java小白——重写方法克隆对象

代码如下：

package qaq;

public class qaq30 {

	 public static void main(String[]args){
		 Clockrrr cobj = new Clockrrr();
		 cobj.setClock(22, 11, 10);
		 System.out.println(cobj);  //显示引用变量
		 System.out.println(cobj.toString());//转成字符串
		 System.out.println(cobj.getClass().getName());//取得对象cobj的类名
		 Clockrrr cobj2 = cobj;
		 System.out.println(cobj == cobj2);//检测引用是否相同
		 System.out.println(cobj2.equals(cobj));//检测两个对象内容是否相同
		 System.out.println(cobj.hashCode());//显示对象cobj的哈希码
		 System.out.println(cobj2.hashCode());//显示对象cobj2的哈希码
		try {
			Clockrrr cobj3 = (Clockrrr)cobj.clone();//克隆一个和cobj一样的对象
			System.out.println(cobj.toString());//检查克隆对象的内容是否相同
		}catch(CloneNotSupportedException e){};
		}
	 }


	
 class Clockrrr implements Cloneable{ //自动继承Object类，实现接口Cloneable
	   private int hour;
		private int minute;
		private int second;
		public void setClock(int x,int y,int z){
			hour = x; minute = y; second = z;
		}
		public void showClock(){
			System.out.print(hour+":"+minute+":"+second);
		}
		
	
	public String toString(){ //重写tostring方法
		return String.format("Clock@%d:%d:%d",hour,minute,second);
		}
	public int hashCode(){//重写方法并生成哈希码
		return hour*10000+minute*100+second;
	}
	public boolean equals(Object obj){//重写方法equals()
		if((obj instanceof Clockrrr)==false)//类型不同直接返回false
			return false;
		Clockrrr c = (Clockrrr)obj;//将object型转换成clockrrr型
		return c.hour == hour;//比较时
		
	}
	public Object clone() throws CloneNotSupportedException //重写方法clone()
	{
		Clockrrr c = (Clockrrr)super.clone(); return c;// 克隆一个钟表对象
	}
 }