Reputation: 49
I am having trouble with running Java Applet on site. Applet itself runs localy ok from jar file and there are no errors or warning when compiling it. I even succeselfully signed it, but when I try to run it from website I always get java.lang.reflect.InvocationTargetExpection . Any ideas what I am doing wrong? Heres the applet source code:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import java.io.*;
public class test {
private static void createAndShowGUI() {
JFrame frame1 = new JFrame("JAVA");
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton button = new JButton(" Remote Desktop <<");
//Add action listener to button
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
try {
Process p = Runtime.getRuntime().exec("C:\\Windows\\System32\\mstsc.exe"); //calls cmd.exe and prints hello world to console
BufferedReader in = new BufferedReader(
new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
System.out.println(line);
}
} catch (IOException l) {
l.printStackTrace();
}
}
});
frame1.getContentPane().add(button);
frame1.pack();
frame1.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
And here output from jave console:
java.lang.UnsupportedClassVersionError: button : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.UnsupportedClassVersionError: button : Unsupported major.minor version 51.0
Upvotes: 1
Views: 210
Reputation: 18562
Applett
or JApplet
.Upvotes: 1