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javaswingbackspace

Processing backspace in Java Swing

I have Java Swing code that process user's input as follows:

public class UserEntryPane extends JPanel implements DocumentListener {

…

@Override
public void insertUpdate(DocumentEvent e) {
    try {
        String c = a.getText(...);
        if (c.equals("\n")) {
            System.out.println(...);
            ...
        } 
        else {
            ...
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

The issue is that this method is not invoked when Backspace is pressed. How can I detect user's Backspace to process it correctly?

Solution

  • Seems you use DocumentListener.

    Look at method removeUpdate. It called, when you use backspace.

        @Override
    public void removeUpdate(DocumentEvent arg0) {
    }