public class MainForm extends JFrame{
     
     LeftPane lp;
     RightPane rp;
     JSplitPane sp;
     TopPanel tp;
     BottomPanel bp;
      
    public MainForm() throws HeadlessException {
         
        super("meta-nalog-365");
        lp = new LeftPane();
        rp = new RightPane();
        sp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, lp, rp );
        tp = new TopPanel();
        bp = new BottomPanel();
         
         
        sp.setPreferredSize(new Dimension(200, 600));
        tp.setPreferredSize(new Dimension(800, 100));
        bp.setPreferredSize(new Dimension(800,50));
         
        setLayout(new BorderLayout());
         
        add(BorderLayout.NORTH, tp);
        add(BorderLayout.CENTER,sp);
        add(BorderLayout.SOUTH, bp);
         
        setSize(800, 800);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);   
    }

package test_swing;
 
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
 
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
 
public class RightPane extends JPanel{
     
    UpForm upf;
    JSplitPane sp;
    DownForm df;
     
    public RightPane() {
         
        upf = new UpForm();
         
        upf.setPreferredSize(new Dimension(1200,400));
         
        df = new DownForm();
         
        df.setPreferredSize(new Dimension(1200,400));
         
        setLayout(new GridBagLayout());
         
        GridBagConstraints gc = new GridBagConstraints();
         
         sp = new JSplitPane(JSplitPane.VERTICAL_SPLIT,upf, df);
 
         gc.gridx = 0;
             
         gc.gridy = 0;
              
         add(sp, gc);
         
    }
 
}

gc.gridx = 0;
    gc.gridy = 1;
    gc.fill = GridBagConstraints.NONE;
    gc.anchor = GridBagConstraints.FIRST_LINE_START;
    gc.insets = new Insets(0,10,0,0);
    add(add, gc);
     
    gc.gridx = 1;
    gc.gridy = 1;
    gc.fill = GridBagConstraints.NONE;
    gc.insets = new Insets(0,-950,0,0);
    gc.anchor = GridBagConstraints.FIRST_LINE_START;
    add(open, gc);

	public MainForm() throws HeadlessException {
		
		super("meta-nalog-365");
		lp = new LeftPane();
	
		upf = new UpForm();
		df = new DownForm();
		
		tp = new TopPanel();
		bp = new BottomPanel();
		
		spl = new JSplitPane(JSplitPane.VERTICAL_SPLIT, upf, df);
		sp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, lp, spl );