test169.java

SCJP认证考试资料

import java.util.*;
public class Test169 implements Comparable {
    public String name;
    public int compareTo(Object o) {
	return 0;
    }
    public static void main(String[] args) {
	Test169 one = new Test169();
	Test169 two = new Test169();
	one.name = "Cofee";
	two.name = "tea";
	TreeSet set = new TreeSet();
	System.out.println(set.add(one));
	System.out.println(set.add(two));
	for (Test169 o:set) {
	    System.out.println(o.name);
	}

    }
}