java - 按下 JList 元素时弹出窗口 - Java

Question

我的代码有一个小问题，我想实现什么:

1. 当我单击 JList 项时，它应该会弹出一个窗口，提供一条消息。
2. 弹出窗口应具体引用我点击的元素，例如我按汽车，它应该类似于“您点击的车辆是汽车”

我到目前为止编写的代码:

  import java.awt.FlowLayout;
  import java.awt.event.MouseAdapter;
  import java.awt.event.MouseEvent;
  import java.awt.event.MouseListener;

 import javax.swing.JFrame;
  javax.swing.JList;
 import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
  import javax.swing.ListSelectionModel;

      public class Test extends JFrame {
private JList list;
private static String[] names = { "car ", "bike", "skate" };

public Test() {
    super("title");
    setLayout(new FlowLayout());
    setSize(650, 800);

    list = new JList(names);
    list.setVisibleRowCount(3);
    list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    add(new JScrollPane(list));
    setVisible(true);
    MouseListener mouseListener = new MouseAdapter() {
        public void mouseisClicked(MouseEvent mouseEvent) {
            if (mouseEvent.getClickCount() == 2) {
                JOptionPane.showMessageDialog(null, "testing");
            }
        }
    };
    setVisible(true);
}

public static void main(String agrs[]) {
    Test t1 = new Test();
}
}

Answer 1

您可以使用MouseEvent来获取生成该事件的组件:

JList list = (JList)mouseEvent.getSource();
System.out.println(list.getSelectedValue().toString());

编辑:

public void mouseisClicked(MouseEvent mouseEvent) {

您没有实现正确的方法。应该是:

@Override
public void mouseClicked(MouseEvent mouseEvent) {

当您重写方法时，请始终使用 @Override 以防止出现输入错误。