adding multiple small panels to a frame

Question

i am trying to make a simple interface in java,but i have a problem with adding multiple panels into a frame.I want it to be a cafe software so there will be multiple tables.Here is my code

public class CafeView extends JFrame{

private JButton takeMoneyBtn = new JButton("Hesabı Al");

public CafeView(){
    JPanel table1 = new JPanel();
    this.setSize(800,600);
    this.setLocation(600, 200);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.setVisible(true);

    table1.setBounds(100, 100, 150, 150);
    table1.setLayout(null);
    this.add(table1);
    table1.add(takeMoneyBtn);

}
}

When i run it, i just see an empty frame.In this code i just tried to add one simple panel,if i can do it i can add others too i think.So how can i solve it and add small and many panels into a frame,what am i missing? Thank you for your help.(There isn't a main method cause i call this interface class from another class.)

Answer 1

You're arranging the position of your component which is in this case JPanel using .setBounds(..,..) , You should instead use it to the top level container (JFrame, JWindow, JDialog, or JApplet.) not to JPanel. So remove :

table1.setBounds(100, 100, 150, 150);

We are provided by LayoutManager to arrange components, see LayoutManager

   public class CafeView extends JFrame{

private JButton takeMoneyBtn = new JButton("Hesabı Al");

public CafeView(){
    JPanel table1 = new JPanel();
    this.setSize(800,600);
    this.setLocation(600, 200);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.setVisible(true);

   //table1.setBounds(100, 100, 150, 150);
    //table1.setLayout(null);
    this.add(table1,BorderLayout.CENTER);
    table1.add(takeMoneyBtn);

}