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How do I output the text input and combobox on JList (java)

import java.awt.GridLayout;
import java.awt.BorderLayout;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.JList;
public class PetUI extends JFrame implements ActionListener{
JButton btnAdd = new JButton("Add");
JButton btnCancel = new JButton("Cancel");
JTextField txtbox1 = new JTextField();
JTextField txtbox2 = new JTextField();
public PetUI(){
super("Pet Shop");
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
//inputs
panel1.setLayout(new GridLayout(3,4));
add(panel1,BorderLayout.NORTH);
panel1.add(new JLabel("Pet Type: "));
String [] animals = {"Cat","Dog","Rabbit"};
JComboBox petlist = new JComboBox(animals);
panel1.add(petlist);
panel1.add(new JLabel("Breed: "));
panel1.add(txtbox1);
panel1.add(new JLabel("Name: "));
panel1.add(txtbox2);
//buttons
add(panel2,BorderLayout.CENTER);
panel2.add(btnAdd);
btnAdd.addActionListener(this);
panel2.add(btnCancel);
setVisible(true);
setSize(300,300);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e){
}
public static void main(String [] args){
new PetUI();
}
}
How do I do this? Output it to a JList.
My teacher didn't taught this to us.
And I tried to search it online but it didn't worked out.
I've been through so many YT tutorials already and it didn't worked out.

Welcome to SO. Here is something very basic to get you started:
public class PetUI extends JFrame implements ActionListener{
JButton btnAdd = new JButton("Add");
JButton btnCancel = new JButton("Cancel");
JTextField txtbox1 = new JTextField();
JTextField txtbox2 = new JTextField();
JList<String> list;
DefaultListModel<String> listModel;
JComboBox<String> petList;
public PetUI(){
super("Pet Shop");
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
//inputs
panel1.setLayout(new GridLayout(3,4));
add(panel1,BorderLayout.NORTH);
panel1.add(new JLabel("Pet Type: "));
String [] animals = {"Cat","Dog","Rabbit"};
petList = new JComboBox<>(animals);
panel1.add(petList);
panel1.add(new JLabel("Breed: "));
panel1.add(txtbox1);
panel1.add(new JLabel("Name: "));
panel1.add(txtbox2);
//buttons
add(panel2,BorderLayout.CENTER);
panel2.add(btnAdd);
btnAdd.addActionListener(this);
panel2.add(btnCancel);
//JList
listModel = new DefaultListModel<>();
list = new JList<>(listModel);
list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
list.setVisibleRowCount(-1);
JPanel panel3 = new JPanel();
panel3.setLayout(new FlowLayout(FlowLayout.LEFT));
panel3.add(list);
add(panel3,BorderLayout.SOUTH);
setVisible(true);
setSize(300,300);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
#Override
public void actionPerformed(ActionEvent e){
StringBuilder sb = new StringBuilder((String)petList.getSelectedItem());
sb.append(" ") //add space
.append(txtbox1.getText())
.append(" ")
.append(txtbox2.getText());
listModel.addElement(sb.toString());
}
public static void main(String [] args){
new PetUI();
}
}

Java JButton Can't open new form

I am a new to Java, I met a problem. Once I click the Button, it never shows me another form, just disappear. You can see, I set the button ActionListener, but it only run the second line (close the current form).
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class login implements ActionListener {
public login(){
JFrame frame = new JFrame("Login");
frame.setLayout(new GridLayout(5,1));
JLabel label1 = new JLabel("User Name:");
JPanel panel1 = new JPanel();
frame.add(new JPanel());
frame.add(panel1);
panel1.add(label1);
JLabel label2 = new JLabel("Password:");
JPanel panel2 = new JPanel();
frame.add(panel2);
panel2.add(label2);
JPanel panel3 = new JPanel();
JButton button1 = new JButton("Register");
//button1.addActionListener(this);
JButton button2 = new JButton("Login");
//button2.addActionListener(this);
JButton button3 = new JButton("Cancel");
//button3.addActionListener(this);
panel3.add(button1);
panel3.add(button2);
panel3.add(button3);
frame.add(panel3);
JTextField JTF = new JTextField(12);
JPasswordField JPF = new JPasswordField(12);
panel1.add(JTF);
panel2.add(JPF);
frame.setResizable(false);
frame.setVisible(true);
frame.setSize(300, 200);
frame.setLocation(300,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
button1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
new register();
frame.dispose();
}
});
}
public static void main(String[] args){
new login();
}
public void actionPerformed(ActionEvent e ){
}
}

