Question

我需要将JOptionPaneMessageDialog置于e.getSource的父元素中。问题是我有两个不同的类。一个侦听器类和另一个使用该侦听器的类这是我需要改变的界限

JOptionPane.showMessageDialog((Component)e.getSource(), "pulsado");

    package excepciones;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JOptionPane;

    class ButtonListener  implements ActionListener{

        @Override
        public void actionPerformed(ActionEvent e) {

            JOptionPane.showMessageDialog((Component)e.getSource(), "pulsado");
        }

    }

    public class UseActionListener {
      public static void main(String[] args) {
          JFrame frame = new JFrame("Popup JComboBox");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            JButton source = new JButton("Ring the bell!");
            source.addActionListener(new ButtonListener());
            frame.add(source, BorderLayout.SOUTH);

            source.addActionListener(new ButtonListener());

            frame.setSize(300, 200);
            frame.setVisible(true);
      }
    }

Answer 1

JOptionPane.showMessageDialog(((Component) e.getSource()).getParent(), "pulsado");

Answer 2

您是否尝试通过setLocation(x, y)方法设置位置？查看How to set the location of “JOptionPane.showMessageDialog”

在生成事件的源元素的父元素中居中JoptionPaneMessageDialog

2 个答案: