Class Bouncing Ball

admin abril 25, 2018 Class Bouncing Ball2018-04-25T19:04:44+00:00

java.lang.Object
- BouncingBall

```
public class BouncingBall
extends java.lang.Object
```
Class BouncingBall – a graphical ball that observes the effect of gravity. The ball has the ability to move. Details of movement are determined by the ball itself. It will fall downwards, accelerating with time due to the effect of gravity, and bounce upward again when hitting the ground. This movement can be initiated by repeated calls to the “move” method.

Version:

2016.02.29

Author:

Michael Kölling (mik), David J. Barnes, Bruce Quig

Constructor Summary

Constructors
Constructor and Description
`BouncingBall(int xPos, int yPos, int ballDiameter, java.awt.Color ballColor, int groundPos, Canvas drawingCanvas)` Constructor for objects of class BouncingBall

Method Summary

All MethodsInstance MethodsConcrete Methods
Modifier and Type	Method and Description
`void`	`draw()` Draw this ball at its current position onto the canvas.
`void`	`erase()` Erase this ball at its current position.
`int`	`getXPosition()` return the horizontal position of this ball
`int`	`getYPosition()` return the vertical position of this ball
`void`	`move()` Move this ball according to its position and speed and redraw.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BouncingBall
```
public BouncingBall(int xPos,
                    int yPos,
                    int ballDiameter,
                    java.awt.Color ballColor,
                    int groundPos,
                    Canvas drawingCanvas)
```
    Constructor for objects of class BouncingBall
    
    Parameters:
    
    xPos – the horizontal coordinate of the ball
    
    yPos – the vertical coordinate of the ball
    
    ballDiameter – the diameter (in pixels) of the ball
    
    ballColor – the color of the ball
    
    groundPos – the position of the ground (where the wall will bounce)
    
    drawingCanvas – the canvas to draw this ball on
- Method Detail
  - draw[Show source in BlueJ]
```
public void draw()
```
    Draw this ball at its current position onto the canvas.
  - erase[Show source in BlueJ]
```
public void erase()
```
    Erase this ball at its current position.
  - getXPosition[Show source in BlueJ]
```
public int getXPosition()
```
    return the horizontal position of this ball
  - getYPosition[Show source in BlueJ]
```
public int getYPosition()
```
    return the vertical position of this ball
  - move[Show source in BlueJ]
```
public void move()
```
    Move this ball according to its position and speed and redraw.