Adding a JPanel to an ActionListener

I have created a JPanel that has all the JRadioButtons on it that I need (it is called PortSettings). I also have a button, called port settings, when the user clicks the button, I need the JPanel to come up and display the radio buttons. I have tried to add the JPanel to the actionlistener but it doesn't work. My code is below. I have deleted all other ActionListener's from the other buttons except for the portsettings buttons. If this question is confusing I'm sorry. It's really hard to explain what I need to do. I have uploaded a drawing of what the panel will look like as well as a screenshot of my program.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TestApplication implements ActionListener {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(1000, 1000);
frame.setTitle("RBA Test Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JTextArea text = new JTextArea();
JLabel logLabel = new JLabel("Input/Output Log");
JRadioButton apprve = new JRadioButton("Approve");
JRadioButton decline = new JRadioButton("Decline");
JRadioButton ethernet = new JRadioButton("Ethernet");
JRadioButton rs = new JRadioButton("RS232");
JRadioButton usbcdc = new JRadioButton("USB_CDC");
JRadioButton usbhid = new JRadioButton("USB_HID");
JButton next = new JButton("Next");
JButton ok = new JButton("OK");
JButton cancel = new JButton("Cancel");
JPanel PortSettings = new JPanel();
PortSettings.add(ethernet);
PortSettings.add(rs);
PortSettings.add(usbcdc);
PortSettings.add(usbhid);
PortSettings.add(next);
PortSettings.add(cancel);
JButton initialize = new JButton("Initialize");
JButton connect = new JButton("Connect");
JButton disconnect = new JButton("Disconnect");
JButton shutdown = new JButton("Shut Down");
JButton portsettings = new JButton("Port Settings");
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
JButton online = new JButton("Go Online");
JButton offline = new JButton("Go Offline");
JButton status = new JButton("Status");
JButton reboot = new JButton("Reboot");
JButton account = new JButton("Account");
JButton amount = new JButton("Amount");
JButton reset = new JButton("Reset");
JButton approvordecl = new JButton("Approve / Decline");
JButton test = new JButton("Test Button #1");
JButton testing = new JButton("Test Button #2");
JRadioButton button = new JRadioButton("Radio Button");
JRadioButton button2 = new JRadioButton("Radio Button");
JCheckBox checkbox = new JCheckBox("Check Box");
JCheckBox checkbox2 = new JCheckBox("Check Box");
JPanel testPanel = new JPanel();
testPanel.add(button);
testPanel.add(button2);
testPanel.add(checkbox2);
JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);
JPanel llpPanel = new JPanel();
llpPanel.add(online);
llpPanel.add(offline);
llpPanel.add(status);
llpPanel.add(reboot);
llpPanel.add(account);
llpPanel.add(amount);
llpPanel.add(reset);
llpPanel.add(approvordecl);
JPanel textPanel = new JPanel(new BorderLayout());
textPanel.add(logLabel);
frame.add(logLabel);
JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");
JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);
frame.pack();
}
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}
I have tried to add a JFrame to the ActionListener then add the JPanel to the JFrame but nothing happens when I click the Port Settings button. Also, when I tried to add the JPanel to the JFrame it told me to put final in front of JPanel PortSettings = new JPanel();. Here is the code.
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TestApplication implements ActionListener {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(1000, 1000);
frame.setTitle("RBA Test Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JTextArea text = new JTextArea();
JLabel logLabel = new JLabel("Input/Output Log");
JRadioButton apprve = new JRadioButton("Approve");
JRadioButton decline = new JRadioButton("Decline");
JRadioButton ethernet = new JRadioButton("Ethernet");
JRadioButton rs = new JRadioButton("RS232");
JRadioButton usbcdc = new JRadioButton("USB_CDC");
JRadioButton usbhid = new JRadioButton("USB_HID");
JButton next = new JButton("Next");
JButton ok = new JButton("OK");
JButton cancel = new JButton("Cancel");
final JPanel PortSettings = new JPanel();
PortSettings.add(ethernet);
PortSettings.add(rs);
PortSettings.add(usbcdc);
PortSettings.add(usbhid);
PortSettings.add(next);
PortSettings.add(cancel);
JPanel accountButton = new JPanel();
accountButton.add(ok);
accountButton.add(cancel);
JPanel apprvordecl = new JPanel();
apprvordecl.add(apprve);
apprvordecl.add(decline);
JPanel amountButton = new JPanel();
amountButton.add(ok);
amountButton.add(cancel);
JButton initialize = new JButton("Initialize");
JButton connect = new JButton("Connect");
JButton disconnect = new JButton("Disconnect");
JButton shutdown = new JButton("Shut Down");
JButton portsettings = new JButton("Port Settings");
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFrame port = new JFrame("Port Settings");
port.add(PortSettings);
frame.setVisible(true);
}
});
JButton online = new JButton("Go Online");
JButton offline = new JButton("Go Offline");
JButton status = new JButton("Status");
JButton reboot = new JButton("Reboot");
JButton account = new JButton("Account");
JButton amount = new JButton("Amount");
JButton reset = new JButton("Reset");
JButton approvordecl = new JButton("Approve / Decline");
JButton test = new JButton("Test Button #1");
JButton testing = new JButton("Test Button #2");
JRadioButton button = new JRadioButton("Radio Button");
JRadioButton button2 = new JRadioButton("Radio Button");
JCheckBox checkbox = new JCheckBox("Check Box");
JCheckBox checkbox2 = new JCheckBox("Check Box");
JPanel testPanel = new JPanel();
testPanel.add(button);
testPanel.add(button2);
testPanel.add(checkbox2);
JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);
JPanel llpPanel = new JPanel();
llpPanel.add(online);
llpPanel.add(offline);
llpPanel.add(status);
llpPanel.add(reboot);
llpPanel.add(account);
llpPanel.add(amount);
llpPanel.add(reset);
llpPanel.add(approvordecl);
JPanel textPanel = new JPanel(new BorderLayout());
textPanel.add(logLabel);
frame.add(logLabel);
JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");
JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);
frame.pack();
}
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}

