public class BlurAndSharpenDemo extends JFrame implements ActionListener { private JPanel jPanel = new JPanel() //面板jPanel用于容纳模糊、锐化、还原图像按钮 private JButton buttonFile //打开图像文件按钮 private JButton buttonBlur //模糊图像按钮 private JButton buttonSharpen //锐化图像按

This sample show you how behaviour, working with Thread Changing JPanel inside another, this is useful to view the Exception of type java.lang.IllegalStateException.