SwingGadget2.java

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package jpl.util;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;

public class SwingGadget2 extends JFrame
        {
        private static final long       serialVersionUID        = 1L;
        private Qev head;
        private Qev tail;
        public JPanel pane;

        public ActionListener al = 
                new ActionListener()
                        {
                        public void actionPerformed(ActionEvent e)
                                {
                                inc(e);
                                }
                        };

        public SwingGadget2(String caption)
                {
                super(caption);         // call the JFrame contructor
                try     {
                        UIManager.setLookAndFeel(
                                UIManager.getSystemLookAndFeelClassName()
                        );
                        }
                catch (Exception e)
                        {
                        }
                pane = new JPanel();
                getContentPane().add(pane, BorderLayout.CENTER);

             // JButton button1 = new JButton("click me");
             // JButton button2 = new JButton("...or me");

             // button1.addActionListener( al);
             // button2.addActionListener( al);

             // pane.add(button1);
             // pane.add(button2);

                pack();
                setVisible(true);
                }

        public synchronized void inc(Object e)
                {
                if ( head == null )
                        {
                        head = new Qev(e);
                        head.next = null;
                        tail = head;
                        }
                else
                        {
                        tail.next = new Qev(e);
                        tail = tail.next;
                        }
                notifyAll();
                }

        public synchronized Object dec()
                {
                Qev t;

                try     {
                        while ( head == null )
                                {
                                wait();
                                }
                        t = head;
                        head = head.next;
                        return t.ev;
                        }
                catch ( InterruptedException e )
                        {
                        return null;
                        }
                }

        public class Qev
                {
                public Object ev;
                public Qev next;

                public Qev(Object e)
                        {
                        ev = e;
                        }
                }
        }

---

jpl
Author(s): Lorenz Moesenlechner
autogenerated on Fri Jan 11 09:40:29 2013