public class Solution { public boolean isSubsequence(String s, String t) { int idx = 0; for (int i=0; i<t.length()&&idx<s.length(); i++) { if (s.charAt(idx) == t.charAt(i)) { idx++; } } return idx == s.length(); } }
原文：http://www.cnblogs.com/charlesblc/p/5877495.html