Java 我怎样才能把球打到；“反弹”；从我的JSlider上？（我已经让它反弹了）
我在这个网站上搜索过，找不到任何关于从JSlider上弹起球的帖子。我修改了代码，使球从打开的窗口侧面反弹，并通过JSlider面板加速，但球（圆圈）落在JSlider面板后面。当它在窗口周围弹跳时，它通过JSLIDER，并且我希望球能够考虑JSlider作为窗口的底部。下面显示的代码是我的构造函数Java 我怎样才能把球打到；“反弹”；从我的JSlider上？（我已经让它反弹了）,java,swing,animation,jframe,jslider,Java,Swing,Animation,Jframe,Jslider,我在这个网站上搜索过，找不到任何关于从JSlider上弹起球的帖子。我修改了代码，使球从打开的窗口侧面反弹，并通过JSlider面板加速，但球（圆圈）落在JSlider面板后面。当它在窗口周围弹跳时，它通过JSLIDER，并且我希望球能够考虑JSlider作为窗口的底部。下面显示的代码是我的构造函数 import java.awt.*; import java.awt.event.*; import javax. swing. *; import javax.swing.event.*; pub
import java.awt.*;
import java.awt.event.*;
import javax. swing. *;
import javax.swing.event.*;
public class SpeedControlPanel extends JPanel
{
private final int WIDTH = 600;
private final int HEIGHT = 400;
private final int BALL_SIZE = 50;
private Circle bouncingBall; // the object that moves
private Timer timer;
private int moveX, moveY; // increment to move each time
private JPanel pSpeeder;
private JSlider sSpeeder;
private JLabel lSpeeder;
Dimension height;
// --------------------------------------------
// Sets up the panel, including the timer
// for the animation
// --------------------------------------------
public SpeedControlPanel ()
{
timer = new Timer(30, new ReboundListener());
this.setLayout (new BorderLayout());
bouncingBall = new Circle(BALL_SIZE);
moveX = moveY = 5;
// Set up a slider object here
setPreferredSize (new Dimension (WIDTH, HEIGHT));
setBackground(Color.black);
lSpeeder = new JLabel("Timer Delay");
lSpeeder.setAlignmentX(Component.LEFT_ALIGNMENT);
sSpeeder = new JSlider(JSlider.HORIZONTAL, 0, 200, 30);
sSpeeder.setMajorTickSpacing(40);
sSpeeder.setMinorTickSpacing(10);
sSpeeder.setPaintTicks(true);
sSpeeder.setPaintLabels(true);
sSpeeder.setAlignmentX(Component.LEFT_ALIGNMENT);
sSpeeder.addChangeListener(new SlideListener());
pSpeeder = new JPanel();
pSpeeder.add(lSpeeder);
pSpeeder.add(sSpeeder);
add(pSpeeder, BorderLayout.SOUTH);
timer.start();
}
// ---------------------
// Draw the ball
// ---------------------
public void paintComponent (Graphics page)
{
super.paintComponent (page);
bouncingBall.draw(page);
}
// ***************************************************
// An action listener for the timer
// ***************************************************
public class ReboundListener implements ActionListener
{
// ----------------------------------------------------
// actionPerformed is called by the timer -- it updates
// the position of the bouncing ball
// ----------------------------------------------------
public void actionPerformed(ActionEvent action)
{
bouncingBall.move(moveX, moveY);
// change direction if ball hits a side
int x = bouncingBall.getX();
int y = bouncingBall.getY();
int slidePanelHt = pSpeeder.getSize().height;
if (x < 0 || x >= WIDTH - BALL_SIZE)
moveX = moveX * -1;
if (y <= 0 || y >= HEIGHT - BALL_SIZE)
moveY = moveY * -1;
repaint();
}
}
// ***************************************************
// A change listener for the slider.
// ***************************************************
private class SlideListener implements ChangeListener
{
// ------------------------------------------------
// Called when the state of the slider has changed;
// resets the delay on the timer.
