简单的字符串去重方法

public static void main(String[] args) {
		String sNew = "";
		String sOld = "pwwekwas";
		for(int i = 0; i < sOld.length(); i++) {
			if(sNew.indexOf(sOld.charAt(i)) < 0) {
				sNew = sNew + sOld.charAt(i);
			}
		}
		System.out.println(sNew);
	}