Java Day 16

 1 package com.company;
 2 
 3 import java.util.Arrays;
 4 import java.util.Objects;
 5 
 6 /**
 7  * Created by junius on 2016/10/2.
 8  * 1、将字符串变成字符串数组
 9  * 2、将字符数组变成int数组
10  * 3、对int数组进行排序
11  * 4、将排序后的数组变成字符串数组
12  */
13 public class Test001 {
14     private static final String space_string=" ";
15     public static void main(String[] args) {
16 
17         String numStr = "20 23 4 5 6 -8  0 88";
18         System.out.println(numStr);
19         numStr = sortStringNumber(numStr);
20         System.out.println(numStr);
21     }
22 
23     public static String sortStringNumber(String numStr) {
24         String[] str_arr = stringToArray(numStr);
25         int[] num_arr = stringToInt(str_arr);
26         mySort(num_arr);
27         String temp = arrayToString(num_arr);
28         return temp;
29     }
30 
31     public static String arrayToString(int[] num_arr) {
32         StringBuilder sb = new StringBuilder();
33         for (int i = 0; i <num_arr.length ; i++) {
34             if(i!=num_arr.length-1){
35                 sb.append(num_arr[i]+space_string);
36             }else {
37                 sb.append(num_arr[i]);
38             }
39         }
40         return sb.toString();
41     }
42 
43     public static void mySort(int[] num_arr) {
44         Arrays.sort(num_arr);
45     }
46 
47     public static int[] stringToInt(String[] str_arr) {
48         int[] num_arr =  new int[str_arr.length];
49         for (int i = 0; i <str_arr.length; i++) {
50             num_arr[i] =Integer.parseInt(str_arr[i]);
51         }
52         return num_arr;
53     }
54 
55     private static String[] stringToArray(String numStr) {
56         return numStr.split(space_string+"+");
57     }
58 
59 
60 }