TreeSet 里可以插入重复元素嘛

public static void main(String[] args){

		Set aset = new TreeSet();

		VO avo1 = new VO(1);

		VO avo2 = new VO(3);

		

		if(avo1.equals(avo2)){

			System.out.println("equals:" + true);

		}

		

		if(avo1.hashCode() == avo2.hashCode()){

			System.out.println("hashcode:" + true);

		}



		aset.add(avo1);

		aset.add(avo2);

		

		Iterator it = aset.iterator();

		while(it.hasNext()){

			VO show = (VO)it.next();

			System.out.println(show.toString());

		}

	}

public class VO implements Comparable{

	private int name;

	

	

	public VO(int name){

		this.name = name;

	}



	@Override

	public boolean equals(Object obj) {

		VO vo = (VO)obj;//比较余数

		if(this.hashCode() - vo.hashCode()==0){

			return true;

		}

		return false;

	}



	@Override

	public int hashCode() {

		// TODO Auto-generated method stub

		return name%2;//取余数

	}



	@Override

	public int compareTo(Object obj) {

		

		return this.name - ((VO)obj).name;

	}



	@Override

	public String toString() {

		// TODO Auto-generated method stub

		return "name:" + name;

	}

	

	

}