java中Vector有什么用，举例说明

3.1 Vector的用法 

马克-to-win：Vector和ArrayList很类似，前面讲了二者的区别，就在于同步的问题上，Vector的使用是非常简单的：先创建一个，再用addElement()置入对象，以后用elementAt()取得那些对象

例：3.1.1

import java.io.*;

import java.util.*;

public class TestMark_to_win {

    public static void main(String args[]) {

        Vector v = new Vector();

        for (int i = 0; i < 4; i++) {

            v.addElement(new Integer(i));

        }

        Iterator it = v.iterator();

        while (it.hasNext()) {

            System.out.println("" + it.next());

        }

        if (v.contains(new Integer(2))) {

            System.out.println("it has 2");

        }

        Enumeration e = v.elements();

        while (e.hasMoreElements()) {

            System.out.println(e.nextElement());

        }

        v.removeElementAt(2);

        v.addElement("kkk");

        v.addElement(new Double(1.1));

        /*the following statement is a must, because e has ever gone to the end

of the queue.*/

        e = v.elements();

        while (e.hasMoreElements()) {

            System.out.println(e.nextElement());

        }

    }

}

更多请见：https://blog.csdn.net/qq_44639795/article/details/102696481