// ------------------------------------------------
public void stateChanged (ChangeEvent event)
{
timer.setDelay(sSpeeder.getValue());
}
}
}
import java.awt.*；
导入java.awt.event.*；
导入javax。摇摆。*；
导入javax.swing.event.*；
公共类速度控制面板扩展JPanel
{
专用最终整数宽度=600；
私人最终内部高度=400；
私人最终整型球尺寸=50；
private Circle bouncingBall；//移动的对象
私人定时器；
private int moveX，moveY；//每次移动的增量
私人JPanel pSpeeder；
私用JSlider sSpeeder；
私用JLabel-lSpeeder；
尺寸高度；
// --------------------------------------------
//设置面板，包括计时器
//对于动画
// --------------------------------------------
公共速度控制面板（）
{
计时器=新计时器（30，新侦听器（））；
this.setLayout（新的BorderLayout（））；
bouncingBall=新圆（球大小）；
moveX=moveY=5；
//在此处设置滑块对象
setPreferredSize（新尺寸（宽度、高度））；
挫折背景（颜色：黑色）；
lSpeeder=新的JLabel（“计时器延迟”）；
lSpeeder.setAlignmentX（组件左对齐）；
sSpeeder=新的JSlider（JSlider.HORIZONTAL，0,200,30）；
sSpeeder.setMajorTickSpacing（40）；
sSpeeder.setMinorTickSpacing（10）；
sSpeeder.setPaintTicks（真）；
sSpeeder.setPaintLabels（真）；
sSpeeder.setAlignmentX（组件左对齐）；
sSpeeder.addChangeListener（新的SlideListener（））；
pspeder=newjpanel（）；
pSpeeder.add（lSpeeder）；
pSpeeder.add（sSpeeder）；
添加（PSpeder，BorderLayout.SOUTH）；
timer.start（）；
}
// ---------------------
//抽签
// ---------------------
公共组件（图形页）
{
super.paintComponent（第页）；
弹跳球。绘图（第页）；
}
// ***************************************************
//计时器的操作侦听器
// ***************************************************
公共类侦听器实现ActionListener
{
// ----------------------------------------------------
//actionPerformed由计时器调用--它会更新
//弹跳球的位置
// ----------------------------------------------------
已执行的公共无效操作（操作事件操作）
{
弹跳球。移动（moveX，moveY）；
//如果球撞到一边，改变方向
int x=bouncingBall.getX（）；
int y=bouncingBall.getY（）；
int slidePanelHt=pspeder.getSize（）.height；
如果（x<0 | | x>=宽度-球大小）
moveX=moveX*-1；
如果（y=高度-球尺寸）
moveY=moveY*-1；
重新油漆（）；
}
}
// ***************************************************
//滑块的更改侦听器。
// ***************************************************
私有类SlideListener实现ChangeListener
{
// ------------------------------------------------
//当滑块的状态已更改时调用；
//重置计时器上的延迟。
// ------------------------------------------------
公共无效状态已更改（ChangeEvent事件）
{
timer.setDelay（sSpeeder.getValue（））；
}
}
}
完成我建议通过实现将gui与其控件分离。
具有保存视图（gui）需要的所有信息的模型： 具有使用模型显示gui的视图。请注意，滑块和动画位于两个独立的
JPanel为了方便和简单，可以将以下代码复制粘贴到名为
BouncingBall.javaimport java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.Timer;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/*
* The controller wires the view and model, and does the processing.
*/
public class BouncingBall {
private final int BALL_SIZE = 25;
private int moveX =5, moveY =5; // increment to move each time
private final Timer timer;
private final Model model;
private JPanel view;
BouncingBall() {
model = new Model(BALL_SIZE);
timer = new Timer(model.getDelay(), new ReboundListener());
makeAndShowGui();
timer.start();
}
private void makeAndShowGui() {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
view = new View(model);
window.add(view);
window.pack();
window.setResizable(false);
window.setVisible(true);
}
private void updateGui() {
// change direction if ball hits a side
int x = model.getX();
int y = model.getY();
if (x < 0 || x >= model.getWidth() - model.getRaduis()*2) {
moveX = moveX * -1;
}
if (y <= 0 || y >= model.getHeiht() - model.getRaduis()*2) {
moveY = moveY * -1;
}
model.setX(x+moveX);
model.setY(y+moveY);
timer.setDelay(model.getDelay()); //update timer
view.repaint();
}
// ***************************************************
// An action listener for the timer
// ***************************************************
public class ReboundListener implements ActionListener {
// ----------------------------------------------------
// actionPerformed is called by the timer -- it updates
// the position of the bouncing ball
// ----------------------------------------------------
@Override
public void actionPerformed(ActionEvent action) {
updateGui();
}
}
public static void main(String[] args) {
new BouncingBall();
}
}
/*
* The model contains the information for the view and information from the view
* The model is independent of the user interface.
