demo.java

java 北大青鸟 java 北大青鸟

import java.util.*;
import java.util.LinkedList;
public class Demo{
	public static void main(String args[]){
		Vector v= new Vector();
		v.addElement("a");
		v.addElement("b");
		v.addElement(new Integer(12));

		for(int i=0;i<v.size();i++){
			System.out.println(v.elementAt(i));
		ArrayList a = new ArrayList();
		//a.n
	LinkedList d= new LinkedList();	
	d.add("d1");
	d.add("a1");
	for(int j=0;j<d.size();j++){	System.out.println(d.get(j));}
	
	}
	
		}
	}