关于克隆的一些疑问，求大大指教！
package c12;import java.util.*; class Int { private int i; public Int(int ii) { i = ii; } public void increment() { i++; } public String toString() { return Integer.toString(i); } } public class Cloning { public static void main(String[] args) { Vector v = new Vector(); for(int i = 0; i < 10; i++ ) v.addElement(new Int(i)); System.out.println("v: " + v); Vector v2 = (Vector)v.clone(); //Increment all v2's elements: for(Enumeration e = v2.elements(); e.hasMoreElements(); ) ((Int)e.nextElement()).increment(); //See if it changed v's elements: System.out.println("v2:"+v2); System.out.println("v:"+v); if (v2!=v) System.out.println("This is different"); // System.out.println("v: " + v); } }