*/
class Model{
private final int WIDTH = 600;
private final int HEIGHT = 400;
private int x,y, delay;
private final int radius;
Model(int radius) {
this.radius = radius;
x= radius; y= radius; delay = 30; //default values
}
void move(int moveX, int moveY) {
x += moveX; y+= moveY;
}
int getX() { return x; }
void setX(int x) { this.x = x; }
int getY() {return y;}
void setY(int y) { this.y = y; }
int getRaduis() {return radius;}
int getDelay() {return delay;}
void setDelay(int delay) {this.delay = delay;}
int getWidth() {return WIDTH;}
int getHeiht() {return HEIGHT; }
}
/*
* View is just that: a dumb as possible display
*/
class View extends JPanel {
View(Model model) {
setLayout (new BorderLayout());
add(new BallPane(model)); //as explained in Hovercraft Full Of Eels
add(new SliderPane(model), BorderLayout.PAGE_END); //answer
}
class BallPane extends JPanel {
private final Model model;
BallPane(Model model) {
this.model = model;
setPreferredSize (new Dimension (model.getWidth(), model.getHeiht()));
setBackground(Color.black);
}
// ---------------------
// Draw the ball
// ---------------------
@Override
public void paintComponent (Graphics page) {
super.paintComponent (page);
page.setColor(Color.CYAN);
page.fillOval(model.getX(), model.getY(), model.getRaduis()*2, model.getRaduis()*2);
}
}
class SliderPane extends JPanel {
private final Model model;
private final JSlider sSpeeder;
SliderPane(Model model) {
this.model = model;
sSpeeder = new JSlider(JSlider.HORIZONTAL, 0, 200, 30);
sSpeeder.setMajorTickSpacing(40);
sSpeeder.setMinorTickSpacing(10);
sSpeeder.setPaintTicks(true);
sSpeeder.setPaintLabels(true);
sSpeeder.setAlignmentX(Component.LEFT_ALIGNMENT);
sSpeeder.addChangeListener(new SlideListener());
add(sSpeeder);
}
// ***************************************************
// A change listener for the slider.
// ***************************************************
private class SlideListener implements ChangeListener
{
// ------------------------------------------------
// Called when the state of the slider has changed;
// resets the delay on the timer.
// ------------------------------------------------
@Override
public void stateChanged (ChangeEvent event)
{
model.setDelay(sSpeeder.getValue());
}
}
}
}
导入java.awt.BorderLayout；
导入java.awt.Color；
导入java.awt.Component；
导入java.awt.Dimension；
导入java.awt.Graphics；
导入java.awt.event.ActionEvent；
导入java.awt.event.ActionListener；
导入javax.swing.JFrame；
导入javax.swing.JPanel；
导入javax.swing.JSlider；
导入javax.swing.Timer；
导入javax.swing.event.ChangeEvent；
导入javax.swing.event.ChangeListener；
/*
*控制器连接视图和模型，并进行处理。
*/
公开课弹跳球{
私人最终整型球尺寸=25；
private int moveX=5，moveY=5；//每次移动的增量
私人最终定时器；
私有最终模型；
私人JPanel视图；
弹跳球{
型号=新型号（球尺寸）；
计时器=新计时器（model.getDelay（），new-listener（））；
makeAndShowGui（）；
timer.start（）；
}
私有void makeAndShowGui（）{
JFrame窗口=新JFrame（）；
setDefaultCloseOperation（JFrame.EXIT_
/*
* View is just that: a dumb as possible display
*/
class View extends JPanel {
View(Model model) {
setLayout (new BorderLayout());
add(new BallPane(model)); //as explained in Hovercraft Full Of Eels
add(new SliderPane(model), BorderLayout.PAGE_END); //answer
}
class BallPane extends JPanel {
private final Model model;
BallPane(Model model) {
this.model = model;
setPreferredSize (new Dimension (model.getWidth(), model.getHeiht()));
setBackground(Color.black);
}
// ---------------------
// Draw the ball
// ---------------------
@Override
public void paintComponent (Graphics page) {
super.paintComponent (page);
page.setColor(Color.CYAN);
page.fillOval(model.getX(), model.getY(), model.getRaduis()*2, model.getRaduis()*2);
}
}
class SliderPane extends JPanel {
private final Model model;
private final JSlider sSpeeder;
SliderPane(Model model) {
this.model = model;
sSpeeder = new JSlider(JSlider.HORIZONTAL, 0, 200, 30);
sSpeeder.setMajorTickSpacing(40);
sSpeeder.setMinorTickSpacing(10);
sSpeeder.setPaintTicks(true);
sSpeeder.setPaintLabels(true);
sSpeeder.setAlignmentX(Component.LEFT_ALIGNMENT);
sSpeeder.addChangeListener(new SlideListener());
add(sSpeeder);
}
// ***************************************************
// A change listener for the slider.
