Help needed to display my form,very urgent

Question

i have a Main.java to display my tabs, then a PlayerTab.java which contains all the buttons, Create, Update, Delete and View and a CreatePanel.java which contain the form for adding new members.
The flow is like this when user click on the PlayerTab it will show the 4 buttons.Then when user click on the Create button, i want to show the create panel which contains the form which is inside CreatePanel.java.Then click on other buttons will show other forms. Please teach me how to hide the forms too thanks.
Main.java
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.Graphics;
import java.awt.Toolkit;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
public class Main extends JFrame {
     // Constructor
     public Main(){
          setSize(800,600);
          setTitle("S-League Management System");
          setResizable(false);
          setVisible(true);
          Container frame=getContentPane();
          //centralise the screen
          Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
          Dimension frameSize = frame.getSize();
          frame.setLocation((screenSize.width - frameSize.width) / 2,
               (screenSize.height - frameSize.height) / 2);
          // create new tabbedPane object
          JTabbedPane tabbedPane = new JTabbedPane(){
               ImageIcon imageIcon = new ImageIcon("");
               Image image = imageIcon.getImage();
               public void paintComponent (Graphics g) {
                    g.setColor(new Color(220,220,220));
                    g.fillRect(0,0,800,74);
                    g.drawImage(image, 0, 4, this);
                    super.paintComponent(g);
          //tabbedPane.addTab(" Team Management ", null, new TeamTab());
          tabbedPane.addTab(" Player Registration ",null, new PlayerTab());
          //tabbedPane.setSelectedIndex(1);
          tabbedPane.setBorder(BorderFactory.createEmptyBorder(78,0,0,0));
          frame.add(tabbedPane);
     public static void main(String[] args) {
          Main main = new Main();
          main.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          main.toFront();
          main.show();     
PlayerTab.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class PlayerTab extends JPanel implements ActionListener{
     //JPanel mainPanel = new JPanel();
     JButton createbutton = new JButton("Create");
     JButton updateButton = new JButton("Update");
     JButton deleteButton = new JButton("Delete");
     JButton viewButton = new JButton("View");
     public PlayerTab() {
          this.setLayout(null);
          createbutton.setBounds(new Rectangle(10, 16, 79, 27));
          updateButton.setBounds(new Rectangle(10, 64, 79, 27));
          deleteButton.setBounds(new Rectangle(10, 113, 79, 27));
          viewButton.setBounds(new Rectangle(10, 161, 79, 27));
          this.add(createbutton, null);
          createbutton.addActionListener(this);
          this.add(updateButton, null);
          updateButton.addActionListener(this);
          this.add(deleteButton, null);
          deleteButton.addActionListener(this);
          this.add(viewButton, null);
          viewButton.addActionListener(this);
     public void actionPerformed(ActionEvent e)
          String cmd = e.getActionCommand();     
          if ("Create".equals(cmd))     
               JPanel createPanel = new CreatePanel();
               createPanel.show();
          }//close of if
     }//close of action perform
CreatePanel.java
import java.awt.*;
import javax.swing.*;
public class CreatePanel extends JPanel {
     JPanel createPanel = new JPanel();
     JLabel jLabel1 = new JLabel();
     JLabel jLabel2 = new JLabel();
     JLabel jLabel3 = new JLabel();
     JLabel jLabel4 = new JLabel();
     JLabel jLabel5 = new JLabel();
     JLabel jLabel6 = new JLabel();
     JLabel jLabel7 = new JLabel();
     JLabel jLabel8 = new JLabel();
     JLabel jLabel9 = new JLabel();
     JTextField nricNo = new JTextField();
     JTextField name = new JTextField();
     JRadioButton singleRadio = new JRadioButton();
     JRadioButton marriedRadio = new JRadioButton();
     JRadioButton divorcedRadio = new JRadioButton();
     JComboBox position = new JComboBox();
     JComboBox team = new JComboBox();
     JTextField address = new JTextField();
