Java-设置jScrollBar的位置 [英] Java - Setting position of jScrollBar

问题描述

我在JScrollPane中有一个JTable，该表偶尔会获取新的数据行.最终，数据行的数量超过了一次显示的数量，因此ScrollPane启动了.我希望每次添加新数据时，滚动窗格"都跳到底部(达到最大值)，所以我这样写，即在添加新行后立即调用:

I have a JTable in a JScrollPane, and the table gets new rows of data every once in a while. Eventually there are more rows of data than can be displayed at once and so the ScrollPane kicks in. I want the Scroll Pane to jump to the bottom (to its maximum value) every time new data is added, so I wrote this, which is called right after the new row is added:

jScrollPane1.getVerticalScrollBar().setValue(jScrollPane1.getVerticalScrollBar().getMaximum());

它工作得很好，但是有一个问题-它没有滚动到完整的底部.它始终会遗漏表格的一行，您需要手动向下滚动才能到达整个底部.

It works quite well, but there is a problem- It doesn't scroll to the complete bottom. It always leaves out one row of the table that you need to manually scroll down to reach the complete bottom.

我怀疑只有在方法结束后才以某种方式添加新的数据行(按下JButton并激活actionPerformed方法后将其激活).

My suspicion is that the new row of data is somehow added only after the method is over (it is activated after pressing a JButton and activating an actionPerformed kind of method).

该如何解决?

推荐答案

您需要使用SwingUtilities.invokeLater在当前处理事件结束时将其排队. 看起来像这样:

you need to queue it at the end of current processing events using SwingUtilities.invokeLater; it would look like this:

SwingUtilities.invokeLater(new Runnable() {
  public void run() {
   jScrollPane1.getVerticalScrollBar().setValue(jScrollPane1.getVerticalScrollBar().getMaximum());
  }
 }
);

否则将在当前事件期间运行，并且将在任何实际更新之前发生.

otherwise will run during the current event and will happen before any actual update.

记住将它们设置为final，以将其传递给匿名内部类

remember to make them variable final to pass them into an anonymous inner class

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