# LeetCode – Is Subsequence (Java)

Given a string s and a string t, check if s is subsequence of t.

You may assume that there is only lower case English letters in both s and t. t is potentially a very long (length ~= 500,000) string, and s is a short string (<=100).

A subsequence of a string is a new string which is formed from the original string by deleting some (can be none) of the characters without disturbing the relative positions of the remaining characters. (ie, "ace" is a subsequence of "abcde" while "aec" is not).

Java Solution

```public boolean isSubsequence(String s, String t) { if(s.length()==0) return true;   int i=0; int j=0; while(i<s.length() && j<t.length()){ if(s.charAt(i)==t.charAt(j)){ i++; }   j++;   if(i==s.length()) return true; }   return false; }```
Category >> Algorithms
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• Bo Wu

My answer is quite similar to this one. Can someone spot the reason why my code fails?

public boolean isSubsequence(String s, String t) {
if (s.length() > t.length())
return false;

int i = 0 ;
int j = 0 ;

if ( j == s.length())
return true;

while (i < t.length())
if ( t.charAt( i ++ ) == s.charAt(j ))
if ( j++ == s.length())
return true;

return false;
}