{"id":108,"date":"2025-07-10T14:34:58","date_gmt":"2025-07-10T06:34:58","guid":{"rendered":"http:\/\/192.140.166.102\/?p=108"},"modified":"2025-07-10T23:35:14","modified_gmt":"2025-07-10T15:35:14","slug":"java%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/lsuccess.xyz\/index.php\/2025\/07\/10\/java%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84%e6%93%8d%e4%bd%9c\/","title":{"rendered":"JAVA\u6570\u636e\u7ed3\u6784\u64cd\u4f5c"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li>\u6570\u7ec4   \u6570\u636e\u7c7b\u578b + []<\/li>\n\n\n\n<li>\u96c6\u5408\u4e0b\u4e24\u5927\u63a5\u53e3 List\u4e0eMap<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Array<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JAVA\u4e2d\u7684\u6570\u7ec4\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u8fd9\u610f\u5473\u7740\u6211\u4eec\u5728\u521b\u5efa\u6570\u7ec4\u7684\u65f6\u5019\u5c31\u4e00\u5b9a\u8981\u6307\u5b9a\u597d\u6570\u7ec4\u7684\u5927\u5c0f\uff0c\u58f0\u660e\u65b9\u5f0f\u5982\u4e0b\uff0c\u6b64\u5916\uff0c\u5982\u679c\u6709python\u57fa\u7840\uff0c\u8bb0\u4f4f{}\u5728Java\u4e2d\u624d\u662f\u6570\u7ec4\uff0c[]\u5df2\u7ecf\u662f\u5217\u8868\u4e86<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int&#91;] a = new int&#91;10];\/\/\u58f0\u660e\u5927\u5c0f\u4e3a10\u7684\u6570\u7ec4\nint&#91;]&#91;] b = new int&#91;]{{1,2,3},{2,3,4}}\/\/\u58f0\u660e\u7684\u540c\u65f6\u521d\u59cb\u5316<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u5728python\u4e2d\u6570\u7ec4\u4e5f\u5c31\u662f\u5217\u8868\uff0c\u5728python\u4e2d\u662f\u53ef\u53d8\u7684\uff0c\u5343\u4e07\u4e0d\u8981\u641e\u6df7\uff0c\u5982\u679c\u4e0d\u5728\u58f0\u660e\u7684\u65f6\u5019\u8fdb\u884c\u521d\u59cb\u5316\u7684\u8bdd\uff0c\u6211\u4eec\u5c31\u5f97\u901a\u8fc7\u8fed\u4ee3\u5668\u548c\u5faa\u73af\u5b8c\u6210\u521d\u59cb\u5316\u4e86\uff08\u8fd9\u91cc\u4e4b\u540e\u52a0\u5165\u4e00\u4e2a\u94fe\u63a5\uff09\uff0c\u7ecf\u5e38\u4f1a\u641e\u6df7\u7684\u5c31\u662f\u5bf9Java\u4e2d\u7684\u6570\u7ec4\u4f7f\u7528add\u65b9\u6cd5\uff0c\u5982\u679c\u4f60\u6709\u5b66\u4e60\u8fc7python\u7684\u8bdd\uff0c\u5982\u679c\u6211\u4eec\u8981\u5bf9\u6570\u7ec4\u8fdb\u884c\u64cd\u4f5c\u7684\u8bdd\uff0c\u5c31\u5f97\u4f7f\u7528Arrays\u5de5\u5177\u7c7b\uff0c\u5e38\u7528\u7684\u65b9\u6cd5\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-table alignleft\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5\u540d<\/th><th>\u529f\u80fd<\/th><th>\u793a\u4f8b<\/th><th>\u5e38\u89c1\u573a\u666f<\/th><\/tr><\/thead><tbody><tr><td><code>Arrays.sort()<\/code><\/td><td>\u6570\u7ec4\u6392\u5e8f\uff08\u9ed8\u8ba4\u5347\u5e8f\uff09<\/td><td><code>Arrays.sort(nums);<\/code><\/td><td>\u6392\u5e8f\u540e\u53cc\u6307\u9488\u3001\u524d\u7f00\u548c\u7b49\u9898<\/td><\/tr><tr><td><code>Arrays.sort(nums, Collections.reverseOrder())<\/code><\/td><td>\u964d\u5e8f\u6392\u5e8f\uff08\u9700\u8981\u5305\u88c5\u7c7b\uff09<\/td><td><code>Integer[] arr = ...; Arrays.sort(arr, Collections.reverseOrder());<\/code><\/td><td>\u6392\u5e8f\u9898\u4e2d\u7684\u964d\u5e8f\u5904\u7406<\/td><\/tr><tr><td><code>Arrays.copyOf(arr, newLength)<\/code><\/td><td>\u590d\u5236\u6570\u7ec4\uff08\u53ef\u6269\u5c55\/\u622a\u65ad\uff09<\/td><td><code>int[] b = Arrays.copyOf(a, 5);<\/code><\/td><td>\u62f7\u8d1d\u524d k \u4e2a\u5143\u7d20<\/td><\/tr><tr><td><code>Arrays.copyOfRange(arr, from, to)<\/code><\/td><td>\u590d\u5236\u5b50\u6570\u7ec4\uff08\u533a\u95f4 <code>[from, to)<\/code>\uff09<\/td><td><code>int[] sub = Arrays.copyOfRange(a, 1, 4);<\/code><\/td><td>\u5b50\u6570\u7ec4\u5904\u7406<\/td><\/tr><tr><td><code>Arrays.equals(a, b)<\/code><\/td><td>\u6bd4\u8f83\u4e24\u4e2a\u6570\u7ec4\u662f\u5426\u5143\u7d20\u4e00\u81f4<\/td><td><code>Arrays.equals(a, b)<\/code><\/td><td>\u5224\u65ad\u4e24\u4e2a\u7ed3\u679c\u662f\u5426\u4e00\u6837<\/td><\/tr><tr><td><code>Arrays.fill(arr, val)<\/code><\/td><td>\u5c06\u6574\u4e2a\u6570\u7ec4\u586b\u5145\u4e3a\u67d0\u503c<\/td><td><code>Arrays.fill(dp, -1);<\/code><\/td><td>\u521d\u59cb\u5316 dp \u6570\u7ec4<\/td><\/tr><tr><td><code>Arrays.toString(arr)<\/code><\/td><td>\u6570\u7ec4\u8f6c\u5b57\u7b26\u4e32\u6253\u5370<\/td><td><code>System.out.println(Arrays.toString(arr));<\/code><\/td><td>\u8c03\u8bd5\u8f93\u51fa<\/td><\/tr><tr><td><code>Arrays.asList(...)