You´re on the right track, but you do not want to add your PortSettings panel to a new JFrame but somewhere on your previously built one, assigned to the local variable frame. So your action listener should rather be
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
frame.add(PortSettings, BorderLayout.SOUTH);
frame.pack();
}
});
(This is assuming that you actually want to add it to the frame at that instant and not add it invisibly right from the start and turn it visible, like #Aleksei suggested.)
The error message about final is because you use PortSettings in an (anonymous) inner class - viz., the ActionListener. In my proposed modification the same goes for frame, so you need to adapt its declaration as well:
final JFrame frame = new JFrame();
The reason why is quite technical and beside the point right now: just do it.
If instead you want the panel to appear in a separate window, you need a JDialog for that, not a second JFrame:
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog dialog = new JDialog(frame);
dialog.add(PortSettings);
dialog.pack();
dialog.setVisible(true);
}
});
Take a look at the JOptionPane class for a rich choice of ways to get more functionality out of dialogs.

Just add the action listener to all your buttons.
like this:
yourButton.addActionListener(this);
Do that for all the buttons.
Then take your TestPalication class's actionPreformed method and do whatever:
#Override
public void actionPerformed(ActionEvent arg0) {
((JRadioButton) arg0.getSource()).setTitle("Clicked!");
}
Your question was a little bit confusing but I hope this clarifies a little bit.

