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Isomorphic Strings (Leetcode 205) #307

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Isomorphic Strings (Leetcode 205) #307

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20 changes: 20 additions & 0 deletions Easy/Isomorphic Strings.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
class Solution {
public boolean isIsomorphic(String s, String t) {
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)){
map1.put(ch1,ch2);
}
if(!map2.containsKey(ch2)){
map2.put(ch2,ch1);
}
if(map1.get(ch1)!=ch2 || map2.get(ch2)!=ch1){
return false;
}
}
return true;
}
}