[Løst] Could not find the main class: ShowBorderLayout. Program will exit. Hjelp!

[snozzlee]

Her er et enkelt eksempel fra læreboka som jeg skrev inn i Eclipse for å se hvordan det funker, men det fungerer ikke.

 

import javax.swing.*;

 

public class MyFrameWithComponents {

public static void main(String[] args) {

JFrame frame = new JFrame("MyFrameWithComponents");

 

//add a button into the frame

JButton jbtOK = new JButton("OK");

frame.add(jbtOK);

 

frame.setSize(400,300);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setLocationRelativeTo(null); //center the frame

frame.setVisible(true);

}

}

 

java.lang.NoClassDefFoundError: ShowBorderLayout

Caused by: java.lang.ClassNotFoundException: ShowBorderLayout

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

Exception in thread "main"

 

Description Resource Path Location Type

Jbutton cannot be resolved to a type MyFrameWithComponents.java /MyFrameWithComponents/src line 8 Java Problem

Jbutton cannot be resolved to a type MyFrameWithComponents.java /MyFrameWithComponents/src line 8 Java Problem

Jbutton cannot be resolved to a type ShowBorderLayout.java /new/src line 8 Java Problem

Jbutton cannot be resolved to a type ShowBorderLayout.java /new/src line 8 Java Problem

The public type ShowBorderLayout must be defined in its own file MyFrameWithComponents.java /MyFrameWithComponents/src line 3 Java Problem

 

Hva er problemet her? Alle andre eksempler fra boka har funket som de skulle hittil, bortsett fra frames

[snozzlee]

Noen pekte ut feilen

[miXer]

Kan være greit å legge ut svaret slik at andre som havner i samme klemma kan finne denne tråden.