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Change JTextField height on Swing

I'm trying to fix the height of the "amountField" text field, but I can't.
I would like the height of amountField to have the same height as the JComboBox that it's above, so it looks better.
Right now, the JTextField looks very tall compared with the rest of design.
I've tried everything that I've read in this forum, but nothing seems to work.
I don't know if it's relevant, but this whole JPanel (WithdrawalScreen) is inside another JPanel with BorderLayout. This panel is the center part of it
Thanks
PictureHere
public class WithdrawalScreen extends JPanel {
Public JPanel init() {
this.setLayout(new GridLayout(0,1));
account = new JLabel("account");
accountSelect = new JComboBox(labels);
amount = new JLabel("amount");
amountField = new JTextField("");
submit = new JButton("SUBMIT");
this.add(account);
this.add(accountSelect);
this.add(amount);
this.add(amountField);
this.add(submit);
return this;
}
}

Try creating the Grid Layout with 5 rows and 1 column. I think the height is messed up because you are not setting the constructor arguments properly.
new GridLayout(5,1);

Grid layout will stretch the component and give the same size to all of its components. In order to keep the "default" size of each component, you can use BoxLayout with BoxLayout.Y_AXIS parameter in its constructor. Another way would be to use a dummy-nested JPanel with another layout. Let's say FlowLayout.
JTextField textField = new JTextField(10);
JPanel nestedPanel = new JPanel(new FlowLayout());
nestedPanel.add(textField);
gridLayoutPanel.add(nestedPanel);
JTextField will not be stretched. nestedPanel will be. Do some experiments yourself and you will find the way that fits your needs.
A link that will help you: A visoual guide to Layout Managers.

Java Styling - Spacing

So I've been learning Java for the very first time and it's time for me to attempt my first project. And I'm stuck at the "first hurdle" haha.
The issue I have is the fact that I don't actually know how to space J Items apart.
I have a 250,350 window for a Log In form with a JLabel, a JTextField for username and JLabel JPassword for Password with a JButton at the bottom.
What I want to do now is style it so that the spacing between the top and the bottom of the form makes it so that the form is centered as well as adding a line's height space between the JLabel and the JTextField. (Basically a \n type deal but that isn't working.)
Hopefully this makes sense, if not, I apologise and I'll try to rephrase/add code!
public Game() {
this.setSize(250,350);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setTitle("Sticket Cricket - Login");
JPanel loginMenuPanel = new JPanel();
loginButton = new JButton("Login");
usernameField = new JTextField();
usernameField.setColumns(10);
passwordField = new JPasswordField();
passwordField.setColumns(10);
passwordField.requestFocus();
usernameLabel = new JLabel("Username: ");
passwordLabel = new JLabel("Password: ");
this.add(loginMenuPanel);
loginMenuPanel.add(usernameLabel);
loginMenuPanel.add(usernameField);
loginMenuPanel.add(passwordLabel);
loginMenuPanel.add(passwordField);
loginMenuPanel.add(loginButton);
this.setVisible(true);
}

Short Answer:
Create a JPanel, set the layoutmanger of the panel (some examples, GridLayout, BorderLayout, Check out the tutorial here where more of these are explained)
Then add your components to this panel accordingly
For the layout you are looking for it would possibly be easier to use an IDE to create this, I find Net Beans to be the easiest for doing this.
My recommendation would be for you to create a JPanel with a grid layout of 2 columns and 2 rows, to this add you JLabels and Text fields for the logon name and password.
Then create another JPanel possibly BorderLayout or Flow Layout and add the above panel to this then add this parent panel to the frame.

How to improve GUI by changing BoxLayout into a different LayoutManager?

I've a big problem with Swing in Java, I used BoxLayout for this but still it looks bad.
Any suggestions about my usage of layouts, or how to change it to look like in assumptions? (here are assumptions)
Container main = new Container();
Container left = new Container();// here goin buttons
Container right = new Container(); // here goin tabs + more buttons, textfields and other stuff
BoxLayout lewyL = new BoxLayout(left, BoxLayout.Y_AXIS);
left.setLayout(lewyL);
left.add(rastrowa); //radiobutton
left.add(wektorowa);//radiobutton
left.add(apDwuliniowa);//checkbox
left.add(wczytaj);//button
left.add(zapisz);//obutton
left.add(wyczysc);//button
BoxLayout prawyL = new BoxLayout(right, BoxLayout.Y_AXIS);
right.setLayout(prawyL);
right.add(zakladki);// tabs (mostly i use BoxLayout but for last one i need something more "complicated")
EDIT: I almost solve this problem, I need to move all elements to left (how it look like)but I have no idea how ;/ Here is constructor of this class.
JLabel label = new JLabel("O wektor");
JLabel labelA = new JLabel("a:");
JLabel labelB = new JLabel("b:");
JButton wykonaj = new JButton("Wykonaj");
JTextField a = new JTextField(5);
JTextField b = new JTextField(5);
add(label);
add(labelA);
add(a);
add(labelB);
add(b);
add(wykonaj);

