public class Main {
public static void main(String[] args) {
GUI gui = new GUI();
GameHandler gameHandler = new GameHandler();
while (!gui.shouldStop()) {
while (gui.isRunning()) {
gameHandler.run();
}
}
}
}
import javax.swing.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
public class GUI extends JFrame implements KeyListener, WindowListener {
private JLabel label;
private boolean run = false;
private boolean stop = false;
public GUI() {
label = new JLabel("Not running.");
JPanel panel = new JPanel();
panel.setSize(300, 200);
panel.add(label);
setSize(300, 200);
add(panel);
addKeyListener(this);
addWindowListener(this);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setResizable(false);
setLocationRelativeTo(null);
setVisible(true);
}
public boolean isRunning() {
return run;
}
public boolean shouldStop() {
return stop;
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
String text = label.getText().equalsIgnoreCase("Not running.") ? "Running!" : "Not running.";
label.setText(text);
run = !run;
}
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void windowOpened(WindowEvent e) {
}
@Override
public void windowClosing(WindowEvent e) {
stop = true;
}
@Override
public void windowClosed(WindowEvent e) {
stop = true;
}
@Override
public void windowIconified(WindowEvent e) {
}
@Override
public void windowDeiconified(WindowEvent e) {
}
@Override
public void windowActivated(WindowEvent e) {
}
@Override
public void windowDeactivated(WindowEvent e) {
}
}
import java.awt.*;
public class GameHandler {
private Elektra elektra;
private Button popupExitButton;
public GameHandler() {
elektra = new Elektra();
popupExitButton = new Button(Button.EXIT_POPUP_IMAGE_PATH);
}
public void run() {
if (elektra.isAlive()) {
try {
new Robot().mouseMove(20, 90);
} catch (AWTException e) {
e.printStackTrace();
}
} else if (popupExitButton.isVisible()) {
try {
new Robot().mouseMove(90, 90);
} catch (AWTException e) {
e.printStackTrace();
}
}
}
}
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
public class Button {
BufferedImage image;
public Button(String fileName) {
try {
image = ImageIO.read(ClassLoader.getSystemResourceAsStream(fileName));
} catch (IOException e) {
e.printStackTrace();
}
}
public boolean isVisible() {
try {
return new ImageSearcher(new Robot().createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()))).containsSubImage(image);
} catch (AWTException e) {
e.printStackTrace();
}
return false;
}
public static final String EXIT_POPUP_IMAGE_PATH = "images/exitPopupButton.png";
}
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
public class Elektra {
String imagePath = "images/elektra.png";
BufferedImage image;
public Elektra() {
try {
image = ImageIO.read(ClassLoader.getSystemResourceAsStream(imagePath));
} catch (IOException e) {
e.printStackTrace();
}
}
public boolean isAlive() {
try {
return new ImageSearcher(new Robot().createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()))).containsSubImage(image);
} catch (AWTException e) {
e.printStackTrace();
}
return false;
}
}
我的程序应该检查屏幕上的某个图像，如果找到它应该移动鼠标。问题是，除非我记录消息，否则它永远不会起作用。我不知道为什么。
如果我添加System.out.println（“blah”）;在主类的每个while循环中，它都有效。但如果我不包括它们，它就不会。有人可以解释一下......？对我来说，为什么会发生这种情况毫无意义。当我使用调试器时也会发生这种情况。它在调试时有效，但在运行时不起作用。
何时起作用的例子：
public class Main {
public static void main(String[] args) {
GUI gui = new GUI();
GameHandler gameHandler = new GameHandler();
while (!gui.shouldStop()) {
System.out.println("..");
while (gui.isRunning()) {
System.out.println("..");
gameHandler.run();
}
}
}
}
答案 0 :(得分：2)
此 MSCCE的行为是否超出预期？ （我必须承认，我不清楚它应该做什么。看起来像一个有用的葡萄糖盒子。）
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
class Main {
public static void main(String[] args) {
GameHandler gameHandler = new GameHandler();
GUI gui = new GUI(gameHandler);
gameHandler.run();
}
}
class GUI extends JFrame implements KeyListener {
private JLabel label;
