First Applet

Question

Hello
I just started a Java programming class and this is my first post
I tried running this Applet from our book but get the error "java.lang.NoSuchMethodError:
main Exception in thread "main".
// Fig. 3.9: WelcomeApplet2.java
// Displaying multiple strings in an applet.
// Java packages
import java.awt.Graphics; // import class Graphics
import javax.swing.JApplet; // import class JApplet
public class WelcomeApplet2 extends JApplet {
// draw text on applet�s background
public void paint( Graphics g )
// call superclass version of method paint
super.paint( g );
// draw two Strings at different locations
g.drawString( "Welcome to", 25, 25 );
g.drawString( "Java Programming!", 25, 40 );
} // end method paint
} // end class WelcomeApplet2
The book talks about needing an applet viewer which it has in the book cd. I didn't wish
to install the sdk from the book as it wants to unload the version already installed. So my
programs may uninstall with it. But nonetheless the error persists.
Any ideas?
Steve Brock

Answer 1

Hi
I'm not 100% sure whether that what you wanted but anyway ill show it to you :)
// Fig. 3.9: WelcomeApplet2.java
// Displaying multiple strings in an applet.
// Java packages
import java.awt.Graphics; // import class Graphics
import javax.swing.JApplet; // import class JApplet
import javax.swing.*;
import java.awt.*;
public class WelcomeApplet2 extends JApplet
JFrame frame = new JFrame(); //creating a Frame so you can use paint()
// to learn more about this go to java tutorials Swing
public void createFrame()
JFrame.setDefaultLookAndFeelDecorated(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setupFrame(frame.getContentPane());
frame.pack();
frame.setSize(100,100);
frame.setVisible(true);
public void setupFrame(Container pane)
pane.add(new Panel());
public class Panel extends JPanel
// draw text on appletys background
public void paint( Graphics g )
// call superclass version of method paint
// super.paint( g );
// draw two Strings at different locations
g.drawString( "Welcome to", 25, 25 );
g.drawString( "Java Programming!", 25, 40 );
public static void main(String[] args) // always in java code
WelcomeApplet2 newObj = new WelcomeApplet2(); //creating an instance of this class
newObj.createFrame();
ok this code will work... and yours wasn't because you have to have main method, because after you have compiled your code, JVM searches class for this method to execute the program.