Search panel not showing

java_lab.java

import javax.swing.*;
import java.awt.*;


public class SNIDGUI {

    public static void main(String args[]) {
        JFrame frame = new JFrame("SYSTEM FOR NATIONAL INDENTIFICATION (SNID)");
        frame.setSize(600, 800);
        frame.setBackground(Color.WHITE);
        
        JPanel first = new JPanel();
        first.setBackground(Color.WHITE);
        
        ButtonGroup bGroup = new ButtonGroup();
        JRadioButton id = new JRadioButton("Search by id", false);
        JRadioButton name = new JRadioButton("Seach by Name", false);
        JRadioButton biosearch = new JRadioButton("Biometric Search", false);

        id.setBackground(Color.WHITE);
        name.setBackground(Color.WHITE);
        biosearch.setBackground(Color.WHITE);

        bGroup.add(id);
        bGroup.add(name);
        bGroup.add(biosearch);
        

        first.add(id); 
        first.add(name);
        first.add(biosearch);
        frame.add(first, BorderLayout.NORTH);

        JPanel second = new JPanel();
        second.setBackground(Color.WHITE);

        BoxLayout boxlayout = new BoxLayout(second, BoxLayout.Y_AXIS);
        second.setLayout(boxlayout);

        JButton searchButton = new JButton(" Search");
        JButton clearButton = new JButton("  Clear  ");
        JButton quitButton = new JButton("   Quit   ");

        second.add(Box.createRigidArea(new Dimension(10, 25)));
        second.add(searchButton);
        second.add(Box.createRigidArea(new Dimension(10, 10))); 
        second.add(clearButton);
        second.add(Box.createRigidArea(new Dimension(10, 10)));
        second.add(quitButton);
        frame.add(second, BorderLayout.EAST);

        JPanel third = new JPanel();
        third.setBackground(Color.WHITE);

        JTextField userent = new JTextField("     User enters search string here     ");

        third.add(userent);
        frame.add(third);

        JPanel fourth = new JPanel();
        fourth.setBackground(Color.WHITE);

        JTextArea idRecs = new JTextArea("\n \n     Id of located \n      records are \n    displayed here. \n    User can select  \n         one for \n         detailed \n         display \n \n");
        JTextArea dets = new JTextArea("\n \n \n \n \nDetails of a selected record are displayed here \n \n \n \n \n");
        
        fourth.add(idRecs);
        fourth.add(dets);
        frame.add(fourth);
    
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

    }
}