// ***************************************************
private class SlideListener implements ChangeListener
{
// ------------------------------------------------
// Called when the state of the slider has changed;
// resets the delay on the timer.
// ------------------------------------------------
@Override
public void stateChanged (ChangeEvent event)
{
model.setDelay(sSpeeder.getValue());
}
}
}
}
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.Timer;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/*
* The controller wires the view and model, and does the processing.
*/
public class BouncingBall {
private final int BALL_SIZE = 25;
private int moveX =5, moveY =5; // increment to move each time
private final Timer timer;
private final Model model;
private JPanel view;
BouncingBall() {
model = new Model(BALL_SIZE);
timer = new Timer(model.getDelay(), new ReboundListener());
makeAndShowGui();
timer.start();
}
private void makeAndShowGui() {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
view = new View(model);
window.add(view);
window.pack();
window.setResizable(false);
window.setVisible(true);
}
private void updateGui() {
// change direction if ball hits a side
int x = model.getX();
int y = model.getY();
if (x < 0 || x >= model.getWidth() - model.getRaduis()*2) {
moveX = moveX * -1;
}
if (y <= 0 || y >= model.getHeiht() - model.getRaduis()*2) {
moveY = moveY * -1;
}
model.setX(x+moveX);
model.setY(y+moveY);
timer.setDelay(model.getDelay()); //update timer
view.repaint();
}
// ***************************************************
// An action listener for the timer
// ***************************************************
public class ReboundListener implements ActionListener {
// ----------------------------------------------------
// actionPerformed is called by the timer -- it updates
// the position of the bouncing ball
// ----------------------------------------------------
@Override
public void actionPerformed(ActionEvent action) {
updateGui();
}
}
public static void main(String[] args) {
new BouncingBall();
}
}
/*
* The model contains the information for the view and information from the view
* The model is independent of the user interface.
*/
class Model{
private final int WIDTH = 600;
private final int HEIGHT = 400;
private int x,y, delay;
private final int radius;
Model(int radius) {
this.radius = radius;
x= radius; y= radius; delay = 30; //default values
}
void move(int moveX, int moveY) {
x += moveX; y+= moveY;
}
int getX() { return x; }
void setX(int x) { this.x = x; }
int getY() {return y;}
void setY(int y) { this.y = y; }
int getRaduis() {return radius;}
int getDelay() {return delay;}
void setDelay(int delay) {this.delay = delay;}
int getWidth() {return WIDTH;}
int getHeiht() {return HEIGHT; }
}
/*
* View is just that: a dumb as possible display
*/
class View extends JPanel {
View(Model model) {
setLayout (new BorderLayout());
add(new BallPane(model)); //as explained in Hovercraft Full Of Eels
add(new SliderPane(model), BorderLayout.PAGE_END); //answer
}
class BallPane extends JPanel {
private final Model model;
BallPane(Model model) {
this.model = model;
setPreferredSize (new Dimension (model.getWidth(), model.getHeiht()));
setBackground(Color.black);
}
// ---------------------
// Draw the ball
// ---------------------
@Override
public void paintComponent (Graphics page) {
super.paintComponent (page);
page.setColor(Color.CYAN);
page.fillOval(model.getX(), model.getY(), model.getRaduis()*2, model.getRaduis()*2);
}
}
class SliderPane extends JPanel {
private final Model model;
private final JSlider sSpeeder;
SliderPane(Model model) {
this.model = model;
sSpeeder = new JSlider(JSlider.HORIZONTAL, 0, 200, 30);
sSpeeder.setMajorTickSpacing(40);
sSpeeder.setMinorTickSpacing(10);
sSpeeder.setPaintTicks(true);
sSpeeder.setPaintLabels(true);
sSpeeder.setAlignmentX(Component.LEFT_ALIGNMENT);
sSpeeder.addChangeListener(new SlideListener());
add(sSpeeder);
}
// ***************************************************
// A change listener for the slider.
// ***************************************************
private class SlideListener implements ChangeListener
{
// ------------------------------------------------
// Called when the state of the slider has changed;
// resets the delay on the timer.
// ------------------------------------------------
@Override
public void stateChanged (ChangeEvent event)
{
model.setDelay(sSpeeder.getValue());
}
}
}
}