class Gui_Started is public, should be declared in a file named Gui_Started.java public class Gui_Started extends JFrame{

Asked Jul 11 '17 at 14:26

Active Jul 11 '17 at 14:34

Viewed 102 times

i try to make project with notepad and debug it with cmd and I got an error for class Gui_Started is public, should be declared in a file named Gui_Started.java public class Gui_Started extends JFrame{

import javax.swing.JFrame;

public class Gui_Started extends JFrame{
    public static void main(String[] args) {

        Gui_Started gui = new Gui_Started();
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gui.setSize(500,500);
        gui.setVisible(true);
        gui.setTitle("Gui Pertama");

    }
}

edited Jul 11 '17 at 14:34

Blasanka

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asked Jul 11 '17 at 14:26

user8322851

So separate this code into another java file named, Gui_Started.java – Blasanka Jul 11 '17 at 14:35
a JavaFX application class must extend javafx.application.Application – user8322851 Jul 11 '17 at 14:39
I can see this is swing not javafx – Blasanka Jul 11 '17 at 14:41
watch this: https://www.youtube.com/watch?v=CVldNE9UVPs – Blasanka Jul 11 '17 at 14:43
If you do not override methods in `JFrame`, you do not need to `extends JFrame`, simply create composition(`JFrame frame = new JFrame("title")`. read this also https://stackoverflow.com/questions/15867148/why-do-we-need-to-extend-jframe-in-a-swing-application – Blasanka Jul 11 '17 at 14:44
watch this: youtube.com/watch?v=CVldNE9UVPs thank you, it works now – user8322851 Jul 11 '17 at 14:48
yes i do not need to extends, thank you – user8322851 Jul 11 '17 at 14:49
Does this answer your question? [Error: class X is public should be declared in a file named X.java](https://stackoverflow.com/questions/13811020/error-class-x-is-public-should-be-declared-in-a-file-named-x-java) – starball Apr 23 '23 at 22:57

class Gui_Started is public, should be declared in a file named Gui_Started.java public class Gui_Started extends JFrame{

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