JAVA：在第一个字符串中删除第二个字符串

package day40.在第一个字符串中删除第二个字符串;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str1 = scanner.nextLine();
        String str2 = scanner.nextLine();
      for (int i = 0;i< str2.length();i++){
          int index =0;
          while ((index =str1.indexOf(str2.charAt(i)))!=-1){
              str1=str1.substring(0,index)+str1.substring(index+1);

          }
      }
        System.out.println(str1);
    }
}