How to resize a JPanel to fit a JFrame in "docknorth" with no interference to remaining JPanels

I am doing a little test of a demo Swing GUI. In this demo, the JFrame is composed of 3 "master" JPanels. If you will, the first (jp1) is composed of JLabels, and the other two are composed of several other JPanels. I am using MigLayout.

Here is my sample code:

    // All the jPanels  
    JFrame frame = new JFrame();
    frame.setLayout(new MigLayout());
    JPanel jp1 = new JPanel();
    jp1.setLayout(new MigLayout());
    jp1.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
    JPanel jp2 = new JPanel();
    jp2.setLayout(new MigLayout());
    jp2.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
    JPanel jp3 = new JPanel();
    jp3.setLayout(new MigLayout());
    jp3.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
    JPanel jp4 = new JPanel();
    jp4.setLayout(new MigLayout());
    jp4.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
    JPanel jp5 = new JPanel();
    jp5.setLayout(new MigLayout());
    jp5.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
    JPanel jp6 = new JPanel();
    jp6.setLayout(new MigLayout());
    jp6.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
    JPanel jp7 = new JPanel();
    jp7.setLayout(new MigLayout());
    jp7.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));

    JPanel bigPanel1 = new JPanel();
    bigPanel1.setLayout(new MigLayout());
    bigPanel1.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));

    JPanel bigPanel2 = new JPanel();
    bigPanel2.setLayout(new MigLayout());
    bigPanel2.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
    //All the labels to be added to JPanel jp1
    JLabel label1 = new JLabel();
    label1.setText("LABEL1");
    JLabel label2 = new JLabel();
    label2.setText("LABEL2");
    JLabel label3 = new JLabel();
    label3.setText("LABEL3");
    JLabel label4 = new JLabel();
    label4.setText("LABEL4");
    jp1.add(label1);
    jp1.add(label2);
    jp1.add(label3);
    jp1.add(label4,"wrap");
    bigPanel1.add(jp2);
    bigPanel1.add(jp6);
    bigPanel1.add(jp3,"grow,wrap");
    bigPanel2.add(jp4);
    bigPanel2.add(jp7);
    bigPanel2.add(jp5,"grow,wrap");
    frame.getContentPane().add(jp1,"dock north, wrap");
    frame.getContentPane().add(bigPanel1,"span,grow,wrap");
    frame.getContentPane().add(bigPanel2,"span,grow,wrap");
    frame.pack();
    frame.setVisible(true);

Which results in this output:GUI OUTPUT

What I want to achieve is being able to add labels into the 1st JPanel (jp1) without messing with the remainder JPanels width. Additionally, I want to make the several JPanels inside a bigPanel to occupy its full width, as well as in jp2,jp6 and jp3 to fill bigPanel1.

How should I do this? Thanks in advance.

I have never used MigLayout, and personally dont see the reason if it can be done using default java LayoutManager.

Okay so I used a combination FlowLayout and GridBagLayout to achieve this, along with gc.fill=GridBagConstraints.NONE and gc.anchor=GridBagConstraints.WEST for those panels which we dont want to fill the contentpane width, also updated as per your comment to stop the JPanel/JFrame from growing larger than the given max width when more JLabels are added this was done using a JScrollPane:

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.border.LineBorder;

public class Test {

    public Test() {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.setLayout(new GridBagLayout());

        final JPanel labelPanel = new JPanel();
        labelPanel.setBorder(new LineBorder(Color.black));
        for (int i = 0; i < 5; i++) {
            labelPanel.add(new JLabel("Label" + (i + 1)));
        }

        final int maxWidth = 200;
        final JScrollPane jsp = new JScrollPane(labelPanel) {
            @Override
            public Dimension getPreferredSize() {
                //we set the height by checking if we exceeed the wanted ith thus a scrollbar will appear an we must incoprate that or labels wont be shpwn nicely
                return new Dimension(maxWidth, labelPanel.getPreferredSize().width < maxWidth ? (labelPanel.getPreferredSize().height + 5) : ((labelPanel.getPreferredSize().height + getHorizontalScrollBar().getPreferredSize().height) + 5));
            }
        };

        JPanel otherPanel = new JPanel();
        otherPanel.add(new JLabel("label"));
        otherPanel.setBorder(new LineBorder(Color.black));

        JPanel otherPanel2 = new JPanel();
        otherPanel2.add(new JLabel("label 1"));
        otherPanel2.add(new JLabel("label 2"));
        otherPanel2.setBorder(new LineBorder(Color.black));

        GridBagConstraints gc = new GridBagConstraints();

        gc.fill = GridBagConstraints.BOTH;
        gc.weightx = 1.0;
        gc.weighty = 1.0;
        gc.gridx = 0;
        gc.gridy = 0;
        frame.add(jsp, gc);

        gc.fill = GridBagConstraints.NONE;
        gc.anchor = GridBagConstraints.WEST;
        gc.gridy = 1;
        frame.add(otherPanel, gc);
        gc.anchor = GridBagConstraints.WEST;
        gc.gridy = 2;
        frame.add(otherPanel2, gc);

        frame.pack();
        frame.setVisible(true);
        frame.revalidate();
        frame.repaint();
    }

    public static void main(String[] args) {
        //Create Swing components on EDT
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new Test();
            }
        });
    }
}