无法更改JLabel的文本

Question

I'm trying to change the text of a JLabel but my method doesn't even see the label

In my Gui class I have

public void setText(String message)
    {
        label03.setText(message);
    }

And for my label 03 I have

JLabel label03 = new JLabel("0");
        label03.setIcon(icon);
        label03.setBounds(204, 130, 46, 14);
        getContentPane().add(label03);

I'm using WindowBuilder to do this

Am I missing something? That my method can't seem to be able to change the label text?

Answer 1

It looks like you are declaring your variable in one method and trying to use it in another. This is a variable scoping problem.

You probably need to store your label as a field in your class, so that you can access it from multiple methods.

public class SomeClass {
  private JLabel label03; 

  public void someMethod() {
    label03 = new JLabel("0");
    label03.setIcon(icon);
    label03.setBounds(204, 130, 46, 14);
    getContentPane().add(label03);
  }

  public void setText(String message) {
    label03.setText(message);
  }
}