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Is it possible to change the height of each grid in a GridLayout?

I am trying to create a simple menu interface with 4 rows of various buttons and labels using GridLayout with FlowLayout inside each grid for organising the elements. However the space for the buttons and labels which should only take 1 line takes up a huge amount of space.
This is what my interface looks like minimized:
This is what it looks like maximized:
I am looking to set the maximum size of the labels panels/grid so that it only takes a small amount of space.
I am trying to make all the elements visible without anything being hidden with as small a window size as possible like this:
This is my code:
public class Window extends JFrame{
public Window() {
super("TastyThai Menu Ordering");
}
public static void main(String[] args) {
Window w = new Window();
w.setSize(500, 500);
w.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel title = new JLabel("TastyThai Menu Order", SwingConstants.CENTER);
title.setFont(title.getFont().deriveFont(32f));
//generate page title
Container titlePanel = new JPanel(); // used as a container
titlePanel.setBackground(Color.WHITE);
FlowLayout flow = new FlowLayout(); // Create a layout manager
titlePanel.setLayout(flow);// assign flow layout to panel
titlePanel.add(title); // add label to panel
w.getContentPane().add(BorderLayout.NORTH,titlePanel);
//generate row containers
Container r1 = new JPanel(new FlowLayout());
Container r2 = new JPanel(new FlowLayout());
Container r3 = new JPanel(new FlowLayout());
Container r4 = new JPanel(new FlowLayout());
//generate mains radio buttons
Container mains = new JPanel(new GridLayout(7, 0));
mains.setBackground(Color.RED);
JLabel mainsHeader = new JLabel("Mains");
mains.add(mainsHeader);
String[] mainsChoices = {"Vegetarian", "Chicken", "Beef", "Pork", "Duck", "Seafood Mix"};
JRadioButton[] mainsRadioButton = new JRadioButton[6];
ButtonGroup mainsButtons = new ButtonGroup();
for(int i = 0; i < mainsChoices.length; i++) {
mainsRadioButton[i] = new JRadioButton(mainsChoices[i]);
mains.add(mainsRadioButton[i]);
mainsButtons.add(mainsRadioButton[i]);
}
//generate noodles radio buttons
Container noodles = new JPanel(new GridLayout(7, 0));
noodles.setBackground(Color.GREEN);
JLabel noodlesHeader = new JLabel("Noodles");
noodlesHeader.setFont(noodlesHeader.getFont().deriveFont(24f));
noodles.add(noodlesHeader);
String[] noodlesChoices = {"Pad Thai", "Pad Siew", "Ba Mee"};
JRadioButton[] noodlesRadioButton = new JRadioButton[3];
ButtonGroup noodlesButtons = new ButtonGroup();
for(int i = 0; i < noodlesChoices.length; i++) {
noodlesRadioButton[i] = new JRadioButton(noodlesChoices[i]);
noodles.add(noodlesRadioButton[i]);
noodlesButtons.add(noodlesRadioButton[i]);
}
//generate sauces radio buttons
Container sauces = new JPanel(new GridLayout(7, 0));
sauces.setBackground(Color.BLUE);
JLabel saucesHeader = new JLabel("Sauce");
saucesHeader.setFont(saucesHeader.getFont().deriveFont(24f));
sauces.add(saucesHeader);
String[] saucesChoices = {"Soy Sauce", "Tamarind Sauce"};
JRadioButton[] saucesRadioButton = new JRadioButton[2];
ButtonGroup saucesButtons = new ButtonGroup();
for(int i = 0; i < saucesChoices.length; i++) {
saucesRadioButton[i] = new JRadioButton(saucesChoices[i]);
sauces.add(saucesRadioButton[i]);
saucesButtons.add(saucesRadioButton[i]);
}
//generate extras check boxes
Container extras = new JPanel(new GridLayout(7, 0));
extras.setBackground(Color.YELLOW);
JLabel extrasHeader = new JLabel("Extra");
extrasHeader.setFont(extrasHeader.getFont().deriveFont(24f));
extras.add(extrasHeader);
String[] extrasChoices = {"Mushroom", "Egg", "Broccoli", "Beansrpout", "Tofu"};
JCheckBox[] extrasBoxes = new JCheckBox[5];
for(int i = 0; i < extrasChoices.length; i++) {
extrasBoxes[i] = new JCheckBox(extrasChoices[i]);
extras.add(extrasBoxes[i]);
}
JLabel selectionPrice = new JLabel("Selection Price: $ ");
JLabel selectionPriceVal = new JLabel("_______________");
JButton addToOrder = new JButton("Add to Order");
JLabel totalPrice = new JLabel("Total Price: $ ");
JLabel totalPriceVal = new JLabel("_______________");
JButton clearOrder = new JButton("Clear Order");
JRadioButton pickUp = new JRadioButton("Pick Up");
JRadioButton delivery = new JRadioButton("Delivery");
ButtonGroup pickupDelivery = new ButtonGroup();
pickupDelivery.add(pickUp);
pickupDelivery.add(delivery);
JButton completeOrder = new JButton("Complete Order");
Container menuSelection = new JPanel(new GridLayout(4,0));
menuSelection.add(r1);
r1.add(mains);
r1.add(noodles);
r1.add(sauces);
r1.add(extras);
menuSelection.add(r2);
r2.add(selectionPrice);
r2.add(selectionPriceVal);
r2.add(addToOrder);
menuSelection.add(r3);
r3.add(totalPrice);
r3.add(totalPriceVal);
r3.add(clearOrder);
menuSelection.add(r4);
r4.add(pickUp);
r4.add(delivery);
r4.add(completeOrder);
w.getContentPane().add(BorderLayout.CENTER, menuSelection);
w.setVisible(true);
}
}

