我想在循环内的同一帧中显示不同的图像。 String pathName []包含图像的不同路径。运行此代码时,只有最后一张图像,即路径路径名[last]的图像才会显示在帧上,而我希望所有图像以连续的方式显示(延迟为1秒)。感谢帮助。
public void actionPerformed(ActionEvent event) {
int i=0;
while(i<5){
if(i>0){
Container labelParent = receiverImageLabel.getParent();
labelParent.remove(receiverImageLabel);
labelParent.validate();
labelParent.repaint();
}
try {
imageR = ImageIO.read(new File(pathName[i++])).getScaledInstance(512,512 , BufferedImage.SCALE_SMOOTH);
receivedImage = new ImageIcon(imageR);
}catch (IOException e) {
e.printStackTrace();
}
receiverImageLabel = new JLabel(receivedImage);
receiverFrame.getContentPane().add(BorderLayout.EAST,receiverImageLabel);
receiverFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
receiverFrame.setSize(800,700);
receiverFrame.setVisible(true);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
答案 0 :(得分:3)
您的问题很常见:您在事件线程上的Swing GUI中调用Thread.sleep(...)
,从而实际上使整个GUI处于休眠状态。
解决方案:Google使用Swing Timer并使用它来代替你的while循环/ Thread.sleep(...)
另外,如果图像不是太大,那么考虑一次读取它们(在后台线程中),将它们放入ImageIcons,然后在Swing中交换JLabel的ImageIconsand计时器。
例如,您可以执行以下操作:
ImageIcon[] icons = new ImageIcon[IMAGE_COUNT];
for (int i = 0; i < IMAGE_COUNT; i++) {
BufferedImage img = ImageIO.read(...); // read in the appropriate image
// ...... here manipulate the image if desired such as re-size it
icons[i] = new ImageIcon(img); // put it into an icon
}
别处:
int timerDelay = 1000;
new Timer(timerDelay, new ActionListener(){
int count = 0;
@Override
public void actionPerformed(ActionEvent e) {
if (count < IMAGE_COUNT) {
someLabel.setIcon(icons[count]);
count++;
} else {
// stop the timer
((Timer)e.getSource()).stop();
}
}
}).start();