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    <p>You might be able to adapt this Swing based <a href="http://groups.google.com/group/comp.lang.java.programmer/msg/c81f8c5f269e22e5" rel="nofollow noreferrer">Launcher</a> that uses <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ProcessBuilder.html" rel="nofollow noreferrer"><code>ProcessBuilder</code></a> to run programs in a separate JVM.</p> <p><a href="https://i.stack.imgur.com/iufvi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iufvi.png" alt="image"></a></p> <pre><code>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(() -&gt; { JOptionPane.showMessageDialog(null, "Running", "Test", JOptionPane.INFORMATION_MESSAGE); System.exit(0); }); } } } </code></pre> <p><sup><em>Updated to Java 8 at the author's request.</em></sup></p>
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    1. POI need to launch a JFrame from another JFrame and have that run like independent applications, help?
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    1. COWhy do you mention (the IMO abominable) `exec()` when your example at comp.lang.java.programmer uses (the 'ominable') `ProcessBuilder`?
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      1. USAndrew Thompson
    2. CO@Andrew Thompson: I am [yeti](http://en.wikipedia.org/wiki/Yeti) again in your debt. :-) Updated.
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    3. COExcellent. Loved the 'yeti' reference, BTW. :-)
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