<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"> <title></title> </head> <body text="#000000" bgcolor="#ffffff"> Dear Colleagues, I'm a bloody java beginner and got an installation/configuration problem. I downloaded and installed sun's jdk1.5.0_06 to my FC3 box in /usr/share/jdk1.5.0_06/. I fiddled around with the symlinks to point to the binaries in .../bin/ and javac etc. now run. However, I get a java.lang.ClassCastException: SwingUI at sun.applet.AppletPanel.createApplet(AppletPanel.java:721) at sun.applet.AppletPanel.runLoader(AppletPanel.java:650) at sun.applet.AppletPanel.run(AppletPanel.java:324) at java.lang.Thread.run(Thread.java:595) when I try to view the class built from the simple code at the end of this message with appletviewer (all of the code there for completeness). I do think java doesn't find javax.* - and don't know how to tell it where it is. I've set my JAVA_HOME=/usr/share/jdk1.5.0_06/ (that's where my installation is). Any idea what is going wrong here? (I posted a similar question to the parallel sun-list, but got no solution from there...) THX, Peter Code: import java.awt.Color; import java.awt.BorderLayout; import java.awt.event.*; import javax.swing.*; public class SwingUI extends JFrame implements ActionListener { JLabel text, clicked; JButton button, clickButton; JPanel panel; private boolean _clickMeMode = true; public void init() { System.out.println("starting..."); } public SwingUI(){ //Begin Constructor text = new JLabel("I'm a Simple Program"); button = new JButton("Click Me"); button.addActionListener(this); panel = new JPanel(); panel.setLayout(new BorderLayout()); panel.setBackground(Color.white); getContentPane().add(panel); panel.add(BorderLayout.CENTER, text); panel.add(BorderLayout.SOUTH, button); } //End Constructor public void actionPerformed(ActionEvent event){ Object source = event.getSource(); if (_clickMeMode) { text.setText("Button Clicked"); button.setText("Click Again"); _clickMeMode = false; } else { text.setText("I'm a Simple Program"); button.setText("Click Me"); _clickMeMode = true; } } public static void main(String[] args){ SwingUI frame = new SwingUI(); frame.setTitle("Example"); _clickMeMode = false; } else { text.setText("I'm a Simple Program"); button.setText("Click Me"); _clickMeMode = true; } } public static void main(String[] args){ SwingUI frame = new SwingUI(); frame.setTitle("Example"); WindowListener l = new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }; frame.addWindowListener(l); frame.pack(); frame.setVisible(true); } } <pre class="moz-signature" cols="72">-- <a class="moz-txt-link-freetext" href="http://www.peter-kuehnlein.net">http://www.peter-kuehnlein.net</a> "The Way of the Samurai is in desperateness. Ten men or more cannot kill such a man." (Hagakure) Upcoming event: <a class="moz-txt-link-freetext" href="http://www.constraints-in-discourse.org/cid06">http://www.constraints-in-discourse.org/cid06</a> </pre> </body> </html>