GridLayout does not support that. All rectangles have the same size.
Take a look at the GridBagLayout, which supports dynamic resizing and much more.

Random Number won't appear in a JTextField

I have a problem.I created a program that will add two random numbers. I'm trying to put a Math.random() in a JTextField but it won't appear. Here's my code by the way:
public class RandomMathGame extends JFrame {
public RandomMathGame(){
super("Random Math Game");
int random2;
JButton lvl1 = new JButton("LEVEL 1");
JButton lvl2 = new JButton("LEVEL 2");
JButton lvl3 = new JButton("LEVEL 3");
JLabel line1 = new JLabel("Line 1: ");
final JTextField jtf1 = new JTextField(10);
JLabel line2 = new JLabel("Line 2: ");
final JTextField jtf2 = new JTextField(10);
JLabel result = new JLabel("Result: ");
final JTextField jtf3 = new JTextField(10);
JButton ans = new JButton("Answer");
JLabel score = new JLabel("Score: ");
JTextField jtf4 = new JTextField(3);
JLabel itm = new JLabel("Number of Items: ");
JTextField items = new JTextField(3);
FlowLayout flo = new FlowLayout();
setLayout(flo);
add(lvl1);
add(lvl2);
add(lvl3);
add(line1);
add(jtf1);
add(line2);
add(jtf2);
add(result);
add(jtf3);
add(ans);
add(score);
add(jtf4);
add(itm);
add(items);
setSize(140,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
lvl1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int i, j = 10;
int i1 = Integer.valueOf(jtf1.getText());
int i2 = Integer.valueOf(jtf2.getText());
int i3 = i1 + i2;
final int random1 = (int)(Math.random() * 10 + 1);
for (i = 0; i <= j + 1; i++){
try{
jtf1.setText(String.valueOf(random1));
jtf2.setText(String.valueOf(random1));
jtf3.setText(String.valueOf(i3));
}catch(Exception ex){
ex.printStackTrace();
}
}
}
});
}
Never mind the lvl2 and lvl3 because it's the same in lvl1. And also, I want to loop them 10 times. I'm having difficulties on putting up those codes. Can someone help me? Thanks for your help. :)

Updating text fields in a loop won't produce the animated display that you likely want; only the last update will be seen. Instead, use a javax.swing.Timer to periodically update the fields. Related examples may be found here, here and here.

Adding Components to Frame using Absolute Positioning

I am creating a simple Tic Tac Toe Application in Swing using setBounds (null Layout).
My problem is that whichever component i add in the end, is not visible in the frame, or distorts the complete GUI.
My code would better explain this
import java.awt.*;
import javax.swing.*;
class ZeroKata
{
ButtonGroup p1group,p2group;
Font f;
JButton begin,b1,b2,b3,b4,b5,b6,b7,b8,b9;
JCheckBox p1K,p2K,p1Z,p2Z;
JFrame frame;
JLabel player1,player2,p1Name,p2Name,p1Symbol,p2Symbol,status,dummy; // dummy label for my problem
JPanel buttons;
JTextField name1,name2;
private void addComponents(Container parent,JComponent...c)
{
for(JComponent C:c)
parent.add(C);
}
public ZeroKata()
{
frame = new JFrame("Tic Tac Toe");
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
frame.setSize(900,650);
frame.setResizable(true);
frame.setVisible(true);
buttons = new JPanel();
buttons.setLayout(new GridLayout(3,3,10,10));
begin = new JButton("START GAME");
b1 = new JButton(" ");
b2 = new JButton(" ");
b3 = new JButton(" ");
b4 = new JButton(" ");
b5 = new JButton(" ");
b6 = new JButton(" ");
b7 = new JButton(" ");
b8 = new JButton(" ");
b9 = new JButton(" ");
p1K = new JCheckBox("X");
p1Z = new JCheckBox("O");
p2K = new JCheckBox("X");
p2Z = new JCheckBox("O");
p1group = new ButtonGroup();
p2group = new ButtonGroup();
p1group.add(p1K);
p1group.add(p1Z);
p2group.add(p2K);
p2group.add(p2Z);
name1 = new JTextField(30);
name2 = new JTextField(30);
f = new Font("Georgia",Font.PLAIN,38);
player1 = new JLabel (" << PLAYER 1 >>");
p1Name = new JLabel ("NAME : ");
p1Symbol = new JLabel ("SYMBOL : ");
player2 = new JLabel ("<< PLAYER 2 >>");
p2Name = new JLabel ("NAME : ");
p2Symbol = new JLabel ("SYMBOL : ");
status = new JLabel ("GAME STATUS -->> ");
dummy = new JLabel (" ");
addComponents(buttons,b1,b2,b3,b4,b5,b6,b7,b8,b9);
player1.setBounds(100,100,100,30);
p1Name.setBounds(120,150,100,30);
p1Symbol.setBounds(120,200,60,30);
player2.setBounds(100,250,100,30);
p2Name.setBounds(120,300,100,30);
p2Symbol.setBounds(120,350,50,30);
name1.setBounds(200,150,150,30);
p1K.setBounds(200,200,50,30);
p1Z.setBounds(250,200,50,30);
name2.setBounds(200,300,150,30);
p2K.setBounds(200,350,50,30);
p2Z.setBounds(250,350,50,30);
buttons.setBounds(500,100,250,250);
dummy.setBounds(20,20,30,30);
begin.setBounds(200,500,150,30);
frame.add(player1);
frame.add(p1Name);
frame.add(p1Symbol);
frame.add(player2);
frame.add(p2Name);
frame.add(p2Symbol);
frame.add(name1);
frame.add(name2);
frame.add(begin);
frame.add(buttons);
frame.add(p1K);
frame.add(p1Z);
frame.add(p2K);
frame.add(p2Z);
/* u need to add a dummy label also to let GUI work correctly, dont know whyx !
frame.add(dummy); */
}
public static void main(String...args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new ZeroKata();
}
});
}
}
It is a simple code, I just don't know where I am going wrong .
Thanks in advance !

The default layout manager is a BorderLayout (see JFrame overview), set it to null to allow for absolute positioning:
frame.setLayout(null);

My problem is that whichever component i add in the end, is not
visible in the frame, or distorts the complete GUI. My code would
better explain this
you added JComponents to the already visible JFrame,
move frame.setVisible(true); as last code line, after all JComponents are added
Swing GUI should be started on Initial Threads

