我正在尝试让JButton'返回'返回游戏，我在游戏运行时运行布尔打印。单击按钮后它开始运行，但我的线程的其余部分被冻结，为什么会这样，我该如何解决这个问题？
我尝试添加一个显示运行状态的调试行（在while循环和if（运行）语句内部，在if语句之外），在单击后退按钮后，它显示运行为true。这应该表明线程的其余部分应该正常工作，但事实并非如此。因此，当我点击转义键时，它将运行设置为false并显示按钮。当我单击后退时，再次将运行设置为true并重新绘制屏幕。检查地点说它再次运行但屏幕仍然不接受用户输入或更新。
private static final long serialVersionUID = 1L;
static JPanel panel;
Client client = Multiplayer.client;
// map variables
ArrayList<Integer> world = new ArrayList<Integer>();
int width, height;
int visibleWidth = 20;
int visibleHeight = 20;
int count = 0;
static boolean running = true;
// map variables
int xOffset = 0, yOffset = 0;
static double speed = 1;
// game loop variables
double interpolation = 0;
final int TICKS_PER_SECOND = 25;
final int SKIP_TICKS = 1000 / TICKS_PER_SECOND;
final int MAX_FRAMESKIP = 5;
// option menu
JButton exit;
static JButton back;
JButton options;
Player player = Multiplayer.client.player;
public MainPanel(int width, int height) {
this.width = width;
this.height = height;
this.panel = this;
panel.setSize(new Dimension(width, height));
panel.requestFocus();
// add option menu buttons
panel.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
exit = new Button("Exit", Loader.cropImage(Loader.loadImage("/SpriteSheet.png"), 7, 0, 96, 32),
Loader.cropImage(Loader.loadImage("/SpriteSheet.png"), 9, 0, 96, 32));
back = new Button("Back", Loader.cropImage(Loader.loadImage("/SpriteSheet.png"), 7, 0, 96, 32),
Loader.cropImage(Loader.loadImage("/SpriteSheet.png"), 9, 0, 96, 32));
options = new Button("Options", Loader.cropImage(Loader.loadImage("/SpriteSheet.png"), 7, 0, 96, 32),
Loader.cropImage(Loader.loadImage("/SpriteSheet.png"), 9, 0, 96, 32));
gbc.insets = new Insets(1, 10, 1, 10);
gbc.gridx = 0;
gbc.gridy = 0;
options.setVisible(false);
exit.setVisible(false);
back.setVisible(false);
panel.add(options, gbc);
gbc.gridy = 1;
panel.add(back, gbc);
gbc.gridy = 2;
panel.add(exit, gbc);
panel.setVisible(true);
back.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
clearButtons();
return;
}
});
try {
WorldGenerator(Multiplayer.client.f);
} catch (IOException e) {
e.printStackTrace();
}
}
public void clearButtons() {
running = true;
options.setVisible(false);
exit.setVisible(false);
back.setVisible(false);
this.repaint();
}
public void WorldGenerator(File file) throws IOException {
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
String line = "";
while ((line = br.readLine()) != null) {
// System.out.println(line);
for (int i = 0; i < line.length(); i++) {
world.add(Integer.parseInt(line.charAt(i) + ""));
}
}
br.close();
fr.close();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
// render map
for (int y = 0; y < Multiplayer.client.worldHeight; y++) {
for (int x = 0; x < Multiplayer.client.worldWidth; x++) {
if (count == world.size()) {
count = 0;
}
g.drawImage(Tile.getTexture(world.get(count)), (x * Tile.WIDTH) + xOffset, (y * Tile.HEIGHT) + yOffset,
null);
count++;
}
}
// render player and position
for (int i = 0; i < Multiplayer.client.entityList.size(); i++) {
if (Multiplayer.client.entityList.get(i) instanceof Player) {
if (Multiplayer.client.entityList.get(i).getUUID() == player.getUUID()) {
g.drawImage(player.getImg(), player.getX(), player.getY(), null);
g.setColor(Color.RED);
// player bounds box
g.drawRect(player.getX(), player.getY(), player.width, player.height);
// System.out.println(xOffset + ", " + yOffset);
} else {
g.drawImage(Multiplayer.client.entityList.get(i).getImg(),
Multiplayer.client.entityList.get(i).getX(), Multiplayer.client.entityList.get(i).getY(),
null);
}
}
}
//options menu backdrop
if(!running) {
g.setColor(new Color(0,0,0,85));
g.fillRect(0, 0, panel.getWidth(), panel.getHeight());
}
}
@Override
public void run() {
