Collection之Set接口

package com.study;

import java.util.Set;
import java.util.HashSet;
import java.util.TreeSet;


public class TestSetCollection {
	
	public void doSet() {
		//Set接口 没有循序，且不可以重复.
		Set set1= new HashSet();
		
		set1.add(new String("zhudansheng set1"));
		set1.add(new String("zhudansheng set2"));
		set1.add(new String("zhudansheng set3"));
		set1.add(new String("zhudansheng set3"));
		set1.add(new String("zhudansheng set3"));
		set1.add(new Boolean(true));
		set1.add(new Boolean(false));
		
		Set set2 = new TreeSet();	
		set2.add("tet Set1");
		set2.add("tet Set1");
		set2.add("tet Set1");
		set2.add("tet Set1");
		
		set2.add("tet Set2");		
		set2.add(new String("22222"));
		
		System.out.println(set1);
		System.out.println(set2);
	}
	
	public static void main(String []args) {
		TestSetCollection testSet = new TestSetCollection();
		testSet.doSet();
	}
}