我有一个Java游戏我需要在用户按下重启按钮时重启它。 我的代码片段：
package projectflappy;
//imports
public class TheGame extends JFrame implements MouseListener{
JPanel jp;
//declaration of the varibles
....
int x_ball = 30;
int y_ball = 200;
int x_width = 500;
int y_height = 500;
Label img = new Label();
int count = 5 , test = -4000;
int i; //for ball loop
Ellipse2D Ball;
int cord_xup1 = 175,cord_xdown1 = 175;
int cord_xup2 = 320,cord_xdown2 = 320;
int cord_xup3 = 460,cord_xdown3 = 460;
int cord_xup4 = 585,cord_xdown4 = 585;
int cord_xup5 = 700,cord_xdown5 = 700;
Boolean flag = true;
RoundRectangle2D up1,down1,up2,down2,up3,down3,up4,down4,up5,down5;
Font font = new Font("Matura MT Script Capitals",Font.ROMAN_BASELINE,40);
Font font1 = new Font("Matura MT Script Capitals",Font.ROMAN_BASELINE,20);
Font font3 = new Font("Matura MT Script Capitals",Font.ROMAN_BASELINE,20);
Font font4 = new Font("Matura MT Script Capitals",Font.ROMAN_BASELINE,10);
float das[] = {10.0f};
BasicStroke color = new BasicStroke(10,BasicStroke.CAP_ROUND,BasicStroke.JOIN_BEVEL,20.0f,das,0.0f);
private CellRendererPane crp = new CellRendererPane();
GradientPaint gp2 = new GradientPaint(20, 0,
Color.DARK_GRAY, 0, 10, Color.GRAY, true);
GradientPaint gp3 = new GradientPaint(30, 0,
Color.BLACK, 0, 20, Color.GREEN, true);
Toolkit kit = Toolkit.getDefaultToolkit();
//Getting the "background.jpg" image we have in the folder
Image background = kit.getImage("D:\\College\\Programs\\ProjectFLAPPY\\src\\projectflappy\\1.png");
JLabel a = new JLabel("Get Ready ! Click to Start.");
JLabel retry = new JLabel(new
ImageIcon("D:\\College\\Programs\\ProjectFLAPPY\\src\\projectflappy\\unnamed.png"));
//constructor
public TheGame() throws IOException
{
super("Simple Drawing");
setSize(x_width, y_height);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
jp = new DrawingPanel();
add(jp);
addMouseListener(this);
}
// Timer class initiazation--animating the ball
ActionListener action = new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
update();
repaint();
}
};
Timer t = new Timer(50,action);
public void mouseClicked(MouseEvent e) {
// mouse events for animating
}
// for drawing on the panel
class DrawingPanel extends JPanel{
private static final long serialVersionUID = 1L;
public DrawingPanel() {
setPreferredSize(new Dimension(300, 300));
setLayout(null);
retry.setVisible(false);
retry.setBounds(175,260,46,46);
a.setForeground(Color.YELLOW);
a.setFont(font1);
a.setVisible(true);
a.setBounds(105,200,300,100);
add(a);
add(retry);
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D d = (Graphics2D)g;
d.drawImage(background, -270,-30, this);
Ball = new Ellipse2D.Double(x_ball,y_ball,30,30);
d.setColor(Color.green);
d.setFont(font3);
up1 = new RoundRectangle2D.Double(cord_xup1,-5,30,175,20,20);
down1 = new RoundRectangle2D.Double(cord_xdown1,310,30,155,20,20);
up2 = new RoundRectangle2D.Double(cord_xup2,-5,30,200,20,20);
down2 = new RoundRectangle2D.Double(cord_xdown2,310,30,175,20,20);
up3 = new RoundRectangle2D.Double(cord_xup3,-5,30,230,20,20);
down3 = new RoundRectangle2D.Double(cord_xdown3,350,30,135,20,20);
up4 = new RoundRectangle2D.Double(cord_xup4,-5,30,115,20,20);
down4 = new RoundRectangle2D.Double(cord_xdown4,240,30,115,20,20);
d.setPaint(gp2);
d.setStroke(color);
d.fill(up1);
d.fill(down1);
d.fill(up2);
d.fill(down2);
d.fill(up3);
d.fill(down3);
d.fill(up4);
d.fill(down4);
d.setPaint(gp3);
d.setStroke(color);
d.fill(Ball);
d.setColor(Color.BLACK);
d.setFont(font1);
d.drawString(""+score ,200,50);
if( Ball.intersects(up1.getBounds()) || Ball.intersects(down1.getBounds()) || Ball.intersects(up2.getBounds()) || Ball.intersects(down2.getBounds()) || Ball.intersects(up3.getBounds()) || Ball.intersects(down3.getBounds()) || Ball.intersects(up4.getBounds()) || Ball.intersects(down4.getBounds()))
{
t.stop();
flag = false;
d.setColor(Color.red);
d.setFont(font);
d.drawString("Game Over : "+score ,100,250);
retry.setVisible(true);
}
****this is the retry button actually it is a JLabel i have used a mouse event over it
retry.addMouseListener( new MouseListener(){
@Override
public void mouseClicked(MouseEvent e) {
***i have tried this but doesnt work.
new DrawingPanel();
t.restart();
}
@Override
public void mousePressed(MouseEvent e) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseReleased(MouseEvent e) {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseEntered(MouseEvent e) {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseExited(MouseEvent e) {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
});
}
}
public void update()
{
cord_xdown1 -= 5;
cord_xup1 -= 5;
cord_xdown2 -= 5;
cord_xup2 -= 5;
cord_xdown3 -= 5;
cord_xup3 -= 5;
cord_xdown4 -= 5;
cord_xup4 -= 5;
cord_xdown5 -= 5;
cord_xup5 -= 5;
if( cord_xup1 <=-20)
{
cord_xup1 = 500;
cord_xdown1 = 500;
}
if( cord_xup2 <=-20)
{
cord_xup2 = 500;
cord_xdown2 = 500;
}
if( cord_xup3 <=-20)
{
cord_xup3 = 500;
cord_xdown3 = 500;
}
if( cord_xup4 <=-20)
{
cord_xup4 = 500;
cord_xdown4 = 500;
}
if( cord_xup5 <=-20)
{
cord_xup5 = 500;
cord_xdown5 = 500;
}
if(count >= 0)
{
y_ball = y_ball - 7;
count--;
if( y_ball == y_height)
{
t.stop();
}
}
else
{
y_ball = y_ball + 7;
if( y_ball == y_height-70)
{
t.stop();
}
}
if(cord_xdown1 == x_ball || cord_xdown2 == x_ball || cord_xdown3 == x_ball || cord_xdown4 == x_ball)
{
score = score+1;
}
}
public static void main(String[] args) throws IOException {
new TheGame();
}
}
我尝试了一些东西，但它没有用。给我一些关于如何解决这个问题的想法。 当我尝试做这样的事情时
new TheGame();
打开多个窗口。我不明白。 我已经删除了所有声明和Java导入以减少代码的长度。 请帮忙。感谢。
答案 0 :(得分：0)
将您的计时器代码和动作监听器移动到构造函数中：
//constructor
public TheGame() throws IOException
{
super("Simple Drawing");
setSize(x_width, y_height);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
jp = new DrawingPanel();
add(jp);
addMouseListener(this);
// Timer class initiazation--animating the ball
ActionListener action = new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
update();
repaint();
}
};
Timer t = new Timer(50,action);
}
尝试通过重启按钮onclick listener调用此方法：
retry.addMouseListener( new MouseListener(){
@Override
public void mouseClicked(MouseEvent e) {
restartApplication();
}
//------------------------------------------------------------------------------
public void restartApplication()
{
final String javaBin = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java";
final File currentJar = new File(TheGame.class.getProtectionDomain().getCodeSource().getLocation().toURI());
/* is it a jar file? */
if(!currentJar.getName().endsWith(".jar"))
return;
/* Build command: java -jar application.jar */
final ArrayList<String> command = new ArrayList<String>();
command.add(javaBin);
command.add("-jar");
command.add(currentJar.getPath());
final ProcessBuilder builder = new ProcessBuilder(command);
builder.start();
System.exit(0);
}
答案 1 :(得分：0)
重新构建您的程序，使您的显示代码独立于您的游戏代码
创建另一个类GameDisplay，它包含您的JFrame和其他swing组件，并管理鼠标和键盘事件。实际上，最好的做法是创建几个类来管理所有这些，但是一个就足够了。然后，让你的GameDisplay包含一个游戏，并调用游戏的方法来响应事件。完成后，只需构建一个新的Game实例并让GameDisplay开始使用新实例，即可重新启动游戏。