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abstract class GraphicObject {
    int x, y;
    ...
    void moveTo(int newX, int newY) {
        ...
    }
    void draw()
    {
     . . .
    }
    void resize()
    {
     . . .
    }
}

class Circle extends GraphicObject {
    void draw() {
        ...
    }
    void resize() {
        ...
    }
}
class Rectangle extends GraphicObject {
    void draw() {
        ...
    }
    void resize() {
        ...
    }
}

// File name AbstractClasses.java 
 package abstractclasses;
public class AbstractClasses extends Shape{
    
        public void Rectangle()
        {
            System.out.println("This is an Rectangle");
        }
    
    public static void main(String[] args) {               
        AbstractClasses objAbs = new AbstractClasses();
        objAbs.Rectangle();
        objAbs.Triangle();           
    }
    
}

// File name Shape.java and must be store in above package.
package abstractclasses;
public abstract class Shape {
        public void Triangle()
        {
            System.out.println("This is an Triangle of a Shape Class ");
        }
        public void Rectangle()
        {
            System.out.println("This is an Rectangle of a Shape Class ");
        }
}