I need to launch a JFrame from another JFrame and have that run like independent applications, help?
You might be able to adapt this Swing based Launcher that uses
ProcessBuilder
to run programs in a separate JVM.
package gui;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
/**
* @see http://stackoverflow.com/a/5696404/230513
*/
public class Launcher extends JPanel implements Runnable {
private final JLabel label = new JLabel();
private final JButton launch = new JButton();
ProcessBuilder pb = new ProcessBuilder(
"java", "-cp", "build/classes", "gui.Launcher$DialogTest");
private volatile Process proc;
public static void main(String[] args) {
EventQueue.invokeLater(new Launcher()::createGUI);
}
private void createGUI() {
final JFrame frame = new JFrame();
frame.setLayout(new GridLayout(0, 1));
frame.add(new Launcher());
frame.add(new Launcher());
frame.add(new Launcher());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public Launcher() {
this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
this.setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
launch.setAlignmentX(0.5f);
label.setAlignmentX(0.5f);
launch.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (proc == null) {
launch.setText("Terminate");
label.setText("Status: run");
new Thread(Launcher.this).start();
} else {
proc.destroy();
reset();
}
}
});
this.add(launch);
this.add(label);
reset();
}
@Override
public void run() {
try {
proc = pb.start();
proc.waitFor();
} catch (IOException | InterruptedException ex) {
ex.printStackTrace(System.err);
}
EventQueue.invokeLater(this::reset);
}
private void reset() {
proc = null;
launch.setText("Launch");
label.setText("Status: idle");
}
private static class DialogTest {
public static void main(String[] args) {
EventQueue.invokeLater(() -> {
JOptionPane.showMessageDialog(null, "Running",
"Test", JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
});
}
}
}
Updated to Java 8 at the author's request.