我必须在幻灯片中查看一些图像.. 为此我已经加载了一些图像并编写了这段代码。 在代码中我正在创建一个框架并添加一个标签,我在其中设置标签的图像图标。 但是当我运行我的程序时,框架会挂起。
这是我的代码吼叫。, 任何人都可以帮忙..!
public class Slideshow extends SwingWorker<Integer, Integer> {
File outputFolder;
ScreenVO screenVO;
ImageHelper helper;
public Slideshow(File outputFolder, ScreenVO screenVO) {
this.outputFolder = outputFolder;
this.screenVO = screenVO;
this.helper = new ImageHelper();
}
public void start(final File outputFolder, ScreenVO screenVO) {
try {
final JFrame frame = new JFrame();
final JPanel panel = new JPanel();
frame.add(panel);
frame.setVisible(true);
frame.setSize(new Dimension(200, 200));
frame.addKeyListener(new KeyListener() {
@Override
public void keyTyped(java.awt.event.KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(java.awt.event.KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyPressed(java.awt.event.KeyEvent e) {
if (e.getKeyCode() == e.VK_ESCAPE) {
frame.dispose();
}
}
});
//screenVO.getScreen().setFullScreenWindow(frame);
/* frame.setExtendedState(JFrame.MAXIMIZED_BOTH); */
File[] listOfFile = PhotoliciousUtils
.filterJPEGImagesFromFolder(outputFolder
.listFiles());
List list = PhotoliciousUtils.nameOfFiles(listOfFile);
while (!Thread.interrupted()) {
File[] listOfFiles = PhotoliciousUtils
.filterJPEGImagesFromFolder(outputFolder
.listFiles());
if (list.size() > listOfFiles.length) {
list.clear();
list = PhotoliciousUtils.nameOfFiles(listOfFiles);
} else {
for (final File file : listOfFiles) {
try {
panel.removeAll();
JLabel fullImage = new JLabel(helper
.createThumbnails(file));
panel.add(fullImage);
Thread.sleep(5000);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static ScreenVO[] fetchListOfScreen() {
ScreenVO[] listOfScreenVO = new ScreenVO[10];
try {
GraphicsDevice[] listOfScreen;
GraphicsEnvironment ge = GraphicsEnvironment
.getLocalGraphicsEnvironment();
listOfScreen = ge.getScreenDevices();
for (int i = 0; i < listOfScreen.length; i++) {
ScreenVO screenVO = new ScreenVO();
if (i == 0) {
screenVO.setName("Primary Screen" + " : "
+ listOfScreen[i].getDisplayMode().getWidth() + "x"
+ listOfScreen[i].getDisplayMode().getHeight());
} else {
screenVO.setName("Screen" + i + 1 + " : "
+ listOfScreen[i].getDisplayMode().getWidth() + "x"
+ listOfScreen[i].getDisplayMode().getHeight());
}
screenVO.setScreen(listOfScreen[i]);
listOfScreenVO[i] = screenVO;
}
} catch (Exception e) {
// TODO: handle exception
}
return listOfScreenVO;
}
@Override
protected Integer doInBackground() throws Exception {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
start(outputFolder, screenVO);
}
});
return null;
}
}
答案 0 :(得分:3)
您在invokeLater()
中呼叫doInBackground()
。这显然将代码放回到事件调度线程 - 正是您试图通过使用SwingWorker避免的。如果加载代码不是特别耗时,您只需使用摆动Timer就可以逃脱。否则,继续使用SwingWorker(或自定义线程)进行加载,并仅在EDT中访问swing组件。
此外,虽然需要在EDT中创建组件,但您应该尝试将其与幻灯片代码明确区分开来。它不属于后台任务。创建窗口和内容(用invokeLater包装),然后有一个不同的方法来更改图片(计时器方法是最简单的,所以我从那开始)。
答案 1 :(得分:1)
创建一段时间后会改变图像的线程
Thread t=new Thread(new Runnable(){
public void run(){
try{
Thead.sleep(1000);
//write code here to set image to jLabel
}catch(Exception e){
}
}
});
t.start()