package stackoverflow;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * @author TheLima
 */
public class Q_13348701 {

	/**
	 * @param args the command line arguments
	 */
	public static void main(String[] args) {
		String[] tests = {
			"11,22,33", //valid.
			"11,22,11", //not valid.
			"Nice,Code,Brian", //Flexible version of @Brian's - valid.
			"No,Means,No" //Flexible version of @Brian's - not valid.
		};

		System.out.println("My own initial method:");
		for (String s : tests) {
			System.out.println(isValid(s));
		}
		System.out.println();
		System.out.println("Modified Brian's \"Set method\":");
		for (String s : tests) {
			System.out.println(isValid_SetMethod(s));
		}
	}

	public static boolean isValid(String source) {
		List<String> list = new ArrayList<String>();
		for (String sub : source.split(",")) {
			if (list.contains(sub)) {
				return false;
			} else {
				list.add(sub);
			}
		}
		return true;
	}

	public static boolean isValid_SetMethod(String source) {
		Set<String> set = new HashSet<String>();
		for (String sub : source.split(",")) {
			if (!set.add(sub)) {
				return false;
			}
		}
		return true;
	}
}