我希望在生命结束后在pacman游戏中显示GameOver图像.但我调用paintGameOverScreen(Graphics g),然后我需要初始化g.有没有其他方法可以做到这一点？
这是我的Lives课程
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
public class Lives{
private int lives;
public Lives() {
lives = 1;
}
public void removeLife() {
lives--;
if(lives==0){
System.out.println("END GAME");
paintGameOverScreen(g);
System.exit(0);
}
}
public void paintGameOverScreen(Graphics g) {
ImageIcon i = new ImageIcon("src\image");
Image image = i.getimage();
int x = 0;
int y = 0;
g.drawImage(image,x,y,100,null);
}
public void paint(Graphics g) {
g.setColor(Color.WHITE);
g.fillRect(5*20,25*20,30);
g.setColor(Color.BLACK);
String result = "Lives: " + lives;
g.drawString(result,6*20,26*20);
}
}
解决方法
你永远不会自己调用paint()或paintComponent(),你总是通过repaint()来处理设置相应的Graphics
只是为了展示@mKorbel所指的内容：
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
public class Lives extends JPanel {
private int lives;
private ImageIcon gameOverImage;
public Lives() {
try {
gameOverImage = new ImageIcon(new URL("http://imgup.motion-twin.com/dinorpg/0/f/77acf80b_989624.jpg"));
} catch (MalformedURLException e) {
// Todo Auto-generated catch block
e.printstacktrace();
}
lives = 5;
}
public void removeLife() {
if (lives > 0) {
lives--;
System.out.println("Left lives: " + lives);
repaint();
}
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (lives > 0) {
System.out.println("Still have " + lives + " lives");
g.setColor(Color.WHITE);
g.fillRect(5 * 20,25 * 20,30);
g.setColor(Color.BLACK);
String result = "Lives: " + lives;
g.drawString(result,6 * 20,26 * 20);
} else if (gameOverImage != null) {
System.out.println("Game over");
int x = (getWidth() - gameOverImage.getIconWidth()) / 2;
int y = (getHeight() - gameOverImage.getIconHeight()) / 2;
g.drawImage(gameOverImage.getimage(),gameOverImage.getIconWidth(),gameOverImage.getIconHeight(),this);
}
}
@Override
public Dimension getPreferredSize() {
return new Dimension(800,600);
}
public static void main(String[] args) {
SwingUtilities.invokelater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame(Lives.class.getSimpleName());
frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
final Lives lives = new Lives();
frame.add(lives);
frame.pack();
frame.setVisible(true);
// Dummy timer that reduces the lives every second. For demo purposes only of course
Timer t = new Timer(1000,new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
lives.removeLife();
}
});
t.start();
}
});
}
}