{"id":50682,"date":"2023-11-18T07:19:32","date_gmt":"2023-01-07T18:47:13","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e5%88%a0%e9%99%a4%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0\/"},"modified":"2024-05-04T09:38:43","modified_gmt":"2024-05-04T01:38:43","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e5%88%a0%e9%99%a4%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e5%88%a0%e9%99%a4%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0\/","title":{"rendered":"\u5982\u4f55\u5728Java\u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20"},"content":{"rendered":"<p>\u5728Java\u4e2d\u521b\u5efa\u6570\u7ec4\u65f6\uff0c\u6211\u4eec\u8981\u6307\u5b9a\u5176\u6570\u636e\u7c7b\u578b\u548c\u5927\u5c0f\u3002\u8fd9\u7531JVM\u7528\u4e8e\u4e3a\u6570\u7ec4\u5143\u7d20\u5206\u914d\u5fc5\u8981\u7684\u5185\u5b58\u3002\u6570\u7ec4\u4e2d\u6ca1\u6709\u7279\u5b9a\u7684\u65b9\u6cd5\u7528\u4e8e\u79fb\u9664\u5143\u7d20\u3002<\/p>\n<h2>\u4f7f\u7528for\u5faa\u73af\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u4e00\u4e2a\u5143\u7d20\u3002<\/h2>\n<p>\u8fd9\u4e2a\u65b9\u6cd5\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u5c06\u65b0\u6570\u7ec4\u586b\u5145\uff0c\u4f46\u4e0d\u5305\u62ec\u6211\u4eec\u60f3\u8981\u79fb\u9664\u7684\u5143\u7d20\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">package<\/span> <span class=\"token namespace\">com<span class=\"token punctuation\">.<\/span>journaldev<span class=\"token punctuation\">.<\/span>java<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Arrays<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/span> <span class=\"token punctuation\">{<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> arr_new <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span>arr<span class=\"token punctuation\">.<\/span>length<span class=\"token operator\">-<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">int<\/span> j<span class=\"token operator\">=<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> k<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;<\/span>arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token operator\">!=<\/span>j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n                arr_new<span class=\"token punctuation\">[<\/span>k<span class=\"token punctuation\">]<\/span><span class=\"token operator\">=<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n                k<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Before deletion :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"After deletion :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr_new<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564850fa4b2f92e6c7305fd\/4-0.png\" alt=\"Arr Delete\" \/><\/div>\n<p>\u8be5\u4ee3\u7801\u5220\u9664\u7d22\u5f15\u4e3a3\u7684\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u4ec5\u5c06\u9664\u7d22\u5f15\u4e3a3\u7684\u5143\u7d20\u5916\u7684\u6240\u6709\u5143\u7d20\u590d\u5236\u5230\u4e00\u4e2a\u65b0\u6570\u7ec4\u4e2d\u3002<\/p>\n<h2>\u901a\u8fc7\u503c\u5220\u9664\u6570\u7ec4\u5143\u7d20\u3002<\/h2>\n<p>\u4e0d\u540c\u4e8e\u524d\u4e00\u4e2a\u60c5\u51b5\uff0c\u8fd9\u6bb5\u4ee3\u7801\u5c06\u6839\u636e\u5143\u7d20\u7684\u503c\u6765\u5220\u9664\u8be5\u5143\u7d20\u3002\u7531\u4e8e\u5220\u9664\u540e\u6570\u7ec4\u7684\u5927\u5c0f\u5fc5\u987b\u662f\u5df2\u77e5\u7684\uff0c\u6240\u4ee5\u65e0\u6cd5\u5904\u7406\u91cd\u590d\u5143\u7d20\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">package<\/span> <span class=\"token namespace\">com<span class=\"token punctuation\">.<\/span>journaldev<span class=\"token punctuation\">.<\/span>java<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Arrays<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/span> <span class=\"token punctuation\">{<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> arr_new <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span>arr<span class=\"token punctuation\">.<\/span>length<span class=\"token operator\">-<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">int<\/span> j<span class=\"token operator\">=<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> k<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;<\/span>arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">!