How to store different types of objects in ArrayList

Question

I need to store different objects in the ArrayList. Objects are similar in nature but different and have different methods.

Circle c = new Circle();  
Cube s =          


        

Answer 1

This is what you have to do.

1. Define a Shape interface..

2. Implement the interface for Circle and Cube

3. Create shape objects for Circle and Cube and add these to arraylist..

Code below:

public interface Shape {

    public void draw();

}



public class Circle implements Shape {

@Override
public void draw() {
    System.out.println("Drawing Circle");

}

}



public class Cube implements Shape {

@Override
public void draw() {
    System.out.println("Drawing Cube");
}

}



public class Simulator{

public static void main(String[] s){

    Shape s1 = new Circle();
    Shape s2 = new Cube();

    ArrayList shapeList = new ArrayList();
    shapeList.add(s1);
    shapeList.add(s2);
}
}