基础练习 字符串对比

import java.util.Scanner;
public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc=new Scanner(System.in);
        String s1=sc.nextLine();
        String s2=sc.nextLine();
        int result;
        if(s1.length()!=s2.length()){
            result=1;}

        else {
            if(s1.equals(s2)){
                result=2;
            }
            else if(s1.toLowerCase().equals(s2.toLowerCase())){
                result=3;
            }
            else
                result=4;
        }
        System.out.println(result);

    }

}