如何在Java GUI中设置JTextArea的自动滚动？

Question

我已经在JScrollPane上嵌入了JTextArea，并且正在使用该JTextArea进行输出。

我希望每当输出超出JTextArea的大小时，JTextArea都会自动滚动，以便用户不必手动向下滚动即可查看最新输出。

我怎样才能做到这一点？

我已经将JTextArea和JScrollPane的autoscroll属性设置为true。

Answer 1

&nbsp;JScrollBar vbar = scrollPane.getVerticalScrollBar();&nbsp; &nbsp; for (int i = 0; i < 20; i++) {&nbsp; &nbsp; &nbsp; &nbsp; myJTxt.append("This is text " + i + "\n");&nbsp; &nbsp; &nbsp; &nbsp; vbar.setValue(vbar.getMaximum());&nbsp; &nbsp; &nbsp; &nbsp; vbar.paint(vbar.getGraphics());&nbsp; &nbsp; &nbsp; &nbsp; myJTxt.scrollRectToVisible(myJTxt.getVisibleRect());&nbsp; &nbsp; &nbsp; &nbsp; myJTxt.paint(myJTxt.getGraphics());&nbsp; &nbsp; &nbsp; &nbsp; try {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Thread.sleep(250);&nbsp; &nbsp; &nbsp; &nbsp; } catch (InterruptedException ex) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Logger.getLogger(ScrollTextView.class.getName()).log(Level.SEVERE, null, ex);&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }