392. Is Subsequence(貪心)

package Greedy;

public class isSubsequence_392 {

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

	}

}