CODEWITHSUNDEEP
java
Peter-Andre
Peter-Andre

Reputation: 33

"The type javax.swing.JFrame is not accessible" What does this mean and how do I fix it?

I'm following along with this tutorial, and I got a problem early in the video (at approximately 7:45). I'm trying to create a basic Java program that will launch a window, however, I can't seem to import JFrame.

I've looked for other solutions on Stack Overflow, but I haven't found one that works for me.

Here is the code I've written:

import javax.swing.JFrame;

public class App {

    public static void main(String[] args) {

        JFrame frame = new JFrame("Hello World");

        frame.setVisible(true);

    }

}

I'm using Eclipse version 4.12.0 on a Macbook Pro (13-inch, Mid 2012) running macOS Mojave version 10.14.5

Expected result: A window opens when I run the program, and when I close the window, the program ends.

Actual result: No window is created and I get this error message: 

Error occurred during initialization of boot layer
java.lang.module.FindException: Error reading module: /Users/username/eclipse-workspace/Swing1/bin
Caused by: java.lang.module.InvalidModuleDescriptorException: App.class found in top-level directory (unnamed package not allowed in module)

Upvotes: 1

Views: 11957

Answers (4)

Sabeshini
Sabeshini

Reputation: 1

Try adding different version of jdk. Right click on packages and go to Properties then, go to Java Build Path. Select Libraries and then below select Module Package and click Add Library, then select JRE system library and then go on to the Execution environment and click different are model. Then click finish and apply. This worked for some as far as I have heard.

Upvotes: 0

TheWaterWave222
TheWaterWave222

Reputation: 129

If you have a module-info.java file, put this in the module:

requires java.desktop;

Upvotes: 3

Mojtaba Mohammadi
Mojtaba Mohammadi

Reputation: 11

I had the same issue. I did similar code in Eclipse. I got the error The type javax.swing.JFrame is not accessible on the side of import javax.swing.JFrame; The solution is: Delete the line of import javax.swing.JFrame; And then, inside your body of your code inside your main, with your mouse, hover over JFrame keyword, and Eclipse will offer some auto-completion suggestion. Select import 'JFrame' (javax.swing) This will bring the required import automatically. It is a kind of shortcut. In order to avoid these type of errors: Never type manually, get the imports AND methods, for example setVisible by autofilling. For instance, type frame.setV and again Eclipse will suggest the completion ... select from there. I do not know why, but this is what happened in my case.

Upvotes: 0

vincenzopalazzo
vincenzopalazzo

Reputation: 1645

If you have created the java app with eclipse your fault is the package.

With eclipse, I created a java app and this is the result

enter image description here

This code fixed your foult

package demo;

import java.awt.Dimension;

import javax.swing.JFrame;

public class App {

    public static void main(String[] args) {

        JFrame frame = new JFrame("Hello World");

        frame.setLocationRelativeTo(null);
        frame.setSize(new Dimension(400, 400));
        frame.setVisible(true);

    }

}

The reference for understand the package

Upvotes: 1

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