Java对象克隆了解

package com.clone;
class Cat implements Cloneable{
	private int age;
	private String name;
	public void setAge(int age) {
		this.age = age;
	}
	public int getAge() {
		return age;
	}
	public Cat(int age,String name)
	{
		
		this.age=age;
		this.name=name;
	}
	public String toString()
	{
		return "姓名："+this.name+",年龄："+this.age;
	}
	
	@Override
	protected Object clone() throws CloneNotSupportedException {
		// TODO Auto-generated method stub
		return super.clone();
	}
	
}
public class TestClone {

	public static void main(String[] args) {
		Cat cat1=new Cat(20,"小白");
		Cat cat2=null;
		try {
			cat2=(Cat)cat1.clone();
		} catch (CloneNotSupportedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println(cat1);
		System.out.println(cat2);
		
		cat1.setAge(30);
		
		System.out.println(cat1);
		System.out.println(cat2);
		
		System.out.println(cat1==cat2);
	
	}

}