How to update a GUI while it's running

Question

So I have a JTextField displayed in a GUI. What I want to do is remove the text field when someone presses enter. I have already added ActionListener. I just want to know how to automatically update it without having to minimize it or something.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Window extends JFrame{
private JTextField TextField0;
private JTextField TextField1;
private JCheckBox CheckBox0;

//CONSTRUCTOR
public Window(){
    super("Checkbox");
    setLayout(new FlowLayout());

    TextField0 = new JTextField("Add field",15);
    add(TextField0);
    CheckBox0 = new JCheckBox("");



    HandlerClass handler = new HandlerClass();
    TextField0.addActionListener(handler);
}
    //Method: HandlerClass
public class HandlerClass implements ActionListener{
    public void actionPerformed(ActionEvent event){
        if(event.getSource()==TextField0){
            CheckBox0.setText(String.format("%s",event.getActionCommand()));
        }
    }
}
}

EDIT: I figured it out guys! :D Thanks!

score 3 · Answer 1 · edited May 23 '17 at 12:11

3

Have a look at using CardLayout.The CardLayout class manages two or more components (usually JPanel instances) that share the same display space.

Add textField0 and checkBox0 to 2 separate JPanels. In the ActionListener call

checkBox0.setText(textField0.getText());

Use CardLayout#next to flip from the first to the second panel.

Example

edited May 23 '17 at 12:11

Community

1
1

answered May 24 '13 at 23:43

Reimeus

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And how is this helping the OP? – SSC May 24 '13 at 23:46
1

That worked, but i also want it to display another type of data after. – alexdr3437 May 24 '13 at 23:48
@alexdr3437 What do you mean exactly? – Reimeus May 24 '13 at 23:49
@Reimeus I want to input something into the JTextField, then have it dissappear and display what was inputted into a JCheckBox.I already have done everything, but I want it to update instantly instead of have to minimize/maximize it. – alexdr3437 May 24 '13 at 23:51
I'm guessing you're calling remove without repaint. It would help if you posted an [sscce](http://sscce.org/) of your code to take out the guesswork. – Reimeus May 24 '13 at 23:54
JCheckBox? Are you sure you don't mean `JList`? Anyway see update – Reimeus May 25 '13 at 00:01
I was just about to, I just had to make a few changes to it first. – alexdr3437 May 25 '13 at 00:02
I am guessing I'll probably have to change it to JPanel – alexdr3437 May 25 '13 at 00:03

score 3 · Accepted Answer · answered May 24 '13 at 23:48

3

Assuming it lives in a container, such as a JPanel, use the remove() method, and ask for the panel to repaint:

panel.remove(textField);
panel.revalidate();
panel.repaint();

answered May 24 '13 at 23:48

ashatch

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1
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score 0 · Answer 3 · answered May 24 '13 at 23:46

0

You must revalidate() and repaint() the container.

answered May 24 '13 at 23:46

SSC

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score 0 · Answer 4 · answered May 24 '13 at 23:48

Change the declaration of the JTextField to public / private depending on how you access it:

public JTextField jtf = new JTextField();

And when you create your window:

jtf = new JTextField();
jtf.addActionListener {
removeJTF();

Use this code to remove the JTextField:

public void removeJTF() {

    exampleFrame.remove(jtf);
}

How to update a GUI while it's running

4 Answers4