class point
{
	int x,y;
	point(int a,int b)
	{
    this.x=a;
    this.y=b;
	System.out.println("父類先構建 ！");
	}
	
	public void finalize()
    {
	  System.out.println("父類回收！");
    }
    
    String getstring()
    {
    	return "x="+x+";  y="+y;
    }

}

class circle extends  point
{
	int radius;
	circle(int a,int b,int r)
	{
    super(a,b);
    radius=r;
	System.out.println("類 "+getClass().getName()+" 構建：" +getstring() );
	}
	
	public void finalize()
    {
	  this.x=0;
	  this.y=0;
	  this.radius=0;
	  System.out.println("類 "+getClass().getName()+" 回收："+getstring() );
    }
    
    String getstring()
    {
    	return super.getstring()+";   radius="+radius;
    }

}

public class finalize
{
		public static void main(String args[])
	{
		point c1,c2;
		c1=new circle(11,22,33);
		c2=new circle(77,88,99);
		c1=null;
		c2=null;
		System.gc();
	}


}