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I have been trying to make a text changed event handling mechanism for my JTextArea. For my purposes an event has to be fired whenever there is a change in the text of the JTextArea. I tried using the KeyListener interface and here is my code for that.
txtArea.addKeyListener(new KeyListener() { @Override public void keyTyped(KeyEvent arg0) { } @Override public void keyReleased(KeyEvent arg0) { // TODO Auto-generated method stub } @Override public void keyPressed(KeyEvent arg0) { currentText = text.getText(); if (currentText == textString) JOptionPane.showMessageDialog(null, "Correct"); } }); Nothing happened when the textarea's text matched the hardcoded text. How can an event changed event be made for this.
Can this objective be achieved with a PropertyChangedListener? If it can, then how?
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Use textArea. append("text") , but I recomend JTextPane for more control like color, selection, etc.
Using the read(Reader in, Object desc) method inherited from the JTextComponent allow us to populate a JTextArea with text content from a file. This example will show you how to do it. In this example we use an InputStreamReader to read a file from our application resource.
JTextArea0. selectAll(); JTextArea0. replaceSelection(""); This selects the entire textArea and then replaces it will a null string, effectively clearing the JTextArea.
It has built in support for HTML. No how. Look for another component.
I would get the JTextArea's Document via getDocument() (a PlainDocument actually) and use a DocumentListener to listen for changes. This way you'd capture changes from key strokes and also from copy/paste/cut events.
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