Add a panel on another panel

Question

I am working on a program and need to put one panel into another panel . I have been successful at adding the panel
however when i do this i cannot set the size of the 2nd panel. The first panel on the frame is just fine
i have tried adding the panel to the first panels constructor this works the panel shows up but i am unable
to set the size of the panel which is the problem.
I tried calling this.setSize in the second panels constructor to solve this problem no luck there
i have also tried adding the 2nd panel to the frame but this produces the same problem as stated above
im really stumped any help woul be appreciated
here is some code i have
This is the frames class with the first panel added
public ICUFrame () {
        super("ICU");
        canvas= new ICUPanel();
        add(canvas, BorderLayout.CENTER);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(1000,1000);
        setVisible(true);
    } this is the panel on the frame
only the constructor is required here as the rest is just code for drawing etc...
public class ICUPanel extends JPanel {
    DiaDisplay d ;
    SysDisplay s;
    public ICUPanel(){
        super();
        setBackground(Color.BLACK);
        ICUMonitoring monitor = new ICUMonitoring();
        Thread rep = new Thread(new Repainter());
        d = new DiaDisplay(220,20,40,200);
        s = new SysDisplay(420,220,40,200);
        rep.start();
    }// end of constructor
}this is the 2nd panel i am trying to add to the 1st panel
public class ECGPanel extends JPanel {
    ecgDisplay e;
     public ECGPanel(){
     super();
     setBackground(Color.white);
     e = new ecgDisplay();
    }// end of constructor
}

Answer 1

xiaolixx wrote:
I am working on a program and need to put one panel into another panel . I have been successful at adding the panel
however when i do this i cannot set the size of the 2nd panel. The first panel on the frame is just fine
i have tried.. What happened to your shift key? Please apply it once at the start of every sentence, rather than those rare occasions you 'feel like it'. Adding an upper case letter to each sentence makes it easier for people to quickly scan the text, looking for ways to help. You would not want to make it harder for someone to help, would you?
..adding the panel to the first panels constructor this works the panel shows up but i am unable
to set the size of the panel which is the problem.
I tried calling this.setSize in the second panels constructor to solve this problem no luck there
i have also tried adding the 2nd panel to the frame but this produces the same problem as stated above
im really stumped any help woul be appreciated
here is some code i haveAlso known as 'uncompilable code snippets'. For better help sooner, post an SSCCE . But first, go through the tutorial to which Darryl linked.