在JList中选择一个项目时，我将如何编码? [英] How would I code when a item has been selected in a JList?

问题描述

我有一个带有5个选项的JList，当其中一个项目被选中或单击时，我希望它旁边的文本区域显示与单击的项目有关的一段文本.它应该对列表中的每个项目都执行此操作，但是我似乎找不到在API中执行该操作的方法

I have a JList with 5 options in it and when one of the items becomes selected or clicked i want the text area next to it to show a paragraph of text relative to the item clicked. It should do this for each item in the list but I cant seem to find how to do it in the API

我的程序如何知道JList中的一个项目是否被选中，以便我可以处理数据?

How would my program know if an item in the JList was selected so I can work with the data?

推荐答案

使用

Use addListSelectionListener. You can create a subclass (anonymous or not) of ListSelectionListener that does the work you want.

myList.addListSelectionListener(new ListSelectionListener()
{
  public void valueChanged(ListSelectionEvent ev)
  {
    // handle ev
  } 
});

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