Question

我需要更新框架并显示按下按钮的次数（按钮的文本要更新）如果我可以使用actionPreformed（）来锁定特定事件（按下按钮，或按下菜单项），那么我认为这应该有帮助......

问题：

按下按钮时会创建更多帧

现有的框架没有更新（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窗格的代码分开

这样，您可以使用单独的ActionListener以及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);
        }

    }

}

用于帧间按钮按下的InternalFrameListener？

1 个答案: