出于某种原因,在添加菜单后我的 jFrame 不再弹出。我有什么遗漏的吗?我正在尝试制作一个在游戏开始之前弹出的菜单,其中包含“播放”按钮以及允许用户输入用户名的文本框。
关于如何修复我的代码有什么建议吗?谢谢!
这是我的菜单类:
import java.awt.Color;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JPanel;
public class Menu extends JPanel{
private static final long serialVersionUID = 1L;
public Menu() {
JPanel buttonPanel = new JPanel(new GridLayout());
JButton play = new JButton();
JButton help = new JButton();
buttonPanel.add(play);
buttonPanel.add(help);
setFocusable(true);
addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
Game.started = true;
}
});
}
public void paint (Graphics g) {
super.paint(g);
g.setColor(Color.black);
g.fillRect(400, 400, Game.WIDTH, Game.HEIGHT);
}
}
这是我运行程序的主类:
import java.awt.BorderLayout;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class Main implements Runnable{
public void run() {
final JFrame frame = new JFrame();
frame.setTitle("Flying Square");
frame.setSize(Game.WIDTH, Game.HEIGHT);
//The menu
final Menu menu = new Menu();
final Game game = new Game();
frame.add(menu, BorderLayout.CENTER);
menu.setVisible(true);
try {while (Game.started == false) {
Thread.sleep(10);
}} catch (InterruptedException e){
e.printStackTrace();
}
frame.remove(menu);
//Main playing area
frame.add(game, BorderLayout.CENTER);
game.setVisible(true);
frame.revalidate();
// Put the frame on the screen
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
// add listeners
frame.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
flyingObject.jump();
}
});
frame.addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_SPACE)
{
flyingObject.jump();
}
}
});
// Start game
Game.reset();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Main());
}
}
最佳答案
所以,这个...
try {while (Game.started == false) {
Thread.sleep(10);
}} catch (InterruptedException e){
e.printStackTrace();
}
正在阻塞事件调度线程,阻止它处理任何事件并基本上导致您的程序挂起。
这不是您想要处理用户响应的方式。您的Menu
应该监视用户的输入,可能通过一个或多个ActionListener
,当触发某个操作时,它应该通知某种 Controller ,即 Controller 然后可以决定需要做什么,例如切换面板
您需要将代码分解为至少三个 block ,“游戏”、“菜单”和“ Controller ”,这样会更容易管理,而不是尝试改进功能到现有代码中
建议看看
- How to Use CardLayout帮助您方便切换 View
- How to Use Key Bindings而不是
KeyListener
- Model-View-Controller
- Observer Pattern
关于java - 在游戏开始前添加菜单,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43564695/