删除公共字符

题目描述

输入两个字符串，从第一字符串中删除第二个字符串中所有的字符。例如，输入”Theyare students.”和”aeiou”，则删除之后的第一个字符串变成”Thy r stdnts.”

输入描述:

每个测试输入包含2个字符串

输出描述:

输出删除后的字符串

示例1

输入

They are students.

aeiou

输出

Thy r stdnts.

实现

import java.util.HashSet;

import java.util.Scanner;

public class Main {

       publicstatic void main(String[] args) {

              Scannerin = new Scanner(System.in);

              while(in.hasNext()) {

                     Stringstr1 = in.nextLine();

                     Stringstr2 = in.nextLine();

                     HashSet<Character>set = new HashSet<Character>();

                     for(int i = 0; i < str2.length(); i++) {

                            set.add(str2.charAt(i));

                     }

                     StringBuildersb = new StringBuilder();

                     for(int i = 0; i < str1.length(); i++) {

                            if(!set.contains(str1.charAt(i))) {

                                   sb.append(str1.charAt(i));

                            }

                     }

                     System.out.println(sb.toString());

              }

       }

}