LinkedSet的应用

代码如下

import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String input=sc.nextLine();
        String getInput=sc.nextLine();
//        for (int i = 0; i <realInput.length() ; i++) {
//            if(Character.isLowerCase(realInput.charAt(i))){
//                 char ch=Character.toUpperCase (realInput.charAt(i));
//                realInput=realInput.replace(realInput.charAt(i),ch);
//            }
//        }
        Set<Character> inputSet = new LinkedHashSet<>();
        Set<Character> getInputSet = new LinkedHashSet<>();
        Set<Character> resSet = new LinkedHashSet<>();

        for(int i=0;i<input.length();i++){
            inputSet.add(input.charAt(i));
        }
        for (int i = 0; i <getInput.length() ; i++) {
            getInputSet.add(getInput.charAt(i));
        }

        Iterator<Character> it0 = inputSet.iterator();
        Iterator<Character> it1 = getInputSet.iterator();

        while(it0.hasNext()){
            boolean flag=false;
            String e0=it0.next()+"";
            it1=getInputSet.iterator();
            while(it1.hasNext()){
                String e1=it1.next()+"";
                if(e1.equalsIgnoreCase(e0)){
                    flag=true;
                }
            }
            if(flag==false){
               resSet.add(Character.toUpperCase(e0.toCharArray()[0]));
            }
        }
        //System.out.println(input);
        Iterator<Character> iterator = resSet.iterator();
        while(iterator.hasNext()){
            System.out.print(iterator.next());
        }
        System.out.println();

    }
}

1029 旧键盘 (20分)

原文：https://www.cnblogs.com/cstdio1/p/12130253.html