long lastLoopTime = System.nanoTime();
final int TARGET_FPS = 60;
final long OPTIMAL_TIME = 1000000000 / TARGET_FPS;
long lastFpsTime = 0;
while (true) {
long now = System.nanoTime();
long updateLength = now - lastLoopTime;
lastLoopTime = now;
double delta = updateLength / ((double) OPTIMAL_TIME);
lastFpsTime += updateLength;
if (lastFpsTime >= 10000000) {
lastFpsTime = 0;
System.out.println(running);
// escape - options menu
if (Keyboard.keys.contains(27) ) {
if(running) {
running = false;
back.setVisible(true);
this.repaint();
}
else {
running = true;
back.setVisible(false);
this.repaint();
}
try {
Thread.sleep(300);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
// left - done
if (Keyboard.keys.contains(37)) {
if (player.getX() < panel.getWidth() / 6 && xOffset < 0) {
xOffset += speed;
player.setX(panel.getWidth() / 6);
}
if (Tile.getTile(Tile.getTileAt(((player.getX() - 1) / Tile.WIDTH),
(player.getY() / Tile.HEIGHT))).isSolid
|| Tile.getTile(Tile.getTileAt(((player.getX() - 1) / Tile.WIDTH),
(player.getY() / Tile.WIDTH) + ((player.height / 2) / Tile.HEIGHT))).isSolid
|| Tile.getTile(Tile.getTileAt(((player.getX() - 1) / Tile.WIDTH),
((player.getY() / Tile.HEIGHT) + (player.height / Tile.HEIGHT)))).isSolid) {
} else {
player.setX((int) (player.getX() - speed));
client.sendMessage("0005;" + client.uuid + ";" + player.getX() + ";" + player.getY());
}
}
// right - done
if (Keyboard.keys.contains(39)) {
if (player.getX() + player.getWidth() > (panel.getWidth() / 6) * 5
&& (xOffset * -1) + panel.getWidth() < client.worldWidth * Tile.WIDTH) {
xOffset -= speed;
player.setX(((panel.getWidth() / 6) * 5) - player.getWidth());
}
if (Tile.getTile(Tile.getTileAt(
(((player.getX() + ((xOffset) * -1) + 1) / Tile.WIDTH) + (player.width / Tile.WIDTH)),
(player.getY() / Tile.HEIGHT))).isSolid
|| Tile.getTile(Tile.getTileAt(
(((player.getX() + ((xOffset) * -1) + 1) / Tile.WIDTH)
+ (player.width / Tile.WIDTH)),
(player.getY() / Tile.HEIGHT) + ((player.height / 2) / Tile.HEIGHT))).isSolid
|| Tile.getTile(Tile.getTileAt(
(((player.getX() + ((xOffset) * -1) + 1) / Tile.WIDTH)
+ (player.width / Tile.WIDTH)),
(player.getY() / Tile.HEIGHT) + (player.height / Tile.HEIGHT))).isSolid) {
} else {
player.setX((int) (player.getX() + speed));
client.sendMessage("0005;" + client.uuid + ";" + player.getX() + ";" + player.getY());
}
}
// up
if (Keyboard.keys.contains(38)) {
if (player.getY() < panel.getHeight() / 8 && yOffset < 0) {
yOffset += speed;
player.setY(panel.getHeight() / 8);
}
if (Tile.getTile(Tile.getTileAt((player.getX() / Tile.WIDTH),
((player.getY() + ((yOffset) * -1) - 2) / Tile.HEIGHT))).isSolid
|| Tile.getTile(
Tile.getTileAt((player.getX() / Tile.WIDTH) + (player.width / Tile.WIDTH),
((player.getY() + ((yOffset) * -1) - 2) / Tile.HEIGHT))).isSolid) {
} else {
player.setY((int) (player.getY() - speed));
client.sendMessage("0005;" + client.uuid + ";" + player.getX() + ";" + player.getY());
}
}
// down
if (Keyboard.keys.contains(40)) {
if (player.getY() + player.getHeight() > (panel.getHeight() / 8) * 7
&& (yOffset * -1) + panel.getHeight() < client.worldHeight * Tile.HEIGHT) {
yOffset -= speed;
player.setY(((panel.getHeight() / 8) * 7) - player.getHeight());
}
if (Tile.getTile(Tile.getTileAt((player.getX() / Tile.WIDTH),
((player.getY() + ((yOffset) * -1) + 1) / Tile.HEIGHT)
+ (player.height / Tile.HEIGHT))).isSolid
|| Tile.getTile(
Tile.getTileAt((player.getX() / Tile.WIDTH) + (player.width / Tile.WIDTH),
((player.getY() + ((yOffset * -1)) + 1) / Tile.HEIGHT)
+ (player.height / Tile.HEIGHT))).isSolid) {
} else {
player.setY((int) (player.getY() + speed));
client.sendMessage("0005;" + client.uuid + ";" + player.getX() + ";" + player.getY());
}
}
this.repaint();
}
}
}
}