testvector2.java

来自「java课件及例程有一些PPT及一些例程」· Java 代码 · 共 30 行

import java.util.Vector;
public class TestVector2{
    void printMessage(String s,Vector v){
        System.out.println(s);
        if(v.size()==0)
            System.out.print("there is no data");
        else{
            for(int i=0;i<v.size();i++)
                System.out.print(v.get(i)+"  ");
        }
        System.out.println();
    }
    public static void main(String args[]){
    	TestVector2 m = new TestVector2();
        Vector v1 = new Vector();
        for(int i=0;i<4;i++)
            v1.add(new Integer(i+2));
        String s1="the element in v1:";
        m.printMessage(s1,v1);
        
        v1.setElementAt(new Integer(30),3);
        v1.set(2,new Integer(22));
        m.printMessage("after the modify,the element in v1:",v1);
        
        Integer x = (Integer)v1.remove(2);
        System.out.println("the element to delete is:"+x.toString());
        v1.removeAllElements();
        m.printMessage("after the delete,the element in v1:",v1);
    }
}