Methods not found in class ! HELP !

Question

Dear java People,
I am trying to draw, move, and erase balls in a ArrayList. I get an error message that says:
"BallDemo.java": Error #: 300 : method draw() not found in class java.lang.Object at line 126,
"BallDemo.java": Error #: 300 : method move() not found in class java.lang.Object at line 132
"BallDemo.java": Error #: 300 : method erase() not found in class java.lang.Object at line 138
below are the lines causing the errors and the method with the problem code
Thank you in advance
Stan
public void bounce()
        int ground = 400;   // position of the ground line
        int numberOfBalls = 0;
        myCanvas.setVisible(true);
        ArrayList balls = new ArrayList();
        // draw the ground
        myCanvas.drawLine(50, ground, 550, ground);
        //ex 5.50 (a)
        System.out.println("Type in the number of balls you would like to see bouncing and hit enter");
          numberOfBalls = input.readInt();
         //(b)
         for(int i = 0; i < numberOfBalls; i++)
           //(c) (d)
        Random rg = new Random(255);
         BouncingBall newBall =  new BouncingBall(i + 15, 0, 16, new Color(rg.nextInt(255),rg.nextInt(255),rg.nextInt(255)), ground, myCanvas);
         //add the ball to the ArrayList object
        balls.add(newBall);
       for(int i = 0; i < numberOfBalls; i++)
           balls.get(i).draw();
          // make them bounce
          boolean finished =  false;
          while(!finished) {
           myCanvas.wait(50);           // small delay
           balls.get(i).move();
            // stop once ball has travelled a certain distance on x axis
           // if(ball.getXPosition() >= 550 && ball2.getXPosition() >= 550)
                finished = true;
          balls.get(i).erase();
    }balls.get(i).draw();
balls.get(i).move();
balls.get(i).erase();

Answer 1

I actually caught this error myself !
I must be improving !
Cheers
Stan