6.14vectortest.java

JAVA程序设计的源代码

import java.util.*;
class VectorTest
{
public static void main(String []args)
{
Vector vec =new Vector(3);
System.out.println("old capality is "+vec.capacity());
vec.addElement(new Integer(1));    //动态往向量中加入不同类型的元素
vec.addElement(new Integer(2));
vec.addElement(new Integer(3));
vec.addElement(new Float(2.78));
vec.addElement(new Double(2.78));
System.out.println("new capacity is "+vec.capacity());    
System.out.println("new size is "+vec.size());    //获取元素个数
System.out.println("first item is "+(Integer)vec.firstElement());    //获取向量中首元素
if(vec.contains(2))    //查找向量中的元素是否存在
System.out.println("found 2");
vec.removeElementAt(1);    //移除向量中元素
if(vec.contains(2))
System.out.println("found2");
else
System.out.println("after deleting not found 2");
}
}