Java统计字符串中字符出现次数的方法示例

package com.wenzhi;import java.util.Scanner;public class Test01 {  public static void main(String args[]) {    Scanner scan = new Scanner(System.in);    System.out.println("请你输入字符");    String str = scan.nextLine();    Scanner scan1 = new Scanner(System.in);    System.out.println("请输入你要查找的子字符串");    String str1 = scan1.nextLine();    int count = 0;    int start = 0;    while (str.indexOf(str1, start) >= 0 && start < str.length()) {      count++;      start = str.indexOf(str1, start) + str1.length();    }    System.out.println(str1 + "在" + str + "出现的次数为" + count);  }}