Insert JTextArea into a JPanel with a JLabel

I am trying to display the drawing that I have posted. When my code runs and the user clicks Account, the panel only displays the buttons "OK" and "Cancel" (see screenshot). I have added three JTextAreas with a JLabel for each to the panel accountPanel but they don't display. My code is below.
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Component;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
public class TestApplication implements ActionListener {
public static void main(String[] args) {
JLabel input = new JLabel();
final JFrame frame = new JFrame();
frame.setSize(1000, 1000);
frame.setTitle("RBA Test Application");
frame.add(input);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JRadioButton apprve = new JRadioButton("Approve");
JRadioButton decline = new JRadioButton("Decline");
JRadioButton ethernet = new JRadioButton("Ethernet");
ethernet.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog esettings = new JDialog(frame);
esettings.setTitle("Ethernet Settings");
esettings.setSize(400, 400);
esettings.pack();
esettings.setVisible(true);
}
});
JRadioButton rs = new JRadioButton("RS232");
rs.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog rsettings = new JDialog(frame);
rsettings.setTitle("RS232 Settings");
rsettings.setSize(400, 400);
rsettings.pack();
rsettings.setVisible(true);
}
});
JRadioButton usbcdc = new JRadioButton("USB_CDC");
usbcdc.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog usbc = new JDialog(frame);
usbc.setTitle("USB_CDC Settings");
usbc.setSize(400, 400);
usbc.pack();
usbc.setVisible(true);
}
});
JRadioButton usbhid = new JRadioButton("USB_HID");
usbhid.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog usbh = new JDialog(frame);
usbh.setTitle("USB_HID Settings");
usbh.setSize(400, 400);
usbh.pack();
usbh.setVisible(true);
}
});
JButton next = new JButton("Next");
JButton aok = new JButton("OK");
JButton bok = new JButton("OK");
JButton cok = new JButton("OK");
JButton acancel = new JButton("Cancel");
JButton bcancel = new JButton("Cancel");
JButton ccancel = new JButton("Cancel");
JButton dcancel = new JButton("Cancel");
JLabel cardLabel = new JLabel("Card Number: ");
JLabel expLabel = new JLabel("Exp. Date: ");
JLabel cvvLabel = new JLabel("CVV: ");
JTextArea card = new JTextArea();
card.add(cardLabel);
JTextArea expDate = new JTextArea();
expDate.add(expLabel);
JTextArea cvv = new JTextArea();
cvv.add(cvvLabel);
final JPanel PortSettings = new JPanel();
PortSettings.add(ethernet);
PortSettings.add(rs);
PortSettings.add(usbcdc);
PortSettings.add(usbhid);
PortSettings.add(next);
PortSettings.add(bcancel);
final JPanel accountPanel = new JPanel();
accountPanel.add(bok);
accountPanel.add(ccancel);
accountPanel.add(card);
accountPanel.add(expDate);
accountPanel.add(cvv);
final JPanel apprvordecl = new JPanel();
apprvordecl.add(apprve);
apprvordecl.add(decline);
apprvordecl.add(aok);
apprvordecl.add(acancel);
final JPanel amountPanel = new JPanel();
amountPanel.add(cok);
amountPanel.add(dcancel);
input.setFont(new java.awt.Font("Tahoma", 3, 18));
input.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
input.setText("Input / Output Log");
JButton initialize = new JButton("Initialize");
JButton connect = new JButton("Connect");
JButton disconnect = new JButton("Disconnect");
JButton shutdown = new JButton("Shut Down");
JButton portsettings = new JButton("Port Settings");
portsettings.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog port = new JDialog(frame);
port.setTitle("Port Settings");
port.setSize(400, 400);
port.add(PortSettings);
port.pack();
port.setVisible(true);
}
});
JButton online = new JButton("Go Online");
JButton offline = new JButton("Go Offline");
JButton status = new JButton("Status");
JButton reboot = new JButton("Reboot");
JButton account = new JButton("Account");
account.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog accountDialog = new JDialog(frame);
accountDialog.setTitle("Account");
accountDialog.setSize(400, 400);
accountDialog.add(accountPanel);
accountDialog.pack();
accountDialog.setVisible(true);
}
});
JButton amount = new JButton("Amount");
amount.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog amount2 = new JDialog(frame);
amount2.setTitle("Amount");
amount2.setSize(400, 400);
amount2.add(amountPanel);
amount2.pack();
amount2.setVisible(true);
}
});
JButton reset = new JButton("Reset");
JButton approvordecl = new JButton("Approve / Decline");
approvordecl.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JDialog apprv = new JDialog(frame);
apprv.setTitle("Approve / Decline");
apprv.setSize(400, 400);
apprv.add(apprvordecl);
apprv.pack();
apprv.setVisible(true);
}
});
JButton test = new JButton("Test Button #1");
JButton testing = new JButton("Test Button #2");
JRadioButton button = new JRadioButton("Radio Button");
JRadioButton button2 = new JRadioButton("Radio Button");
JCheckBox checkbox = new JCheckBox("Check Box");
JCheckBox checkbox2 = new JCheckBox("Check Box");
ButtonGroup group = new ButtonGroup();
group.add(usbhid);
group.add(usbcdc);
group.add(ethernet);
group.add(rs);
ButtonGroup approvegroup = new ButtonGroup();
approvegroup.add(apprve);
approvegroup.add(decline);
JPanel testPanel = new JPanel();
testPanel.add(button);
testPanel.add(button2);
testPanel.add(checkbox2);
JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);
JPanel llpPanel = new JPanel();
llpPanel.add(online);
llpPanel.add(offline);
llpPanel.add(status);
llpPanel.add(reboot);
llpPanel.add(account);
llpPanel.add(amount);
llpPanel.add(reset);
llpPanel.add(approvordecl);
JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");
JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);
frame.pack();
}
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}

JPanel uses FlowLayout by default which respects preferred sizes. The default width of the preferred size for the JTextArea's is 0 x 0. You need to give the JTextComponent's a preferred size for them to appear. Use the constructor that specifys rows & columns:
JTextArea card = new JTextArea(5, 10);
Don't forget to make the JTextArea scrollable by enclosing it in a JScrollPane:
accountPanel.add(new JScrollPane(card));

