{"id":544,"date":"2017-04-16T23:21:51","date_gmt":"2017-04-16T15:21:51","guid":{"rendered":"https:\/\/199604.com\/?p=544"},"modified":"2017-04-16T23:22:34","modified_gmt":"2017-04-16T15:22:34","slug":"arrays%e7%b1%bb%e5%b8%b8%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/199604.com\/544","title":{"rendered":"arrays\u7c7b\u5e38\u7528\u65b9\u6cd5"},"content":{"rendered":"

\u6700\u8fd1\u597d\u50cf\u505a\u4e86\u4e00\u4f4d\u9ad8\u4ea7\u7684\u5c0f\u535a\u4e3b~<\/p>\n

\n

java.util.Arrays\u662f\u9488\u5bf9\u6570\u7ec4\u7684\u5de5\u5177\u7c7b\uff0c\u53ef\u4ee5\u8fdb\u884c \u6392\u5e8f\uff0c\u67e5\u627e\uff0c\u590d\u5236\u586b\u5145\u7b49\u529f\u80fd\u3002 \u5927\u5927\u63d0\u9ad8\u4e86\u5f00\u53d1\u4eba\u5458\u7684\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n

\u4f46\u662f\u627e\u4e86\u4e00\u4e2a\u65b9\u6cd5\u5f88\u4e45\u90fd\u6ca1\u6709\u627e\u5230\u3002<\/p>\n

\u53ea\u80fd\u5728\u81ea\u5df1blog\u8bb0\u5f55\u4e00\u4e0b,\u8fd9\u624d\u80fd\u662f\u8bb0\u5fc6\u7684\u89d2\u843d\u561b\u3002<\/p>\n

copyOfRange -\u6570\u636e\u8d1f\u8d23<\/h3>\n

\u4e0e\u4f7f\u7528System.arraycopy\u8fdb\u884c\u6570\u7ec4\u590d\u5236\u7c7b\u4f3c\u7684\uff0c Arrays\u63d0\u4f9b\u4e86\u4e00\u4e2acopyOfRange\u65b9\u6cd5\u8fdb\u884c\u6570\u7ec4\u590d\u5236\u3002 \u4e0d\u540c\u7684\u662fSystem.arraycopy\uff0c\u9700\u8981\u4e8b\u5148\u51c6\u5907\u597d\u76ee\u6807\u6570\u7ec4\uff0c\u5e76\u5206\u914d\u957f\u5ea6\u3002 copyOfRange \u53ea\u9700\u8981\u6e90\u6570\u7ec4\u5c31\u5c31\u53ef\u4ee5\u4e86\uff0c\u901a\u8fc7\u8fd4\u56de\u503c\uff0c\u5c31\u80fd\u591f\u5f97\u5230\u76ee\u6807\u6570\u7ec4\u4e86\u3002<\/p>\n

\u9664\u6b64\u4e4b\u5916\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f copyOfRange \u7684\u7b2c3\u4e2a\u53c2\u6570\uff0c\u8868\u793a\u6e90\u6570\u7ec4\u7684\u7ed3\u675f\u4f4d\u7f6e\uff0c\u662f\u53d6\u4e0d\u5230\u7684\u3002<\/p>\n