Grid layout columns and rows not working

Basically I am trying to attach two panels onto my frame,
my frame uses BorderLayout and the two panels will be placed North and south.
I am done with the top panel but for the bottom one I cannot get it right.
I used GridLayout for the bottom one and it's supposed to look like this.
http://i47.tinypic.com/wa0lsz.png
So here is the code for the gridlayout
public class WeaponComp extends JPanel{
protected JPanel first = new JPanel();
public WeaponComp(){
setLayout(new GridBagLayout());
setPreferredSize(new Dimension(800,550));
GridBagConstraints c = new GridBagConstraints();
JLabel ntg = new JLabel("");
JLabel oldweap = new JLabel("OLD WEAPON");
JLabel newweap = new JLabel("NEW WEAPON");
JLabel onetwohand = new JLabel ("1H / 2H");
JLabel offhand = new JLabel ("Off Hand");
JLabel dps = new JLabel ("DPS :");
JLabel str = new JLabel ("Str :");
JLabel dex = new JLabel ("Dex :");
JLabel vit = new JLabel ("Vit :");
JLabel intel = new JLabel ("Int :");
JLabel manareg = new JLabel ("Mana Regen :");
JLabel aspd = new JLabel ("Attack Speed:");
JLabel critch = new JLabel ("Crit chance:");
JLabel critdmg = new JLabel ("Crit damage:");
JTextField dpstf = new JTextField(12);
JTextField strtf = new JTextField(5);
JTextField dextf = new JTextField(5);
JTextField vittf = new JTextField(5);
JTextField inteltf = new JTextField(5);
JTextField manaregtf = new JTextField(3);
JTextField aspdtf = new JTextField(3);
JTextField critchtf = new JTextField(3);
JTextField critdmgtf = new JTextField(3);
JTextField offdpstf = new JTextField(12);
JTextField offstrtf = new JTextField(5);
JTextField offdextf = new JTextField(5);
JTextField offvittf = new JTextField(5);
JTextField offinteltf = new JTextField(5);
JTextField offmanaregtf = new JTextField(3);
JTextField offaspdtf = new JTextField(3);
JTextField offcritchtf = new JTextField(3);
JTextField offcritdmgtf = new JTextField(3);
first.setLayout(new GridLayout(3,4));
first.setPreferredSize(new Dimension(750,150));
first.add(oldweap); first.add(ntg); first.add(newweap); first.add(ntg);
first.add(onetwohand); first.add(ntg); first.add(offhand); first.add(ntg);
first.add(dps); first.add(dpstf); first.add(dps); first.add(offdpstf);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0; c.gridy = 0;
add (first,c);
}
}
Here is the current result of my program
http://i50.tinypic.com/107p9uu.png
Thank you in advance for your time and answers
PS : and in case you're wondering, yes, it has something to do with diablo 3
But I am not that ambitious, this is for learning purpose and won't have many functionality.

GridLayout is a poor choice, because all cells automatically have the same size. I suggest using MigLayout instead: http://miglayout.com
The layout code would look like this:
first.setLayout(new MigLayout("wrap 2, fill"));
first.add(oldweap);
first.add(newweap);
first.add(onetwohand);
first.add(offhand);
first.add(dps);
first.add(dpstf);
first.add(dps);
first.add(offdpstf);

You might use GroupLayout1 or a nested layout2 for the bottom panels.
See How to Use GroupLayout for details. E.G.
E.G.

