CODEWITHSUNDEEP
javaswingjtextareakeylistener
Robin Singh
Robin Singh

Reputation: 3

Output on keyPressed in JTextArea

When I am trying to get text from JTextArea and print it, it is printing the string after the next key is pressed I want to print it when I press the key.

The code is given below:

textArea_1.addKeyListener(new KeyAdapter() {
        @Override
        public void keyPressed(KeyEvent e) {
            x=textArea_1.getText().toString();
            System.out.println(x);
        }

        @Override
        public void keyReleased(KeyEvent e) {
        }

        @Override
        public void keyTyped(KeyEvent e) {
        }
    });

For example First I pressed 's' key then I pressed 'a' key The output after pressing 'a' key is s The output after pressing 's' key is null But I want s just after i pressed 's' key

Upvotes: 0

Views: 103

Answers (1)

DevilsHnd - 退した
DevilsHnd - 退した

Reputation: 9192

As already mentioned in comments, you can use a DocumentListener, for example:

javax.swing.event.DocumentListener myDocumentListener = new javax.swing.event.DocumentListener() {
    @Override
    public void changedUpdate(javax.swing.event.DocumentEvent documentEvent) {
        output(documentEvent);
    }
    @Override
    public void insertUpdate(javax.swing.event.DocumentEvent documentEvent) {
        output(documentEvent);
    }
    @Override
    public void removeUpdate(javax.swing.event.DocumentEvent documentEvent) {
        output(documentEvent);
    }
    private void output(javax.swing.event.DocumentEvent documentEvent) {
        Document source = documentEvent.getDocument();
        int length = source.getLength();
        try {
            System.out.println(source.getText(0, length));
        }
        catch (javax.swing.text.BadLocationException ex) {
            System.err.println("Invalid Index Supplied!");
        }
    }
};
jTextArea1.getDocument().addDocumentListener(myDocumentListener);

Upvotes: 3

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