java - 用于帧间按钮按下的 InternalFrameListener？

Question

我需要框架来更新并显示按钮被按下的次数(要更新的按钮文本) 如果我可以使用 actionPreformed() 锁定特定事件(按下按钮或按下菜单项)，那么我认为这应该有所帮助...

问题:

• 按下按钮时会创建更多帧

• 现有框架不会更新(无论如何我只希望有一个框架)

  import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;
  import javax.swing.event.*;
  
  public class ButtonFrame implements InternalFrameListener, ActionListener
  {
  
  JFrame myFrame = null;
  private int clicked;
  final String F=("Clicked: "+clicked+" Times!");
  
  public static void main(String[] a) 
  {
      (new ButtonFrame()).test();
  
  }
  
  private void test() 
  {
      myFrame = new JFrame("Internal Frame with a Button");
      myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      myFrame.setSize(400,400);
      myFrame.setContentPane(new JDesktopPane());
      JMenuBar Start_Bar = new JMenuBar();
      JMenu Start_Menu = new JMenu("Frame");
      JMenuItem Start_Item = new JMenuItem("Start");
      Start_Item.addActionListener(this);
      Start_Menu.add(Start_Item);
      Start_Bar.add(Start_Menu);
      myFrame.setJMenuBar(Start_Bar);
      myFrame.setVisible(true);
  
  }
  
  public void actionPerformed(ActionEvent Start_Item) 
  {
      JInternalFrame f = new JInternalFrame("Button Frame");
      f.setResizable(true);
      f.setClosable(false);
      f.setMaximizable(true);
      f.setIconifiable(true);
      f.setSize(200,200);
      f.setLocation(100,100);
      f.addInternalFrameListener(this);
      f.setVisible(true);
  
      Button objButton1;
      objButton1=new Button ("Clicked: "+clicked+" Times!");
      objButton1.setBounds(20,90,40,50);
      f.add(objButton1);
      objButton1.addActionListener(this);
  
      myFrame.getContentPane().add(f);
  }
  
  public void actionPreformed(ActionEvent objButton1)
  {
      clicked++;
  }
  
  public void internalFrameActivated(InternalFrameEvent e) 
  {
      System.out.println("Internal Button Ready");
  }
  public void internalFrameClosed(InternalFrameEvent e) 
  {
      System.out.println("Internal frame closed");
  }
  public void internalFrameClosing(InternalFrameEvent e) 
  {
      System.out.println("Internal frame closing");
  }
  public void internalFrameDeactivated(InternalFrameEvent e) 
  {
      System.out.println("Internal frame deactivated");
  }
  public void internalFrameDeiconified(InternalFrameEvent e) 
  { 
      System.out.println("Internal frame deiconified");
  }
  public void internalFrameIconified(InternalFrameEvent e) 
  {
      System.out.println("Internal frame iconified");
  }
  public void internalFrameOpened(InternalFrameEvent e) 
  {
      System.out.println("Internal frame opened");
  }
  }
  

Answer 1

根据您的描述，您的解决方案是尖叫隔离和代码责任分离，负责管理按钮的代码应该与管理框架和桌面 Pane 的代码分开

这样，您就可以使用单独的 ActionListener 并将功能隔离到按钮类的单个实例

import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JDesktopPane dp = new JDesktopPane();

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                JMenuBar Start_Bar = new JMenuBar();
                JMenu Start_Menu = new JMenu("Frame");
                JMenuItem Start_Item = new JMenuItem("Start");
                Start_Item.addActionListener(new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        JInternalFrame f = new JInternalFrame("Button", true, true, true, true);
                        f.setSize(200, 200);
                        f.setLocation(100, 100);
                        f.add(new ButtonPane());
                        f.setVisible(true);
                        dp.add(f);
                    }
                });
                Start_Menu.add(Start_Item);
                Start_Bar.add(Start_Menu);
                frame.setJMenuBar(Start_Bar);

                frame.add(dp);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class ButtonPane extends JPanel {

        private JButton button;
        private int count = 0;

        public ButtonPane() {
            setLayout(new GridBagLayout());
            button = new JButton("0");
            button.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    count++;
                    button.setText(Integer.toString(count));
                }
            });
            add(button);
        }

    }

}