Question

I have a frame with a var , I added that var to a JPanel, and if I want to add the same var to another JPanel, it`s disappearing from the first JPanel. I want a logical explanation for my problem please, thank you !
I want to store my JLabel in both of my jpanels.

public class Gui {
    JPanel panel1, panel2;
    JLabel text = new JLabel("some text");
    JFrame frame = new JFrame();

    public Gui {
        panel1 = new JPanel();
        panel1.setLayout(null);
        panel1.add(text);
        panel1.getComponent(0).setBounds(50,50,50,50);
        panel1.setBorder(BorderFactory.createLineBorder(Color.black));
        panel1.setBounds(x,y,w,h);
        // it`s working, the labels it`s visible

        panel2 = new JPanel();
        panel2.setLayout(null);
        panel2.add(text);
        panel2.getComponent(0).setBounds(100,100,50,50);
        panel2.setBorder(BorderFactory.createLineBorder(Color.black));
        panel2.setBounds(x,y,w,h);
        //it`s not working, the label ins`t visible ...

        frame.add(panel1);
        frame.add(panel2);
    }
}

Answer 1

Disclaimer: I am editing my answer in response to comments from the OP. However, I am still not entirely sure about some of the details of the question. I will gladly edit my answer as more clarifications are given.

Answer: One possible solution is to create subclasses of the Swing components you are using. For example,

public class MyPanel extends JPanel {
  private JLabel label = new JLabel("some text");

  public MyPanel() {
    this.add(label);
  }
}

Now you can create multiple instances of MyPanel which each have its own JLabel. Then you can add these panels to your frame.

Added: With the additional information given in the comments, I would go a step further and create a custom JFrame class:

public class MyFrame extends JFrame {
  private MyPanel panel = new MyPanel();

  public MyFrame() {
    this.add(panel);
  }
}

Now you can create several instances of MyFrame. If you want to go even further, you can add parameters to the constructors of both of these custom classes to set the JLabel text to different values in each instance MyFrame. I will leave the details as an exercise to the reader. (Of course, please ask if you get stuck, though.)