import java.util.Arrays;\r\n \r\npublic class HelloWorld {\r\n    public static void main(String[] args) {\r\n        int a[] = new int[] { 18, 62, 68, 82, 65, 9 };\r\n \r\n        \/\/ copyOfRange(int[] original, int from, int to)\r\n        \/\/ \u7b2c\u4e00\u4e2a\u53c2\u6570\u8868\u793a\u6e90\u6570\u7ec4\r\n        \/\/ \u7b2c\u4e8c\u4e2a\u53c2\u6570\u8868\u793a\u5f00\u59cb\u4f4d\u7f6e(\u53d6\u5f97\u5230)\r\n        \/\/ \u7b2c\u4e09\u4e2a\u53c2\u6570\u8868\u793a\u7ed3\u675f\u4f4d\u7f6e(\u53d6\u4e0d\u5230)\r\n        int[] b = Arrays.copyOfRange(a, 0, 3);\r\n \r\n        for (int i = 0; i < b.length; i++) {\r\n            System.out.print(b[i] + \" \");\r\n        }\r\n \r\n    }\r\n}<\/pre>\n
toString-\u8d1f\u8d23\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32<\/h3>\n
\u5982\u679c\u8981\u6253\u5370\u4e00\u4e2a\u6570\u7ec4\u7684\u5185\u5bb9\uff0c\u5c31\u9700\u8981\u901a\u8fc7for\u5faa\u73af\u6765\u6328\u4e2a\u904d\u5386\uff0c\u9010\u4e00\u6253\u5370\u3002<\/p>\n
\u4f46\u662fArrays\u63d0\u4f9b\u4e86\u4e00\u4e2atoString()\u65b9\u6cd5\uff0c\u76f4\u63a5\u628a\u4e00\u4e2a\u6570\u7ec4\uff0c\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0c\u8fd9\u6837\u65b9\u4fbf\u89c2\u5bdf\u6570\u7ec4\u7684\u5185\u5bb9\u3002<\/p>\n
import java.util.Arrays;\r\n  \r\npublic class HelloWorld {\r\n    public static void main(String[] args) {\r\n        int a[] = new int[] { 18, 62, 68, 82, 65, 9 };\r\n        String content = Arrays.toString(a);\r\n        System.out.println(content);\r\n  \r\n    }\r\n}<\/pre>\n
sort()-\u6392\u5e8f<\/h3>\n
Arrays\u5de5\u5177\u7c7b\u63d0\u4f9b\u4e86\u4e00\u4e2asort\u65b9\u6cd5\uff0c\u53ea\u9700\u8981\u4e00\u884c\u4ee3\u7801\u5373\u53ef\u5b8c\u6210\u6392\u5e8f\u529f\u80fd\u3002<\/p>\n
import java.util.Arrays;\r\n  \r\npublic class HelloWorld {\r\n    public static void main(String[] args) {\r\n        int a[] = new int[] { 18, 62, 68, 82, 65, 9 };\r\n        System.out.println(\"\u6392\u5e8f\u4e4b\u524d :\");\r\n        System.out.println(Arrays.toString(a));\r\n        Arrays.sort(a);\r\n        System.out.println(\"\u6392\u5e8f\u4e4b\u540e:\");\r\n        System.out.println(Arrays.toString(a));\r\n  \r\n    }\r\n}<\/pre>\n
Arrays.binarySearch\uff08\uff09-\u67e5\u8be2\u529f\u80fd<\/h3>\n
\u67e5\u8be2\u5143\u7d20\u51fa\u73b0\u7684\u4f4d\u7f6e<\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f7f\u7528binarySearch\u8fdb\u884c\u67e5\u627e\u4e4b\u524d\uff0c\u5fc5\u987b\u4f7f\u7528sort\u8fdb\u884c\u6392\u5e8f<\/p>\n
\u5982\u679c\u6570\u7ec4\u4e2d\u6709\u591a\u4e2a\u76f8\u540c\u7684\u5143\u7d20\uff0c\u67e5\u627e\u7ed3\u679c\u662f\u4e0d\u786e\u5b9a\u7684<\/p>\n
import java.util.Arrays;\r\n \r\npublic class HelloWorld {\r\n    public static void main(String[] args) {\r\n        int a[] = new int[] { 18, 62, 68, 82, 65, 9 };\r\n \r\n        Arrays.sort(a);\r\n \r\n        System.out.println(Arrays.toString(a));\r\n        \/\/\u4f7f\u7528binarySearch\u4e4b\u524d\uff0c\u5fc5\u987b\u5148\u4f7f\u7528sort\u8fdb\u884c\u6392\u5e8f\r\n        System.out.println(\"\u6570\u5b57 62\u51fa\u73b0\u7684\u4f4d\u7f6e:\"+Arrays.binarySearch(a, 62));\r\n    }\r\n}<\/pre>\n
Arrays.equals()-\u5224\u65ad\u662f\u5426\u76f8\u540c<\/h3>\n
Arrays.equals \u8fd4\u56de\u7c7b\u4f3c\u4e5f\u662f\u5e03\u5c14\u7c7b\u578b\uff08true\/false\uff09<\/p>\n
import java.util.Arrays;\r\n \r\npublic class HelloWorld {\r\n    public static void main(String[] args) {\r\n        int a[] = new int[] { 18, 62, 68, 82, 65, 9 };\r\n        int b[] = new int[] { 18, 62, 68, 82, 65, 8 };\r\n \r\n        System.out.println(Arrays.equals(a, b));\r\n    }\r\n}<\/pre>\n
Arrays.fill() – \u586b\u5145<\/h3>\n
fill()\u662f\u4f7f\u7528\u540c\u4e00\u4e2a\u503c\u53bb\u586b\u5145\u5269\u4e0b\u7a7a\u7f6e\u7684\u4f4d\u7f6e<\/p>\n
import java.util.Arrays;\r\n  \r\npublic class HelloWorld {\r\n    public static void main(String[] args) {\r\n        int a[] = new int[10];\r\n  \r\n        Arrays.fill(a, 5);\r\n  \r\n        System.out.println(Arrays.toString(a));\r\n  \r\n    }\r\n}<\/pre>\n
\n
\u597d\u4e86\u5199\u5b8c\u4e86\u3002\u665a\u5b89\u5404\u4f4d<\/p>\n
\"\"<\/div><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\u597d\u50cf\u505a\u4e86\u4e00\u4f4d\u9ad8\u4ea7\u7684\u5c0f\u535a\u4e3b~ java.util.Arrays\u662f\u9488\u5bf9\u6570\u7ec4\u7684\u5de5\u5177\u7c7b\uff0c\u53ef\u4ee5\u8fdb\u884c \u6392\u5e8f\uff0c\u67e5\u627e\uff0c\u590d\u5236 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[142,129,143],"class_list":["post-544","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-arryas","tag-java","tag-143"],"_links":{"self":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/544","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/comments?post=544"}],"version-history":[{"count":1,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/544\/revisions"}],"predecessor-version":[{"id":546,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/544\/revisions\/546"}],"wp:attachment":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/media?parent=544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/categories?post=544"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/tags?post=544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}