How to add text to JFrame?
Instead of wasting your time to design a JFrame
just to display a error message, you can use an JOptionPane
which is by default modal:
import javax.swing.JOptionPane;
public class Main {
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "Your message goes here!","Message", JOptionPane.ERROR_MESSAGE);
}
}
P.S. Stop using Windowbuilder if you want to learn Swing.
To create a label for text:
JLabel label1 = new JLabel("Test");
To change the text in the label:
label1.setText("Label Text");
And finally to clear the label:
label1.setText("");
And all you have to do is place the label in your layout, or whatever layout system you are using, and then just add it to the JFrame...