private boolean run = false;
private boolean stop = false;
GameHandler gameHandler;
public GUI(GameHandler gameHandler) {
this.gameHandler = gameHandler;
label = new JLabel("Not running.");
JPanel panel = new JPanel();
panel.setSize(300, 200);
panel.add(label);
setSize(300, 200);
add(panel);
addKeyListener(this);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setResizable(false);
setLocationRelativeTo(null);
setVisible(true);
}
public boolean isRunning() {
return run;
}
public boolean shouldStop() {
return stop;
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
String text = label.getText().equalsIgnoreCase("Not running.") ? "Running!" : "Not running.";
label.setText(text);
run = !run;
if (run) {
gameHandler.run();
} else {
gameHandler.stop();
}
}
}
@Override
public void keyReleased(KeyEvent e) {
}
}
class GameHandler {
private Elektra elektra;
private Button popupExitButton;
Timer timer;
public GameHandler() {
elektra = new Elektra();
popupExitButton = new Button("Button.EXIT_POPUP_IMAGE_PATH");
timer = new Timer(400, listener);
}
public void run() {
timer.start();
}
public void stop() {
timer.stop();
}
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
System.out.println("elektra.isAlive(): " + elektra.isAlive());
if (elektra.isAlive()) {
try {
new Robot().mouseMove(20, 90);
} catch (AWTException e) {
e.printStackTrace();
}
} else if (popupExitButton.isVisible()) {
try {
new Robot().mouseMove(90, 90);
} catch (AWTException e) {
e.printStackTrace();
}
}
}
};
}
class Button {
BufferedImage image;
public Button(String fileName) {
try {
//image = ImageIO.read(ClassLoader.getSystemResourceAsStream(fileName));
image = new Robot().createScreenCapture(new Rectangle(0,0,200,200));
} catch (Exception e) {
e.printStackTrace();
}
}
public boolean isVisible() {
try {
return new ImageSearcher(new Robot().createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()))).containsSubImage(image);
} catch (AWTException e) {
e.printStackTrace();
}
return false;
}
}
class Elektra {
BufferedImage image;
public Elektra() {
try {
image = new Robot().createScreenCapture(new Rectangle(0,0,200,50));
} catch (Exception e) {
e.printStackTrace();
}
}
public boolean isAlive() {
try {
return new ImageSearcher(
new Robot().createScreenCapture(
new Rectangle(Toolkit.getDefaultToolkit().getScreenSize())))
.containsSubImage(image);
} catch (AWTException e) {
e.printStackTrace();
}
return false;
}
}
class ImageSearcher {
BufferedImage mainImage;
public ImageSearcher(BufferedImage image) {
mainImage = image;
}
public boolean containsSubImage(BufferedImage subImage) {
int mainWidth = mainImage.getWidth();
int mainHeight = mainImage.getHeight();
int width = subImage.getWidth();
int height = subImage.getHeight();
for (int xOffset = 0; xOffset < mainWidth && xOffset + width < mainWidth; xOffset++) {
for (int yOffset = 0; yOffset < mainHeight && yOffset + height < mainHeight; yOffset++) {
if (picturesEquivalent(subImage, xOffset, yOffset)) {
return true;
}
}
}
return false;
}
private boolean picturesEquivalent(BufferedImage subImage, int xOffset, int yOffset) {
int mainWidth = mainImage.getWidth();
int mainHeight = mainImage.getHeight();
int width = subImage.getWidth();
int height = subImage.getHeight();
for (int x = 0; x < width && xOffset + x < mainWidth; x++) {
for (int y = 0; y < height && yOffset + y < mainHeight; y++) {
int mainRGB = mainImage.getRGB(xOffset + x, yOffset + y);
int subRGB = subImage.getRGB(x, y);
if (mainRGB != subRGB) {
return false;
}
}
}
return true;
}
}
答案 1 :(得分：1)
我无法在互联网上找到任何内容来专门支持这一点，但我认为你的打印语句会使程序变慢，足以让所有内容按正确的顺序运行。 Swing请求来自单个线程，因此事件很容易被绑定，就像Hover所说的那样，特别是如果你有很多像KeyEvents这样的输入事件。要解决这个问题，你可以尝试Thread.sleep，但是最好将程序重写为不使用while循环或不使用swing。
答案 2 :(得分：0)
使您的应用程序正确多线程。
尽量避免在事件调度程序主题（google this！）中工作。它应该仅用于更改UI。不要在其中运行等待循环，甚至可能使程序死锁。
花费更多时间来规划应用程序的工作时间以及等待事情发生的时间（以及如何）。您不希望您的应用程序浪费100％的CPU。