IP地址排序

来源：互联网发布：java怎么做界面编辑：程序博客网时间：2024/06/05 18:58

import java.util.Arrays;public class IP_Sort {public static void main(String[] args){String[] ip_array = {"192.68.0.254","172.22.144.156","172.22.145.0","255.255.255.2","8.109.90.30"};for(int i =0;i<ip_array.length;i++){// add 00 before every integer   String regex = "(\\d+)";ip_array[i] = ip_array[i].replaceAll(regex, "00$1");// only three digits leftregex = "0*(\\d{3})";ip_array[i] = ip_array[i].replaceAll(regex, "$1");}        Arrays.sort(ip_array);  //key sort [***sort by natural sequence****]                for(int i = 0;i<ip_array.length;i++){        System.out.println(ip_array[i]);        }        System.out.println("-----------------------");        for(int i = 0;i<ip_array.length;i++){        //remove extra 0 before every digit        ip_array[i] = ip_array[i].replaceAll("0*(\\d+)", "$1");        System.out.println(ip_array[i]);        }}}

运行结果：

008.109.090.030172.022.144.156172.022.145.000192.068.000.254255.255.255.002-----------------------8.109.90.30172.22.144.156172.22.145.0192.68.0.254255.255.255.2

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