leetcode205.java

import java.util.*;
public class leetcode205 {
    public static boolean isIsomorphic(String s, String t) {
        if(s.length()!=t.length()){
            return false;
        }
        HashMap<Character,Character> map1=new HashMap<>();
        HashMap<Character,Character> map2=new HashMap<>();
        for(int i=0;i<s.length();i++){
            char ch1=s.charAt(i);
            char ch2=t.charAt(i);
            if(map1.containsKey(ch1)){
                if(map1.get(ch1)!=ch2){
                    return false;
                }
            }
            else{
                map1.put(ch1,ch2);
            }

            if(map2.containsKey(ch2)){
                if(map2.get(ch2)!=ch1){
                    return false;
                }
            }
            else{
                map2.put(ch2,ch1);
            }
        }
        return true;
    }
    public static void main(String[] args) {
        System.out.println(isIsomorphic("bat","hrr"));
    }
}