     JTextField salary = new JTextField();
     JTextField contactNo = new JTextField();
     JTextField dob = new JTextField();
     JButton submitButton = new JButton();
     JButton clearButton = new JButton();
     JButton retrieveButton = new JButton();
     public CreatePanel() {
          createPanel.setBounds(new Rectangle(108, 10, 690, 472));
          createPanel.setLayout(null);
          jLabel1.setText("NRIC:");
          jLabel1.setBounds(new Rectangle(14, 6, 41, 17));
          jLabel2.setText("Name:");
          jLabel2.setBounds(new Rectangle(14, 48, 41, 17));
          jLabel3.setText("Address:");
          jLabel3.setBounds(new Rectangle(14, 90, 57, 17));
          jLabel4.setText("Salary:");
          jLabel4.setBounds(new Rectangle(14, 132, 41, 17));
          jLabel5.setText("Contact No:");
          jLabel5.setBounds(new Rectangle(14, 174, 68, 17));
          jLabel6.setText("Marital Status:");
          jLabel6.setBounds(new Rectangle(14, 216, 83, 17));
          jLabel7.setText("Position:");
          jLabel7.setBounds(new Rectangle(14, 258, 58, 17));
          jLabel8.setText("D.O.B:");
          jLabel8.setBounds(new Rectangle(14, 300, 41, 17));
          jLabel9.setText("Team:");
          jLabel9.setBounds(new Rectangle(14, 342, 41, 17));
          nricNo.setText("jTextField1");
          nricNo.setBounds(new Rectangle(101, 3, 63, 21));
          name.setText("jTextField2");
          name.setBounds(new Rectangle(101, 44, 63, 21));
          singleRadio.setSelected(true);
          singleRadio.setText("Single");
          singleRadio.setBounds(new Rectangle(102, 210, 103, 25));
          marriedRadio.setText("Married");
          marriedRadio.setBounds(new Rectangle(221, 210, 103, 25));
          divorcedRadio.setText("Divorced");
          divorcedRadio.setBounds(new Rectangle(340, 210, 103, 25));
          position.setBounds(new Rectangle(102, 256, 128, 24));
          team.setBounds(new Rectangle(102, 337, 128, 24));
          address.setText("jTextField3");
          address.setBounds(new Rectangle(101, 87, 63, 21));
          salary.setText("jTextField4");
          salary.setBounds(new Rectangle(101, 130, 63, 21));
          contactNo.setText("jTextField5");
          contactNo.setBounds(new Rectangle(101, 171, 63, 21));
          dob.setText("jTextField6");
          dob.setBounds(new Rectangle(103, 299, 63, 21));
          submitButton.setText("Submit");
          submitButton.setBounds(new Rectangle(114, 409, 79, 27));
          clearButton.setText("Clear");
          clearButton.setBounds(new Rectangle(332, 409, 79, 27));
          retrieveButton.setText("Retrieve");
          retrieveButton.setBounds(new Rectangle(356, 0, 105, 27));
          createPanel.add(clearButton, null);
          createPanel.add(submitButton, null);
          createPanel.add(jLabel1, null);
          createPanel.add(nricNo, null);
          createPanel.add(jLabel2, null);
          createPanel.add(name, null);
          createPanel.add(jLabel3, null);
          createPanel.add(address, null);
          createPanel.add(jLabel4, null);
          createPanel.add(salary, null);
          createPanel.add(jLabel5, null);
          createPanel.add(contactNo, null);
          createPanel.add(jLabel6, null);
          createPanel.add(singleRadio, null);
          createPanel.add(marriedRadio, null);
          createPanel.add(divorcedRadio, null);
          createPanel.add(jLabel7, null);
          createPanel.add(position, null);
          createPanel.add(jLabel8, null);
          createPanel.add(dob, null);
          createPanel.add(jLabel9, null);
          createPanel.add(team, null);
          createPanel.add(retrieveButton, null);
          add(createPanel);

Answer 1

1. make createPanel an instance variable
public class PlayerTab extends JPanel implements
ActionListener{JPanel createPanel = null;
2. consistent with how you are coding, add the panel,
public void actionPerformed(ActionEvent e)
String cmd = e.getActionCommand();
if ("Create".equals(cmd))
{if( null == createPanel ) {
createPanel = new CreatePanel();
createPanel.setBounds( 20, 16, 300, 300 );
add( createPanel, null );
createPanel.show();
}//close of ifyou can also search for the specific panel, remove and then add a new instance rather then reusing the same createPanel once it is instantiated.