JAVA子窗口關閉時不會整個程式關掉

public class NewJFrame2 extends javax.swing.JFrame {
    String path ="1";


    @Override
    public void setDefaultCloseOperation(int i) {
        super.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); //To change body of generated methods, choose Tools | Templates.
    }

要這樣寫 才能夠子窗口關閉時不會整個關掉
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)就OK了。
http://blog.csdn.net/qqliang1314/article/details/6990354

不要用JPEGImageEncoder無法F11

不要用JPEGImageEncoder 而是使用ImageIO.write(bi, "png", outputfile); 來替代!!否則無法F11

try {

    // retrieve image
    BufferedImage bi = getMyImage();
    File outputfile = new File("saved.png");
    ImageIO.write(bi, "png", outputfile);
} catch (IOException e) {
    ...
}

The ImageI
http://docs.oracle.com/javase/tutorial/2d/images/saveimage.html