[英]How do i add an action listener to a JList in a proper way?
I'm trying to add an actionListener to a JList, so whenever a user click a value in the JList , it will just println the value. 我正在尝试将actionListener添加到JList中,因此,每当用户单击JList中的值时,它都将println该值。
Here's the code 这是代码
public class FontProgram {
public static void main(String[] args) {
// TODO Auto-generated method stub
JFrame mainFrame = new JFrame("Fonts Frame");
JPanel panel = new JPanel(new BorderLayout());
GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fontNames = e.getAvailableFontFamilyNames();
JComboBox fontbox = new JComboBox(fontNames);
JList fontList = new JList(fontNames);
JButton button = new JButton("Submit");
JScrollPane scrollPane = new JScrollPane();
scrollPane.setViewportView(fontList);
fontList.addListSelectionListener(new SharedListSelectionHandler());
panel.add(fontbox, BorderLayout.NORTH);
panel.add(scrollPane, BorderLayout.CENTER);
panel.add(button, BorderLayout.SOUTH);
mainFrame.add(panel);
mainFrame.setVisible(true);
mainFrame.setSize(250, 250);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
Here's the result of the codes 这是代码的结果
So how do I add an action Listener to the JList? 那么如何将动作侦听器添加到JList?
I'm trying to add an actionListener to a JList,
我正在尝试将actionListener添加到JList中,
You can't, it doesn't have ActionListener
support 您不能,它没有
ActionListener
支持
so whenever a user click a value in the JList , it will just println the value.
因此,每当用户单击JList中的值时,它将只打印该值。
Use a ListSelectionListener
instead 改用
ListSelectionListener
Take a look at How to Use Lists and How to Write a List Selection Listener for more details 看一看如何使用列表和如何编写列表选择监听器以了解更多详细信息
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