TreeMap简单示例

package cn.itcast.demo;

import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Set;

import org.junit.Test;


 
 

public class TreeMapTest {
	
	@Test
	public void LinkedHashMapTest()
	{	
		LinkedHashMap lhmap  = new LinkedHashMap();
		lhmap.put("00", "abd");
		lhmap.put("1", "abd1");
		lhmap.put("2", "abd2");
		lhmap.put("3", "abd3");
		lhmap.put("4", "abd4");
		System.out.println(lhmap);
		
		Set set = lhmap.keySet();  //获取全部键值，它的返回值类型是set
		Iterator it = set.iterator();
		while(it.hasNext())
		{
			//System.out.println(it.next()+";");  
			Object obj = it.next();
			System.out.println(obj+"="+lhmap.get(obj)+";");
		}
		
	}
	

	
	
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}