Java redirected system output to jtext area, doesnt update until calculation is finished
- by user1806716
I have code that redirects system output to a jtext area, but that jtextarea doesnt update until the code is finished running. How do I modify the code to make the jtextarea update in real time during runtime?
private void updateTextArea(final String text) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
consoleTextAreaInner.append(text);
}
});
}
private void redirectSystemStreams() {
OutputStream out = new OutputStream() {
@Override
public void write(int b) throws IOException {
updateTextArea(String.valueOf((char) b));
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
updateTextArea(new String(b, off, len));
}
@Override
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
};
System.setOut(new PrintStream(out, true));
System.setErr(new PrintStream(out, true));
}
The rest of the code is mainly just an actionlistener for a button:
private void updateButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String shopRoot = this.shopRootDirTxtField.getText();
String updZipPath = this.updateZipTextField.getText();
this.mainUpdater = new ShopUpdater(new File(shopRoot), updZipPath);
this.mainUpdater.update();
}
That update() method begins the process of copying+pasting files on the file system and during that process uses system.out.println to provide an up-to-date status on where the program is currently at in reference to how many more files it has to copy.
