刷新JFrame中的JList [英] Refresh JList in a JFrame

问题描述

我有一个显示来自矢量的信息的JList。然后，用户可以添加和删除此向量中的信息。当从Vector中添加/删除项目时，是否可以刷新JFrame中的JList？目前我正在做..

I've got a JList which displays information from a vector. The user can then add and remove information from this vector. Is it possible to refresh the JList inside my JFrame when items are added / removed from the Vector? Currently I'm doing..

 list = new JList(names);
 jframe.add(new JScrollPane(list), BorderLayout.CENTER);

但这不会将JList刷新为任何新内容。我检查，我的矢量内容等确实改变，但列表不刷新。为什么？我该如何解决？

but this doesn't refresh the JList to anything new. I've check and my vector contents etc. do change but the list isn't refreshing. Why? how can I fix it?

推荐答案

您不应该更新Vector。应该直接对ListModel进行更改，然后表将自动重新绘制。

You should not be updating the Vector. Changes should be made directly to the ListModel then the table will repaint itself automatically.

如果由于对Vector的更改而决定重新创建ListModel，那么您将更新通过执行以下操作：

If you decide to recreate the ListModel because of the changes to the Vector, then you update the list by doing:

list.setModel( theNewModel );

编辑：忘记Vector并将数据直接加载到DefaultListModel中：

Forget the Vector and load the data directly into the DefaultListModel:

DefaultListModel model = new DefaultListModel();
model.addElement( "one" );
model.addElement( "two" );
JList list = new JList( model );

现在，无论何时需要更改数据，都可以使用addElement（），removeElement直接更新模型（ ）或set（）方法。该列表将自动重新绘制。

Now whenever you need to change the data you update the model directly using the addElement(), removeElement() or set() methods. The list will automatically be repainted.

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