java - 单击 Jbutton 时，按钮会移动或标签文本会更改。我只想同时执行这两个操作

Question

import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class JavaGUI extends JPanel {

    private Control control = new Control();
    private Keys keys = new Keys("Original starting value.");

    public JavaGUI() {
        this.setLayout(new GridLayout(0, 1));
        this.add(keys);
        this.add(control);

        private class Control extends JPanel {

            public Control() {
                this.add(new JButton(new AbstractAction("Update") {

                    @Override
                    public void actionPerformed(ActionEvent e) {
                        System.out.println("Command: " + e.getActionCommand());
                        keys.string = String.valueOf(System.nanoTime());
                        //keys.label.setText(keys.string);  //remove comments cause button move
                        JButton j = (JButton) e.getSource();
                        j.setLocation(j.getX() + 10, j.getY() + 10);
                    }
                }));
            }
        }


        private class Keys extends JPanel {

            private String string;
            private JLabel label = new JLabel();

            public Keys(String s) {
                this.string = s;
                label.setText(s);
                this.add(label);
            }
        }


        private void display() {
            JFrame f = new JFrame("JavaGUI");
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            f.add(this);
            f.pack();
            f.setLocationRelativeTo(null);
            f.setVisible(true);
        }

        public static void main(String[] args) {
            EventQueue.invokeLater(new Runnable() {

                @Override
                public void run() {
                    new JavaGUI().display();
                }
            });
        }
    }

Answer 1

您正在使用 GridLayout，因此您不能随机移动组件。我建议您阅读 Laying Out Components Within a Container 上的 Swing 教程了解布局管理的工作原理。