Java Swing - Using JScrollPane and Having it scroll back to top

Question

Calling setCaretPosition(0) on your text component will cause it to scroll to the top.

Just in case you are not using a text component take a look at the thread posted here.... Setting Scroll Bar on a JScrollPane

Their solution is to spin off a thread via invokeLater

final JScrollPane scroll = new JScrollPane(text);
javax.swing.SwingUtilities.invokeLater(new Runnable() {
   public void run() { 
       scroll.getVerticalScrollBar().setValue(0);
   }
});

This will make the work:

DefaultCaret caret = (DefaultCaret) textArea.getCaret();
caret.setUpdatePolicy(DefaultCaret.NEVER_UPDATE);

You can use the method setCaretPosition(0) just after setText(String t) of your text component.

Use JComponent.scrollRectToVisible()

If you need more info, here's an article