判断子序列

采用双指针

class Solution {public boolean isSubsequence(String s, String t) {int slen=s.length();int tlen=t.length();int j=0;if(slen==0){return true;}if(tlen==0){return false;}for(int i=0;i<tlen;i++){if(t.charAt(i)==s.charAt(j)){j++;}if(j==slen){return true;}}return false;}
}