Java SE之字符的统计

Java SE之字符的统计

Java SE 字符的统计

输入一篇英文文章，统计每个字符出现的次数。

import java.util.Scanner;public class Statistics {String txt ;int[] index;public Statistics() {this.txt = "";index = new int[128];  // 整形数组默认值0}public void receive(){Scanner input = new Scanner(System.in);txt = input.next();char[] num = txt.toCharArray();for (int i = 0; i < num.length; i++) {index[num[i]]++;}for (int i = 0; i < index.length; i++) {if(index[i] != 0){System.out.println((char)i + ":"+ index[i]);}}}public static void main(String[] args) {Statistics statistics = new Statistics();statistics.receive();}
}