Error while trying to run a class

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4

This is my first post here on the stack, I’m having a hard time running this class in Netbeans. I’m using version 1.8.0_40 of Java, I’ve tried searching for some solution, but I can’t find.

public class Dialog1 {

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        // TODO code application logic here
        JOptionPane.showMessageDialog(null, "Bem Vindo ao Java");
    }

}

when compiling this class it even gives as a success, but gives an error message

run: Error: Unable to locate or load main class dialog1.Dialog1 Java Result: 1 BUILT SUCCESSFULLY (total time: 1 according to)

Does anyone know what might be going on?

java netbeans

  • This error seems to be related to project configuration, if you created a Java project, see in the properties if it is set correctly to correct jre for execution.

  • 1

    I suggest trying to run the script from the command line. If you have no problems from the command line, it is something in the IDE itself.

2 answers

2

It may be that import is missing at the beginning of the file:

import javax.swing.JOptionPane;

0

Missing the import of the class JOptionPane. As already said by Victor, you can import it with import javax.swing.JOptionPane; at the beginning of the code. But since in this case you’re only using her once, you could do so:

javax.swing.JOptionPane.showMessageDialog(null, "Bem vindo ao java!");

In this case, you are "calling" the class to be used only on that line. If you need it again, you will need to repeat this command.

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