\u4f5c\u4e3a\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/16\/2024111605205459508.jpg\" class=\"aligncenter\" title=\"java\u4e2d \u6570\u7ec4\u8fd4\u56de\u503c\u600e\u4e48\u89e3\u51b3\u63d2\u56fe\" alt=\"java\u4e2d \u6570\u7ec4\u8fd4\u56de\u503c\u600e\u4e48\u89e3\u51b3\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u89e3\u51b3\u6570\u7ec4\u8fd4\u56de\u503c<\/strong><\/p>\n<p>\u5f53\u9700\u8981\u5728 Java \u65b9\u6cd5\u4e2d\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\u65f6\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\uff1a\u6570\u7ec4\u65e0\u6cd5\u76f4\u63a5\u4f5c\u4e3a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<p>\u6709\u4ee5\u4e0b\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>1. \u4f7f\u7528\u5305\u88c5\u7c7b\uff1a<\/strong><\/p>\n<p>Java \u63d0\u4f9b\u4e86\u6570\u7ec4\u7684\u5305\u88c5\u7c7b\uff0c\u5982 Integer[]\u3001Double[] \u7b49\u3002\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u7c7b\u5c06\u6570\u7ec4\u5305\u88c5\u6210\u5bf9\u8c61\uff0c\u7136\u540e\u4f5c\u4e3a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002<\/p>\n<pre>public Integer[] getIntArray() {\n    return new Integer[] {1, 2, 3};\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u8fd4\u56de Object \u6570\u7ec4\uff1a<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 Object[] \u6570\u7ec4\u6765\u5b58\u50a8\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u5176\u4ed6\u6570\u7ec4\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u5c06 Object[] \u6570\u7ec4\u4f5c\u4e3a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002<\/p>\n<pre>public Object[] getMixedArray() {\n    return new Object[] {\"Hello\", 10, new int[] {1, 2, 3}};\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528\u6cdb\u578b\uff1a<\/strong><\/p>\n<p>Java 5 \u53ca\u66f4\u9ad8\u7248\u672c\u652f\u6301\u6cdb\u578b\uff0c\u5141\u8bb8\u5728\u65b9\u6cd5\u7b7e\u540d\u4e2d\u6307\u5b9a\u8fd4\u56de\u503c\u7c7b\u578b\u3002\u6cdb\u578b\u6570\u7ec4\u53ef\u4ee5\u7528\u6765\u89e3\u51b3\u6570\u7ec4\u8fd4\u56de\u503c\u7684\u95ee\u9898\u3002<\/p>\n<pre>public &lt;T&gt; T[] getArray(T[] array) {\n    return array;\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u4f7f\u7528\u5217\u8868\uff1a<\/strong><\/p>\n<p>Java \u7684 ArrayList \u7c7b\u6269\u5c55\u81ea List \u63a5\u53e3\uff0c\u63d0\u4f9b\u4e86\u4e00\u4e2a\u53ef\u53d8\u957f\u5ea6\u7684\u6570\u7ec4\u5b9e\u73b0\u3002\u53ef\u4ee5\u5728\u65b9\u6cd5\u4e2d\u8fd4\u56de ArrayList \u5bf9\u8c61\u3002<\/p>\n<pre>public ArrayList&lt;Integer&gt; getArrayList() {\n    ArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;();\n    list.add(1);\n    list.add(2);\n    list.add(3);\n    return list;\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6700\u4f73\u5b9e\u8df5\uff1a<\/strong><\/p>\n<ul>\n<li>\u5bf9\u4e8e\u5305\u542b\u57fa\u672c\u7c7b\u578b\u503c\u7684\u7b80\u5355\u6570\u7ec4\uff0c\u5efa\u8bae\u4f7f\u7528\u5305\u88c5\u7c7b\u3002<\/li>\n<li>\u5bf9\u4e8e\u5305\u542b\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u7684\u590d\u6742\u6570\u7ec4\uff0c\u4f7f\u7528 Object[] \u6570\u7ec4\u66f4\u7075\u6d3b\u3002<\/li>\n<li>\u5982\u679c\u9700\u8981\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\u7c7b\u578b\u7684\u901a\u7528\u65b9\u6cd5\uff0c\u5efa\u8bae\u4f7f\u7528\u6cdb\u578b\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d \u6570\u7ec4\u8fd4\u56de\u503c\u600e\u4e48\u89e3\u51b3\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 java \u4e2d\u89e3\u51b3\u6570\u7ec4\u8fd4\u56de\u503c\u95ee\u9898\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528\u5305\u88c5\u7c7b\u5c06\u6570\u7ec4\u5305\u88c5\u6210\u5bf9\u8c61\u8fd4\u56de object \u6570\u7ec4\u5b58\u50a8\u5404\u79cd\u6570\u636e\u4f7f\u7528\u6cdb\u578b\u6570\u7ec4\u6307\u5b9a\u8fd4\u56de\u503c\u7c7b\u578b\u8fd4\u56de arraylist \u5bf9\u8c61\u4f5c\u4e3a\u53ef\u53d8\u957f\u5ea6\u6570\u7ec4 \u5982\u4f55\u5728 Java \u4e2d\u89e3\u51b3\u6570\u7ec4\u8fd4\u56de\u503c \u5f53\u9700\u8981\u5728 Java \u65b9\u6cd5\u4e2d\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\u65f6\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\uff1a\u6570\u7ec4\u65e0\u6cd5\u76f4\u63a5\u4f5c\u4e3a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002 \u89e3\u51b3\u65b9\u6848\uff1a \u6709\u4ee5\u4e0b\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b 1. \u4f7f\u7528\u5305\u88c5\u7c7b\uff1a Java \u63d0\u4f9b\u4e86\u6570\u7ec4\u7684\u5305\u88c5\u7c7b\uff0c\u5982 Integer[]\u3001Double[] \u7b49\u3002\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u7c7b\u5c06\u6570\u7ec4\u5305\u88c5\u6210\u5bf9\u8c61\uff0c\u7136\u540e\u4f5c\u4e3a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002 public Integer[] getIntArray() { return new Integer[] {1, 2, 3}; } \u767b\u5f55\u540e\u590d\u5236 2. \u8fd4\u56de Object \u6570\u7ec4\uff1a \u53ef\u4ee5\u4f7f\u7528 Object[] \u6570\u7ec4\u6765\u5b58\u50a8\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u5176\u4ed6\u6570\u7ec4\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u5c06 Object[] \u6570\u7ec4\u4f5c\u4e3a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u3002 public Object[] getMixedArray() { return new Object[] {&#8220;Hello&#8221;, 10, new int[] {1, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-39208","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39208","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=39208"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39208\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39208"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}