There's nothing wrong with the way it looks (in my opinion), but if you want it to look a little better, why don't you convert the left panel (which is 6x1) into a 3x2 panel, with the checkboxes/radiobuttons on the left, and buttons on the right? Sounds like a job for GridLayout - one of my favorite classes...
JPanel leftPanel = new JPanel(new GridLayout(3,2));
leftPanel.add(rastrowa); //radiobutton
leftPanel.add(wczytaj); //button
leftPanel.add(wektorowa); //radiobutton
leftPanel.add(zapisz); //obutton
leftPanel.add(apDwuliniowa); //checkbox
leftPanel.add(wyczysc); //button
Note that the 3,2 defines the number of rows,columns. When adding panels, they are added to the grid from left-to-right, and top-to-bottom. GridLayout also auto-sizes the components, so all the buttons etc will be the same width and height, making it look more consistent.
The GridLayout documentation might be useful, and the Visual Guide to Layout Managers is a great place to see other layout managers that might work better for your different situations. I personally find BorderLayout and GridLayout to be the most useful, and cover about 95% of the situations I ever need for my GUIs.

center a panel in a box layout row in java

I have this code below to create a page inside of a tab.
I want each layout in one row of the overall box layout but i want the elements to stay in their original size and not expand to fill the width of the overall window. does anyone know what lines of code i need to change or what is the best way of doing this?! The image attached shows what it looks like at the moment
public void createPage4() {
panel4 = new JPanel();
panel4.setLayout(new BoxLayout(panel4, BoxLayout.Y_AXIS));
navigatePanel = new JPanel();
navigatePanel.setLayout(new BoxLayout(navigatePanel, BoxLayout.X_AXIS));
previousButton.setText("Previous");
previousButton.setEnabled(false);
navigatePanel.add(previousButton);
navigatePanel.add(Box.createHorizontalStrut(10));
indexTextField.setHorizontalAlignment(JTextField.CENTER);
navigatePanel.add(indexTextField);
navigatePanel.add(Box.createHorizontalStrut(10));
ofLabel.setText("of");
navigatePanel.add(ofLabel);
navigatePanel.add(Box.createHorizontalStrut(10));
maxTextField.setHorizontalAlignment(JTextField.CENTER);
maxTextField.setEditable(false);
navigatePanel.add(maxTextField);
navigatePanel.add(Box.createHorizontalStrut(10));
nextButton.setText("Next");
nextButton.setEnabled(false);
navigatePanel.add(nextButton);
panel4.add(navigatePanel);
displayPanel = new JPanel();
displayPanel.setLayout(new GridLayout(5, 2, 4, 4));
firstNameLabel.setText("First Name:");
displayPanel.add(firstNameLabel);
displayPanel.add(firstNameTextField);
lastNameLabel.setText("Last Name:");
displayPanel.add(lastNameLabel);
displayPanel.add(lastNameTextField);
panel4.add(displayPanel);
}
image

BoxLayout accepting Min, Max and PreferredSize that came from JComponents
I want each layout in one row of the overall box layout but i want the elements to stay in their original size and not expand to fill the width of the overall window
I'd be to use proper LayoutManager, FlowLayout accepting only PreferredSize, and/or all JComponents layed by GridBagLayout without defininitions of GridBagConstraints stays unchanged on containers resize
doesn't make me sence (my view) for why reason (sure this is your job), but for better help sooner post an SSCCE

The easiest way is to add your panel4 to an other panel that uses GridBagLayout and then add that panel to the container. Then it will be centered and nothing will stretch on resize.
JPanel centeredPanel = new JPanel(new GridBagLayout());
centeredPanel.add(panel4); // add this panel to the container
You should also construct the textfields with a specified number of columns, like
indexTextField = new JTextField(20);

Align text in JLabel to the right

I have a JPanel with some JLabel added with the add() method of JPanel. I want to align the JLabel to the right like the image below but I don't know how to do that. Any Idea? Thanks!

This can be done in two ways.
JLabel Horizontal Alignment
You can use the JLabel constructor:
JLabel(String text, int horizontalAlignment)
To align to the right:
JLabel label = new JLabel("Telephone", SwingConstants.RIGHT);
JLabel also has setHorizontalAlignment:
label.setHorizontalAlignment(SwingConstants.RIGHT);
This assumes the component takes up the whole width in the container.
Using Layout
A different approach is to use the layout to actually align the component to the right, whilst ensuring they do not take the whole width. Here is an example with BoxLayout:
Box box = Box.createVerticalBox();
JLabel label1 = new JLabel("test1, the beginning");
label1.setAlignmentX(Component.RIGHT_ALIGNMENT);
box.add(label1);
JLabel label2 = new JLabel("test2, some more");
label2.setAlignmentX(Component.RIGHT_ALIGNMENT);
box.add(label2);
JLabel label3 = new JLabel("test3");
label3.setAlignmentX(Component.RIGHT_ALIGNMENT);
box.add(label3);
add(box);

JLabel label = new JLabel("fax", SwingConstants.RIGHT);

To me,
it seems as if your actual intention is to put different words on different lines.
But let me answer your first question:
JLabel lab=new JLabel("text");
lab.setHorizontalAlignment(SwingConstants.LEFT);
And if you have an image:
JLabel lab=new Jlabel("text");
lab.setIcon(new ImageIcon("path//img.png"));
lab.setHorizontalTextPosition(SwingConstants.LEFT);
But, I believe you want to make the label such that there are only 2 words on 1 line.
In that case try this:
String urText="<html>You can<br>use basic HTML<br>in Swing<br> components,"
+"Hope<br> I helped!";
JLabel lac=new JLabel(urText);
lac.setAlignmentX(Component.RIGHT_ALIGNMENT);