Swing Label Demo
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import java.awt.GridLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/*
* SwingLabelDemo.java is a 1.4 application that needs one other file:
* images/middle.gif
*/
public class SwingLabelDemo extends JPanel {
public SwingLabelDemo() {
super(new GridLayout(3,1)); //3 rows, 1 column
JLabel label1, label2, label3;
ImageIcon icon = createImageIcon("images/middle.gif",
"a pretty but meaningless splat");
//Create the first label.
label1 = new JLabel("Image and Text",
icon,
JLabel.CENTER);
//Set the position of its text, relative to its icon:
label1.setVerticalTextPosition(JLabel.BOTTOM);
label1.setHorizontalTextPosition(JLabel.CENTER);
//Create the other labels.
label2 = new JLabel("Text-Only Label");
label3 = new JLabel(icon);
//Create tool tips, for the heck of it.
label1.setToolTipText("A label containing both image and text");
label2.setToolTipText("A label containing only text");
label3.setToolTipText("A label containing only an image");
//Add the labels.
add(label1);
add(label2);
add(label3);
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path,
String description) {
java.net.URL imgURL = SwingLabelDemo.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("SwingLabelDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
SwingLabelDemo newContentPane = new SwingLabelDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
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