我正在为我的应用程序制作启动画面。它只是由 Graphics2D 绘制的静态 BufferedImage,位于 JFrame 内部,没有任何装饰。我的问题是:窗口有时绘制不正确,这意味着它并不总是包含我的图像,有时它只是灰色的。我已经尝试在第二个线程中创建启动画面,但没有帮助。我可以在每一行调用 splashScreen.repaint()
,但这是无稽之谈......这是我的代码:
package SeriousSteve.MapEditor;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
/**
* Simple splash screen, contains only the image.
*
* @author m4tx3
*/
public class SplashScreen extends JFrame {
private BufferedImage image;
/**
* Constructor. Creates a window with splash screen, loads an image at the
* URL specified in imageURL, and finally displays this image.
*
* @param imageURL URL to the image that you want to put on the splash
* screen.
*/
public SplashScreen() {
super("Splash screen");
}
public void createSplashScreen(final URL imageURL) {
try {
image = ImageIO.read(imageURL);
} catch (IOException ex) {
Logger.getLogger(SplashScreen.class.getName()).
log(Level.SEVERE, null, ex);
}
setUndecorated(true);
setSize(image.getWidth(), image.getHeight());
setLocationRelativeTo(null);
setVisible(true);
createGraphics();
repaint();
}
/**
* Creates a graphics context and draws a splash screen.
*/
private void createGraphics() {
Graphics2D g = (Graphics2D) getGraphics();
g.drawImage(image, 0, 0, null);
}
/**
* Closes the splash screen and frees the memory taken by the image.
*
* Call this function when the loading is complete.
*/
public void close() {
setVisible(false);
image = null;
dispose();
}
}
和:
SplashScreen splashScreen = new SplashScreen();
splashScreen.createSplashScreen(getClass().getResource(
"Img/splash.png"));
顺便说一句,- 我正在创建自己的启动画面类,因为我在 1 个 jar 中有 2 个应用程序(游戏和 map 编辑器)...我只想在 map 编辑器中显示启动画面,所以我不能修改 list 文件。
问候
最佳答案
改用JLabel
。直接在框架上绘画是个坏主意。
看到这个,它每次都有效:
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
/**
* Simple splash screen, contains only the image.
*
* @author m4tx3
*/
public class SplashScreen extends JFrame {
/**
* Constructor. Creates a window with splash screen, loads an image at the URL specified in imageURL, and finally displays this image.
*
* @param imageURL
* URL to the image that you want to put on the splash screen.
*/
public SplashScreen() {
super("Splash screen");
}
public void createSplashScreen(final URL imageURL) {
JLabel splashLabel = new JLabel(new ImageIcon(imageURL));
add(splashLabel);
setSize(splashLabel.getPreferredSize());
setUndecorated(true);
setLocationRelativeTo(null);
setVisible(true);
repaint();
}
/**
* Closes the splash screen and frees the memory taken by the image.
*
* Call this function when the loading is complete.
*/
public void close() {
setVisible(false);
dispose();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
new SplashScreen().createSplashScreen(new URL(
"http://art.gnome.org/download/themes/splash_screens/1334/Splash-GnomeDarkSplashScreen.png"));
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
}
关于java - 由于没有重新粉刷,灰色启动画面,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10521192/