An abstract class is the sketch of your real class

EXAMPLE (4 STEPS)

1. You make the abstract class, HOW?
   package AbstractClass;
   
   abstract class AbstractClass {
   
   	int x, y;
   
   	void moveTo(int newX, int newY) {
   		x = newX;
   		y = newY;
   	}
   
   	abstract void draw();
   
   	abstract void resize();
   
   }

2. You create the main class which EXTENDS the abstract class
   package AbstractClass;
   
   public class ExtensionClass extends AbstractClass {
   
   }

3. add unimplemented methods in the REAL class
4. RESULT
   

   ABSTRACT CLASS package AbstractClass; abstract class AbstractClass { int x, y; void moveTo(int newX, int newY) { x = newX; y = newY; } abstract void draw(); abstract void resize(); }

   EXTENSION CLASS package AbstractClass; public class ExtensionClass extends AbstractClass { @Override void draw() { // TODO Auto-generated method stub } @Override void resize() { // TODO Auto-generated method stub } }

   you see that the extension class only contains 2 methods, that is because the other method exists in the abstract method. If you make a main class you with the object ExtensionClass you see you can use all the methods.