字符统计

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4     public static void main(String[] args) {
 5         Scanner sc = new Scanner(System.in);
 6         while(sc.hasNext()) {
 7             
 8             int[] ascii = new int[128];//ASCII码0~127
 9             
10             String s = sc.nextLine();
11             for(int i=0; i<s.length();i++) {
12                 char c = s.charAt(i);
13                 int n = (int)c;
14                 ascii[n]++;
15             }
16             
17             int max =0;//先找ASCII码出现最多的次数值
18             for(int i=0; i<128; i++) {
19                 if(ascii[i] > max) {
20                     max = ascii[i];
21                 }
22             }
23             while(max!=0) {
24                 for(int i=0; i<128; i++) {
25                     if(ascii[i] == max) {//再反过来用最大值找对应的ASCII码 
26                         System.out.print((char)i);
27                     }
28                 } 
29                 max--;
30             }
31             System.out.println();
32         }
33     }
34 }