<\/code><\/td><td>\u628a\u4e00\u7ec4\u5143\u7d20\u8f6c\u4e3a <code>List<\/code><\/td><td><code>Arrays.asList(1, 2, 3)<\/code>,\u5982\u679c\u8981\u4f20\u5165\u6570\u7ec4\uff0c\u5fc5\u987b\u5f97\u662f\u5305\u88c5\u7c7b\u578b<\/td><td>\u5feb\u901f\u6784\u9020\u5217\u8868<\/td><\/tr><tr><td><code>Arrays.binarySearch(arr, key)<\/code><\/td><td>\u5728\u6709\u5e8f\u6570\u7ec4\u4e2d\u4e8c\u5206\u67e5\u627e<\/td><td><code>int i = Arrays.binarySearch(a, x);<\/code><\/td><td>\u6709\u5e8f\u6570\u7ec4\u67e5\u627e\u76ee\u6807\u503c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u96c6\u5408<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u96c6\u5408\u4e0b\u7684List\u63a5\u53e3,List\u4e5f\u88ab\u79f0\u4e3a\u5217\u8868<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">List\u53ea\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u6709\u597d\u51e0\u4e2a\u5e38\u7528\u7684\u5b9e\u73b0\u7c7b\uff0c\u5177\u4f53\u5982\u4e0b\uff0c\uff08\u4e4b\u540e\u53ef\u80fd\u4f1a\u8fdb\u884c\u8865\u5145\uff09<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>               \u5b9e\u73b0\u7c7b<\/td><td>                    \u7279\u70b9<\/td><td>                   \u9002\u7528\u73af\u5883<\/td><\/tr><tr><td>ArrayList<\/td><td>\u5e95\u5c42\u5b9e\u73b0\u662f\u6570\u7ec4\uff0c\u4e5f\u5c31\u662f\u610f\u5473\u7740\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0b\u6807\u8bbf\u95ee\u503c\uff0c\u5e76\u4e14\u5177\u6709\u81ea\u52a8\u6269\u5bb9\u7684\u529f\u80fd\uff08python\u54c8\u54c8\uff09<\/td><td>\u9891\u7e41\u8bbf\u95ee\u6570\u636e\u7684\u60c5\u51b5\uff0c\u4f46\u5982\u679c\u4f60\u8981\u9891\u7e41\u5220\u9664\u548c\u6dfb\u52a0\u7684\u8bdd\uff0c\u662f\u6bd4\u4e0d\u8fc7LinkedList\uff08\u94fe\u8868\u548c\u6570\u7ec4\u7684\u533a\u522b\uff09<\/td><\/tr><tr><td>LinkedList<\/td><td>\u5e95\u5c42\u662f\u94fe\u8868\uff0c\u540c\u65f6\u6211\u4eec\u4e5f\u53ef\u4ee5\u7528\u8fd9\u4e2a\u6765\u58f0\u660e\u6808\u548c\u961f\u5217<\/td><td>\u9891\u7e41\u5220\u9664\u7684\u60c5\u51b5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4ee5\u4e0b\u662f\u6700\u8fd1\u5237\u9898\u8fc7\u7a0b\u4e2d\u8fdb\u7a0b\u4f7f\u7528\u5230\u7684\u65b9\u6cd5\nList&lt;> a =new ArrayList&lt;>(); \/\/\u58f0\u660e\u8fd9\u4e00\u5757\na.add(i);\na.get(i);\na.set(i,a.get(i)+1);\/\/\u5b9e\u73b0\u81ea\u589e\na.isEmpty();\na.toArray();\na.size();\na.remove();\na.contains();<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8981\u590d\u4e60\u8fd9\u4e2a\u90e8\u5206\u7684\u8bdd\uff0c\u53ef\u4ee5\u4ece\u589e\u5220\u6539\u67e5\u8fd9\u51e0\u4e2a\u65b9\u9762\u5f00\u59cb\u8054\u60f3<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u96c6\u5408\u4e0b\u7684Set\u63a5\u53e3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u4f5c\u4e3aset\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u54c8\u5e0c\u8868<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Array JAVA\u4e2d\u7684\u6570\u7ec4\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u8fd9\u610f\u5473\u7740\u6211\u4eec\u5728\u521b\u5efa\u6570\u7ec4\u7684\u65f6\u5019\u5c31\u4e00\u5b9a\u8981\u6307\u5b9a\u597d\u6570\u7ec4\u7684\u5927\u5c0f\uff0c\u58f0\u660e\u65b9\u5f0f\u5982\u4e0b\uff0c\u6b64 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":112,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,1],"tags":[],"class_list":["post-108","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","category-learn"],"_links":{"self":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts\/108","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=108"}],"version-history":[{"count":3,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts\/108\/revisions"}],"predecessor-version":[{"id":115,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts\/108\/revisions\/115"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/media\/112"}],"wp:attachment":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}