Java GUI with JFrames

Question

Today I started learning Java GUI and tried to create a simple window on my Ubuntu. I am using jre7 for now. I wrote code exactly from tutorial because from experience there are stuff that doesn't work even if it's correctly typed onto my screen. So, now I used thenewboston's first tutorial with Java GUI. Typed all syntax correctly, classes seems fine, no errors. He got window that was expected - mine only got blank window with no title and no text.

Screenshot with that
_{(source: scaleengine.net)}

Code in JFrames.java file:

import java.awt.FlowLayout; // importē plūstošo skatu / default layout
import javax.swing.JFrame; // dod iespēju piekļūt pamata logu struktūrai
import javax.swing.JLabel; // ļauj rakstīt tekstu logos

public class JFrames extends JFrame {

    private JLabel item1;
    
    public JFrames() {
        super("The Title Of The Program"); // parāda title bar ar tekstu
        setLayout(new FlowLayout());
        
        item1 = new JLabel("This is sentence with something");
        item1.setToolTipText("This is tooltip on hover");
        add(item1); // pievieno logam šo lietiņu
    }
}

Please, ignore latvian comments, that's just for my reference. So I want to know - why my window appears blank?

Answer 1

In the screenshot, your code says:

JFrame frame = new JFrame();

That should be JFrames with an s.

JFrames frame = new JFrames();