Java™ After Hours: 10 Projects You'll Never Do at Work

Handling Menu Selections

The actionPerformed method handles menu selections, setting the appropriate drawing flags as needed. This method handles the File menu's Open item by using the ImageIO class to open an image file:

public void actionPerformed(ActionEvent e)
{
    if(e.getSource() == openMenuItem){
        try{
					dialog.setMode(FileDialog.LOAD);
					dialog.setVisible(true);
					if(dialog.getFile() != ""){
					File inputFile = new File(dialog.getDirectory() +
					dialog.getFile());
					bufferedImage = ImageIO.read(inputFile);
					if(bufferedImage != null){
					image = createImage(bufferedImage.getWidth(),
					bufferedImage.getHeight());
					Graphics2D g2d = (Graphics2D)
					image.getGraphics();
					g2d.drawImage(bufferedImage, null, 0, 0);
					imageWidth = bufferedImage.getWidth();
					imageHeight = bufferedImage.getHeight(); ...