inheritance with superkey

class simplegeo
{
    private String colour="white";
  //  private java.util.Date dlcrated;
    private boolean filled;


    public simplegeo(boolean f){

        this.filled=true;

    }


   /* public simplegeo(String k)
    {
        this.colour=k;
    }*/

    public boolean getbol()
    {
        return filled;
    }

    public void setbol(boolean s)
    {
        this.filled=s;
    }

    public String getString()
    {
        return colour;
    }
    public void setstring(String s)
    {
        this.colour=s;
    }


   /* public void setdate(java.util.Date d)
    {
        this.dlcrated=d;
    }
   public java.util.Date getdate()
    {
        return dlcrated;
    }*/

}

class circle extends simplegeo
{

    private double radius;

    public circle(boolean f,int r){
        super(f);
        this.radius=r;

    }

    public double getrad()
    {
        return radius;
    }

    public void setrad(double a)
    {
        this.radius=a;
    }

    public double rarea()
    {
        return (radius*radius)*3.14;
    }

    public double rperi()
    {
        return 2*radius;
    }
}

class rectangle extends simplegeo
{
    private int length;
    private int width;

    public rectangle(boolean f,int l,int w)
    {
        super(f);
        this.length=l;
        this.width=w;

    }

    public int getlength()
    {
        return length;
    }

    public void setlength(int x)
    {
        this.length=x;
    }

    public int getwidth()
    {
        return width;
    }

    public void setwidth(int y)
    {
        this.width=y;
    }

    public int getarea()
    {
        return (length*width);
    }

    public int getperirec()
    {
        return 2*(length+width);
    }

}

class square extends simplegeo
{
    private int edge;

    public square(boolean f,int ed)
    {
        super(f);
        this.edge=ed;
    }

    public int getedge()
    {
        return edge;
    }
    public void setedeg(int t)
    {
        this.edge=t;
    }
    public int getsarea()
    {
        return edge*edge;
    }
    public int getsperi()
    {
        return 4*edge;
    }
}


 class inheritance
 {

     public static void main(String[] args)
     {
         //the main object is call name is simplegeo

         System.out.println("the main class simplegeo \n");

         simplegeo obj1=new simplegeo(false);
         //obj1.setstring("white");
         System.out.println("the now colour is "+obj1.getString());
         //obj1.setdate(31/3/15);
         //System.out.println("the new date is right now "+obj1.getdate());

        // obj1.setbol(true);
         System.out.println("now,check the value of the it's filled or not and at least last we get our result "+obj1.getbol());

         System.out.println("\n");

        // --------------------------------

         //the next object is call name is circle
         System.out.println("the second class circle \n");

         circle obj2=new circle(true,12);
         //obj2.setrad(5.3);
         System.out.println("the radius value is currently is "+obj2.getrad());
         System.out.println("the area of the circle is "+obj2.rarea());
         System.out.println("the prime is that is "+obj2.rperi());


         //obj2.setbol(true);
         System.out.println("your object is filled or not "+obj2.getbol());
         obj2.setstring("blue");
         System.out.println("now, your object is filled with the colour "+obj2.getString());



         System.out.println("\n");

         //-----------------------------------
         System.out.println("the third class rectangle \n");

         rectangle obj3 = new rectangle(false,12,14);
        // obj3.setlength(12);
         //obj3.setwidth(14);

         System.out.println("the value of the length is "+obj3.getlength());
         System.out.println("the value of the width is "+obj3.getwidth());
         System.out.println("the area of this rectangle is "+obj3.getarea());
         System.out.println("the peri of this rectangle is "+obj3.getperirec());

         obj3.setbol(false);
         System.out.println("your object is filled or not "+obj3.getbol());
         //obj2.setstring("blue");
         System.out.println("now, your object is filled with the colour "+obj3.getString());

         System.out.println("\n");
         //-----------------------------------
         System.out.println("the third class rectangle \n");

         square obj4 = new square(false,18);
        // obj4.setedeg(10);
         System.out.println("the value of the edge is "+obj4.getedge());
         System.out.println("the area of this rectangle is "+obj4.getsarea());
         System.out.println("the peri of this rectangle is "+obj4.getsperi());

         //obj4.setbol(true);
         System.out.println("your object is filled or not "+obj4.getbol());
        obj4.setstring("red");
         System.out.println("now, your object is filled with the colour "+obj4.getString());


         System.out.println("\n");
     }
}