🚀 go-pugleaf

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: ���ࣺ
: public class Point
: {
:     protected double x,y;
:     public Point(double x,double y)
:     { setPoint(x,y);}
:     public void setPoint(double x,double y)
:     {this.x=x;this.y=y;}
:     public String toString()
:     {return "("+x+","+y+")";}
: }
: ���ࣺ
: public class MyPoint extends Point
: {
:     private static Point p;
:     public MyPoint()
:     {super(0,0);}
:     public static void main(String args[])
:     {
:         p=new Point(0,0);
: (��������ʡ��...)

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