CODEWITHSUNDEEP
javaswinguser-interfacejframe
TheEagle
TheEagle

Reputation: 179

Java gui how to get a size of a textbox

Hi guys/girls i am trying to make a box which will take a user input of a number. Now i have made a text field but how do i change the size of the text feild.

This is what i got so far 

public class example extends JFrame {
    private JTextField example1;

   example() {    
        box1 = new JTextField(10);
        add(example1);

Now its just iam trying 2 get like a square size text feild which will allow the user to write a number in there. It will be a one diget number. Any help would be great. Thanks

Upvotes: 1

Views: 1214

Answers (2)

Hovercraft Full Of Eels
Hovercraft Full Of Eels

Reputation: 285460

You state:

iam trying to make a caluclater. So i am using the box to hold a number.

Most calculators that I know of don't have a small field for displaying the current number but rather they have a text component that covers the entire width of the top of their GUI, and the key to achieving this with Java Swing is in using the right layout managers and the right placement of your components. For instance, this GUI design could be solved by using a container that uses BorderLayout, and placing your display JTextField (not JTextArea) in the BorderLayout.PAGE_START position and the buttons in another JPanel held in the main container's BorderLayout.CENTER position.

For example, please look at the code in my answer here. It creates a GUI that looks like so: enter image description here. This shows two calculators that only differ based on the size of fonts chosen.

Key code for this is:

  textField.setFont(textField.getFont().deriveFont(BTN_FONT_SIZE));

  mainPanel.setLayout(new BorderLayout(gap, gap));
  mainPanel.setBorder(BorderFactory.createEmptyBorder(gap, gap, gap, gap));
  mainPanel.add(textField, BorderLayout.PAGE_START);
  mainPanel.add(buttonPanel, BorderLayout.CENTER);

Upvotes: 4

dr3wmurphy
dr3wmurphy

Reputation: 186

JTextField uses the number of characters(# of columns) rather than a pixel size. If you're looking for a text box which you can specify the size of, use JTextArea.

Upvotes: 1

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