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Swing (Java) 288
Examples
A basic example
The following is a rather simple Swing-based program. It displays a window (a JFrame) containing a label and a
button.
Notice how all instantiation and handling of all Swing components are done on the Event Dispatch Thread by use of
the method EventQueue.invokeLater(Runnable)) and an anonymous Runnable class (see Swing and thread safety).
// Import the swing and AWT classes needed
import java.awt.EventQueue;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
/**
* Basic Swing example.
*/
public class SwingExample {
public static void main(String[] args) {
on the
// Make sure all Swing/AWT instantiations and accesses are done
// Event Dispatch Thread (EDT)
EventQueue.invokeLater(new Runnable() {
@Override
"decorations", i.e.
contained
else the
public void run() {
// Create a JFrame, which is a Window with
// title, border and close-button
JFrame f = new JFrame("Swing Example Window");
// Set a simple Layout Manager that arranges the
// Components
f.setLayout(new FlowLayout());
// Add some Components
f.add(new JLabel("Hello, world!"));
f.add(new JButton("Press me!"));
// "Pack" the window, making it "just big enough".
f.pack();
// Set the default close operation for the window, or