Java radio buttons

I'm having trouble with my radio buttons. I can click on all three at the same time. It should be when you click on one the other one turns off?
I'm using a grid layout. So when I try group.add it doesn't work.
Example:
I have the buttons declared like this
JRadioButton seven = new JRadioButton("7 years at 5.35%", false);
JRadioButton fifteen = new JRadioButton("15 years at 5.5%", false);
JRadioButton thirty = new JRadioButton("30 years at 5.75%", false);
ButtonGroup group = new ButtonGroup();
grid.add(seven);
grid.add(fifteen);
grid.add(thirty);
This is my code:
/*Change Request #6
Write the program in Java (with a graphical user interface)
so that it will allow the user to select which way
they want to calculate a mortgage:
by input of the amount of the mortgage,
the term of the mortgage,
and the interest rate of the mortgage payment
or by input of the amount of a mortgage and
then select from a menu of mortgage loans:
- 7 year at 5.35%
- 15 year at 5.5 %
- 30 year at 5.75%
In either case, display the mortgage payment amount
and then, list the loan balance and interest paid
for each payment over the term of the loan.
Allow the user to loop back and enter a new amount
and make a new selection, or quit.
Insert comments in the program to document the program.
*/
import java.text.NumberFormat;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class WK4 extends JFrame implements ActionListener
{
int loanTerms[] = { 7, 15, 30 };
double annualRates[] = { 5.35, 5.5, 5.75 };
// Labels
JLabel AmountLabel = new JLabel(" Loan Amount $ ");
JLabel PaymentLabel = new JLabel(" Monthly Payment ");
JLabel InterestLabel = new JLabel(" Interest Rate % ");
JLabel TermLabel = new JLabel(" Years of Loan ");
// Text Fields
JTextField mortgageAmount = new JTextField(6);
JTextField Payment = new JTextField(6);
JTextField InterestRate = new JTextField(3);
JTextField Term = new JTextField(3);
// Radio Buttons
ButtonGroup radioGroup = new ButtonGroup();
JRadioButton seven = new JRadioButton("7 years at 5.35%");
JRadioButton fifteen = new JRadioButton("15 years at 5.5%");
JRadioButton thirty = new JRadioButton("30 years at 5.75%");
// Buttons
JButton exitButton = new JButton("Exit");
JButton resetButton = new JButton("Reset");
JButton calculateButton = new JButton("Calculate ");
// Text Area
JTextArea LoanPayments = new JTextArea(20, 50);
JTextArea GraphArea = new JTextArea(20, 50);
JScrollPane scroll = new JScrollPane(LoanPayments);
public WK4(){
super("Mortgage Calculator");
//Window
setSize(700, 400);
setLocation(200, 150);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel pane = new JPanel(new GridLayout(2, 2));
Container grid = getContentPane();
grid.setLayout(new GridLayout(4, 10, 0, 12)); //rows, cols, hgap, vgap
pane.add(grid);
pane.add(scroll);
grid.add(AmountLabel);
grid.add(mortgageAmount);
grid.add(InterestLabel);
grid.add(InterestRate);
grid.add(TermLabel);
grid.add(Term);
grid.add(PaymentLabel);
grid.add(Payment);
grid.add(Box.createHorizontalStrut(15));
ButtonGroup group = new ButtonGroup();
grid.add(seven);
grid.add(fifteen);
grid.add(thirty);
grid.add(calculateButton);
grid.add(resetButton);
grid.add(exitButton);
Payment.setEditable(false);
setContentPane(pane);
setContentPane(pane);
setVisible(true);
// Action Listeners
mortgageAmount.addActionListener(this);
InterestRate.addActionListener(this);
Term.addActionListener(this);
Payment.addActionListener(this);
seven.addActionListener(this);
fifteen.addActionListener(this);
thirty.addActionListener(this);
calculateButton.addActionListener(this);
exitButton.addActionListener(this);
resetButton.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
Object command = e.getSource();
if (command == exitButton) {
System.exit(0);
}
else if (command == seven) {
calcLoan(loanTerms[0], annualRates[0]);
}
else if (command == fifteen) {
calcLoan(loanTerms[1], annualRates[1]);
}
else if (command == thirty) {
calcLoan(loanTerms[2], annualRates[2]);
}
else if (command == calculateButton) {
double years = 0;
double rates = 0;
try {
years = Double.parseDouble(Term.getText());
rates = Double.parseDouble(InterestRate.getText());
}
catch (Exception ex) {
LoanPayments.setText("Invalid Amount");
return;
}
calcLoan(years, rates);
}
else if (command == resetButton) {
mortgageAmount.setText("");
Payment.setText("");
InterestRate.setText("");
Term.setText("");
LoanPayments.setText("");
}
}
private void calcLoan(double years, double rates) {
Term.setText(String.valueOf(years));
InterestRate.setText(String.valueOf(rates));
double amount = 0;
try {
amount = Double.parseDouble(mortgageAmount.getText());
}
catch (Exception ex) {
LoanPayments.setText("Invalid Amount");
return;
}
double interestRate = rates;
double intRate = (interestRate / 100) / 12;
int months = (int) years * 12;
double rate = (intRate / 12);
double payment = amount * intRate
/ (1 - (Math.pow(1 / (1 + intRate), months)));
double remainingPrincipal = amount;
double MonthlyInterest = 0;
double MonthlyAmt = 0;
NumberFormat CurrencyFormatter = NumberFormat.getCurrencyInstance();
Payment.setText(CurrencyFormatter.format(payment));
LoanPayments.setText(" Month\tPrincipal\tInterest\tEnding Balance\n");
int currentMonth = 0;
while (currentMonth < months) {
MonthlyInterest = (remainingPrincipal * intRate);
MonthlyAmt = (payment - MonthlyInterest);
remainingPrincipal = (remainingPrincipal - MonthlyAmt);
LoanPayments.append((++currentMonth) + "\t"
+ CurrencyFormatter.format(MonthlyAmt) + "\t"
+ CurrencyFormatter.format(MonthlyInterest) + "\t"
+ CurrencyFormatter.format(remainingPrincipal) + "\n");
GraphArea.append("" + remainingPrincipal);
}
}
public static void main(String[] args) {
new WK4();
}
}

You're adding the radio buttons to the grid but you also need to add them to the button group that you defined.
Maybe this:
ButtonGroup group = new ButtonGroup();
grid.add(seven);
grid.add(fifteen);
grid.add(thirty);
Should be this: ??? (Copy/paste bug?)
ButtonGroup group = new ButtonGroup();
group.add(seven);
group.add(fifteen);
group.add(thirty);
Or maybe you need to do both. The radio buttons have to belong to a container as well as a button group to be displayed and to behave properly.