1 package com.wh.ObjectHomeWork; 2  3 import java.util.Arrays; 4  5 public class CharArray { 6     private char[] words; 7  8     public CharArray(char[] words) { // 构造方法 9         this.words = words;10     }11 12     public void sort() { // 对数组进行冒泡排序13         for (int i = 0; i < words.length - 1; i++) {14             for (int j = 0; j < words.length - 1 - i; j++) {15                 if (words[j] > words[j + 1]) {16                     char t = words[j];17                     words[j] = words[j + 1];18                     words[j + 1] = t;19                 }20             }21         }22     }23 24     public int search(char key){25         int start=0,ends=words.length-1;26         int middle;27         int index=0;28         for(;;){29             middle=(ends+start)/2+(ends+start)%2;30             if(words[middle]==key){31                 index=middle;32                 break;33             }else if(key<words[middle]&&key>=words[start]){34                 ends=middle;35             }else if(key>words[middle]&&key<=words[ends]){36                 start=middle;37             }else{38                 index=-1;39                 break;40             }41             System.out.print(index+",");42         }        43         return index;44     }45 46     public static void main(String[] args) {47         char[] arr = "qwertyuiopasdfghjklzxcvbnm".toCharArray();48         CharArray c1 = new CharArray(arr);49         System.out.println("排序前：" + Arrays.toString(arr));50         c1.sort();51         System.out.println("排序后：" + Arrays.toString(arr));52         char num=150;53         int index=c1.search(num);54         System.out.println(index);55     }56 }

1 排序前：[q, w, e, r, t, y, u, i, o, p, a, s, d, f, g, h, j, k, l, z, x, c, v, b, n, m]2 排序后：[a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z]3 -1