练习

package com.hanqi;

public class 作业 {

    public static void main(String[] args) {
        //输出i的次数
        String a="mingrikejijavabu";
        int b=a.length();
        System.out.println("原来字符长度="+b);
        int c=(a.replace("i","")).length();
        System.out.println("现在字符长度="+c);
        int d=b-c;
        System.out.println("i一共出现"+d+"次");