Content in JPanel won't appear

There is no errors but when I Run it the content that I added into the JPanel won't appear, only the one not inside the JPanel appear.
import javax.swing.*;
import java.awt.*;
public class SimpleGUI extends JFrame
{
public static void main(String arg[])
{
SimpleGUI f = new SimpleGUI("GUI components");
f.setSize(600,200);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
SimpleGUI(String s)
{
setTitle(s);
setLayout(new GridLayout(3,2));
JLabel msg = new JLabel("FINAL EXAM IS JUST AROUND THE CORNER!");
JButton bt = new JButton("OK");
JLabel lb = new JLabel ("Enter your name:");
JTextField tf = new JTextField("<type name here>");
JLabel lb2 = new JLabel ("Enter age:");
JTextField tf2= new JTextField(10);
tf2.setHorizontalAlignment(JTextField.RIGHT);
JCheckBox cb = new JCheckBox("Bold",true);
JRadioButton rb1 = new JRadioButton("Red");
JTextArea ta = new JTextArea(5,20);
JList list = new JList(new Object[] {"Block A", "Block B"});
JComboBox jcb = new JComboBox(new Object[] {"Hello", "Bye"});
ImageIcon ic = new ImageIcon("music.gif");
JButton newbt = new JButton("Play",ic);
newbt.setVerticalTextPosition(JButton.TOP);
newbt.setHorizontalTextPosition(JButton.CENTER);
JPanel p1 = new JPanel();
p1.setLayout(new BorderLayout());
p1.add(lb, BorderLayout.WEST);
p1.add(tf, BorderLayout.CENTER);
p1.add(cb, BorderLayout.EAST);
JPanel p2 = new JPanel();
p2.setLayout(new BorderLayout());
p2.add(lb2, BorderLayout.WEST);
p2.add(tf2, BorderLayout.CENTER);
p2.add(rb1, BorderLayout.EAST);
JPanel p3 = new JPanel();
p3.setLayout(new BorderLayout());
p3.add(jcb);
add(ta);
add(list);
p3.add(newbt, BorderLayout.NORTH);
add(msg);
p3.add(bt, BorderLayout.SOUTH);
}
}

I've updated your code. Have a look at this version:
import javax.swing.*;
import java.awt.*;
public class SimpleGUI extends JFrame {
public static void main(String arg[]) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
SimpleGUI f = new SimpleGUI("GUI components");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
});
}
public SimpleGUI(String s) {
setTitle(s);
setLayout(new GridLayout(3, 2));
JLabel msg = new JLabel("FINAL EXAM IS JUST AROUND THE CORNER!");
JButton bt = new JButton("OK");
JLabel lb = new JLabel("Enter your name:");
JTextField tf = new JTextField("<type name here>");
JLabel lb2 = new JLabel("Enter age:");
JTextField tf2 = new JTextField(10);
tf2.setHorizontalAlignment(JTextField.RIGHT);
JCheckBox cb = new JCheckBox("Bold", true);
JRadioButton rb1 = new JRadioButton("Red");
JTextArea ta = new JTextArea(5, 20);
JList list = new JList(new Object[]{"Block A", "Block B"});
JComboBox jcb = new JComboBox(new Object[]{"Hello", "Bye"});
ImageIcon ic = new ImageIcon("music.gif");
JButton newbt = new JButton("Play", ic);
newbt.setVerticalTextPosition(JButton.TOP);
newbt.setHorizontalTextPosition(JButton.CENTER);
JPanel p1 = new JPanel();
p1.setLayout(new BorderLayout());
p1.add(lb, BorderLayout.WEST);
p1.add(tf, BorderLayout.CENTER);
p1.add(cb, BorderLayout.EAST);
JPanel p2 = new JPanel();
p2.setLayout(new BorderLayout());
p2.add(lb2, BorderLayout.WEST);
p2.add(tf2, BorderLayout.CENTER);
p2.add(rb1, BorderLayout.EAST);
JPanel p3 = new JPanel();
p3.setLayout(new BorderLayout());
p3.add(jcb);
add(ta);
add(list);
p3.add(newbt, BorderLayout.NORTH);
add(msg);
p3.add(bt, BorderLayout.SOUTH);
/**
* Need to add the following lines
*/
this.add(p1);
this.add(p2);
this.add(p3);
this.pack();
this.setVisible(true);
}
}
A couple of pointers:
You need to add your components to your JFrame for them to actually show up.
Any updates to the user interface must happen on the event dispatch thread. Consequently you would notice that I've added a SwingUtilites.invokeLater() to the main. Have a look at this article to understand "Threading with Swing"

Where you you add your panels to the frame? Also, forgotten my java "rules and regulations": do you need to call "super()"?