=<\/span>j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n                arr_new<span class=\"token punctuation\">[<\/span>k<span class=\"token punctuation\">]<\/span><span class=\"token operator\">=<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n                k<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Before deletion :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"After deletion :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr_new<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564850fa4b2f92e6c7305fd\/9-0.png\" alt=\"Arr Delete based on value\" \/><\/div>\n<p>\u8fd9\u4e0e\u4e4b\u524d\u7684\u60c5\u51b5\u552f\u4e00\u7684\u533a\u522b\u662f\uff0cif\u6761\u4ef6\u4e2d\u7684i!=j\u88ab\u66ff\u6362\u4e3aarr[i]!=j\u3002<\/p>\n<h2>3. \u5f53\u6570\u7ec4\u5305\u542b\u91cd\u590d\u5143\u7d20\u65f6\uff0c\u901a\u8fc7\u5176\u503c\u5220\u9664\u5143\u7d20\u3002<\/h2>\n<p>\u5728\u91cd\u590d\u60c5\u51b5\u4e0b\uff0c\u6839\u636e\u503c\u6267\u884c\u5220\u9664\u9700\u8981\u4f7f\u7528ArrayList\u3002\u7531\u4e8eArrayList\u4e0d\u9700\u8981\u63d0\u524d\u786e\u5b9a\u5927\u5c0f\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u52a8\u6001\u6269\u5c55\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">package<\/span> <span class=\"token namespace\">com<span class=\"token punctuation\">.<\/span>journaldev<span class=\"token punctuation\">.<\/span>java<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">ArrayList<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Arrays<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/span> <span class=\"token punctuation\">{<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> arr_new <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">int<\/span> j<span class=\"token operator\">=<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">&lt;<\/span>arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span>i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">!=<\/span>j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n                arr_new<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n            <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Before deletion :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"After deletion :\"<\/span> <span class=\"token operator\">+<\/span>arr_new<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564850fa4b2f92e6c7305fd\/14-0.png\" alt=\"array-deletion-duplicates\" \/><\/div>\n<h2>4. \u540c\u4e00\u4e2a\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u8f6c\u79fb\u4f4d\u7f6e<\/h2>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u6d89\u53ca\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u79fb\u52a8\u3002\u5143\u7d20\u7684\u79fb\u52a8\u662f\u901a\u8fc7\u5c06\u8981\u5220\u9664\u7684\u5143\u7d20\u66ff\u6362\u4e3a\u4e0b\u4e00\u7d22\u5f15\u4f4d\u7f6e\u7684\u5143\u7d20\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">package<\/span> <span class=\"token namespace\">com<span class=\"token punctuation\">.<\/span>journaldev<span class=\"token punctuation\">.<\/span>java<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Arrays<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/span> <span class=\"token punctuation\">{<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">int<\/span> j<span class=\"token operator\">=<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Before deletion :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">==<\/span> j<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n                count<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n                <span class=\"token comment\">\/\/ shifting elements<\/span>\r\n                <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> k <span class=\"token operator\">=<\/span> i<span class=\"token punctuation\">;<\/span> k <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length <span class=\"token operator\">-<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> k<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n                    arr<span class=\"token punctuation\">[<\/span>k<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> arr<span class=\"token punctuation\">[<\/span>k<span class=\"token operator\">+<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n                <span class=\"token punctuation\">}<\/span>\r\n                i<span class=\"token operator\">--<\/span><span class=\"token punctuation\">;<\/span>\r\n               <span class=\"token comment\">\/\/ break;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"After Deletion :\"<\/span> <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length<span class=\"token operator\">-<\/span>count<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\" \"<\/span> <span class=\"token operator\">+<\/span> arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Whole array :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8ba1\u6570\u53d8\u91cf\u8868\u793a\u5df2\u5220\u9664\u7684\u5143\u7d20\u6570\u91cf\u3002\u8fd9\u4e2a\u53d8\u91cf\u5bf9\u4e8e\u8ddf\u8e2a\u6570\u7ec4\u5e94\u8be5\u6253\u5370\u5230\u54ea\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e5f\u4f1a\u5904\u7406\u91cd\u590d\u5143\u7d20\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564850fa4b2f92e6c7305fd\/19-0.png\" alt=\"Shifting Elements In Array\" \/><\/div>\n<h2>\u4eceArrayList\u4e2d\u5220\u9664\u5143\u7d20<\/h2>\n<p>ArrayList\u662f\u7531\u6570\u7ec4\u652f\u6301\u7684\u3002\u5728ArrayList\u4e2d\u5220\u9664\u4e00\u4e2a\u5143\u7d20\u975e\u5e38\u76f4\u63a5\u3002\u5b83\u53ea\u9700\u8981\u8c03\u7528\u4e00\u4e2a\u5185\u7f6e\u51fd\u6570\u5373\u53ef\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">package<\/span> <span class=\"token namespace\">com<span class=\"token punctuation\">.<\/span>journaldev<span class=\"token punctuation\">.<\/span>java<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">ArrayList<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Arrays<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/span> <span class=\"token punctuation\">{<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token keyword\">int<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> arr_new <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">:<\/span> arr<span class=\"token punctuation\">)<\/span>\r\n        <span class=\"token punctuation\">{<\/span>\r\n            arr_new<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token punctuation\">}<\/span>\r\n        arr_new<span class=\"token punctuation\">.<\/span><span class=\"token function\">remove<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Before deletion :\"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"After Deletion:\"<\/span> <span class=\"token operator\">+<\/span> arr_new<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8c03\u7528remove(i)\u51fd\u6570\u5c06\u4ece\u7d22\u5f15i\u5904\u5220\u9664\u5143\u7d20\u3002\u4e0e\u6570\u7ec4\u76f8\u6bd4\uff0cArrayList\u4e2d\u7684\u5220\u9664\u64cd\u4f5c\u76f8\u5bf9\u8f83\u5bb9\u6613\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564850fa4b2f92e6c7305fd\/24-0.png\" alt=\"ArrayList Deletion\" \/><\/div>\n<h2>\u7ed3\u8bba<\/h2>\n<p>\u6211\u4eec\u770b\u5230\u4e86\u4f7f\u7528\u4e0d\u540c\u65b9\u6cd5\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u4e00\u4e9b\u4f8b\u5b50\u3002\u6570\u7ec4\u548c\u6570\u7ec4\u5217\u8868\u4e2d\u5143\u7d20\u5220\u9664\u7684\u533a\u522b\u663e\u800c\u6613\u89c1\u3002\u5982\u679c\u9700\u8981\u53cd\u590d\u8fdb\u884c\u5220\u9664\u64cd\u4f5c\uff0c\u90a3\u4e48\u5e94\u8be5\u4f7f\u7528\u6570\u7ec4\u5217\u8868\u4ee5\u4fbf\u4ece\u5176\u5185\u7f6e\u51fd\u6570\u4e2d\u83b7\u76ca\u3002\u5bf9\u4e8e\u5143\u7d20\u7684\u6dfb\u52a0\u4e5f\u662f\u5982\u6b64\u3002\u7531\u4e8e\u5176\u52a8\u6001\u6027\uff0c\u6570\u7ec4\u5217\u8868\u63d0\u4f9b\u4e86\u66f4\u7b80\u5355\u548c\u4e0d\u90a3\u4e48\u7e41\u7410\u7684\u65b9\u5f0f\u6765\u4fee\u6539\u6570\u7ec4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Java\u4e2d\u521b\u5efa\u6570\u7ec4\u65f6\uff0c\u6211\u4eec\u8981\u6307\u5b9a\u5176\u6570\u636e\u7c7b\u578b\u548c\u5927\u5c0f\u3002\u8fd9\u7531JVM\u7528\u4e8e\u4e3a\u6570\u7ec4\u5143\u7d20\u5206\u914d\u5fc5\u8981\u7684\u5185\u5b58\u3002\u6570\u7ec4\u4e2d\u6ca1\u6709\u7279\u5b9a\u7684\u65b9 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50682","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u5728Java\u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5982\u4f55\u5728java\u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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