java.lang.ArrayStoreException with new JPanel

Question

I have a problem:

public static JPanel regNewBodyPart(int i, int x, int y){

    //System.out.println(i);

    body[i] = new SnakeBlock();
    JPanel bp = body[i];
    //bp.setBackground(Color.GREEN);
    bp.setBounds(x, y, 20, 20);
    bp.setVisible(true);
    registeredBodyParts++;

    return(bp);

}

Throws an java.lang.ArrayStoreException, when I change

body[i] = new SnakeBlock(); to body[i] = new Block(); does not.

I dont what I've done false..

The SnakeBlock() and Block() classes are similar!

SnakeBlock / Block:

public class Block /* /SnakeBlock */ extends JPanel{

    public Block() /* /SnakeBlock */{

    }

    @Override
    protected void paintComponent(Graphics g){ 
        super.paintComponent(g);    
    } 
}

Answer 1

See the API:

Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects. For example, the following code generates an ArrayStoreException:

Object x[] = new String[3];
x[0] = new Integer(0);

To avoid this exception, define the body array as the appropriate data type, for example:

JPanel[] body = new JPanel[n];