如何在不从另一个 class 创建新的 window 的情况下添加按钮

Question

也许我对这个概念的理解完全错误，但我正在尝试为按钮创建 classes 并在主 GUI class 中调用它们，以便它们出现在 window 上但我不完全知道如何将这些按钮 classes 调用到主 GUI class。

我目前通过简单地创建一个新对象来创建它们，但这会创建一个新的 window，而不是将其添加到我的主 GUI class 中当前存在的 window。我该如何解决这个问题，还是我这样做完全错了？

图形界面 class

            import java.awt.*;
            import java.awt.event.*;
            import javax.swing.*;

            class GUI extends Frame implements WindowListener
            {

                public GUI()
                {
                    super("GUI");

                    setLayout(new FlowLayout());
                    addWindowListener(this);


                }

                public void windowDeiconified(WindowEvent event){}
                public void windowIconified(WindowEvent event){} 
                public void windowActivated(WindowEvent event){} 
                public void windowDeactivated(WindowEvent event){}
                public void windowOpened(WindowEvent event){} 
                public void windowClosed(WindowEvent event)  {}
                public void windowClosing(WindowEvent e) { System.exit(0); }

                public static void main(String[] args)
                {
                    GUI screen = new GUI();

                    new Button1("TEST");

                    screen.setSize(500,100);
                    screen.setLocationRelativeTo(null);
                    screen.setVisible(true);
                }
            }

按钮 1 class

            import java.awt.*;
            import java.awt.event.*;

            public class Button1 extends GUI implements ActionListener {

                private Button addButton;

                public Button1(String s) {
                    addButton = new Button(s);
                    add(addButton);
                    addButton.addActionListener(this);
                    setVisible(true);
                    System.out.println("It atleast works here");
                }

                public void actionPerformed(ActionEvent e) {
                    System.out.println("It works - Button1");
                }

                public static void main(String[] args) {

                }
            }

Answer 1

首先：为什么你真的想为每个按钮创建新的类？第二：是的，我认为你没有完全正确。这段代码应该做你想做的。如果您不明白，请阅读或观看 Java 中有关面向对象编程的教程。

import java.awt.*;
        import java.awt.event.*;
        import javax.swing.*;

        class GUI extends Frame implements WindowListener
        {

            public GUI()
            {
                super("GUI");

                setLayout(new FlowLayout());
                addWindowListener(this);
            }

            public void windowDeiconified(WindowEvent event){}
            public void windowIconified(WindowEvent event){} 
            public void windowActivated(WindowEvent event){} 
            public void windowDeactivated(WindowEvent event){}
            public void windowOpened(WindowEvent event){} 
            public void windowClosed(WindowEvent event)  {}
            public void windowClosing(WindowEvent e) { System.exit(0); }

            public static void main(String[] args)
            {
                GUI screen = new GUI();

                screen.setSize(500,100);
                Button button1 = new Button("Button 1");
                button1.addActionListener(new ActionListener() {
                    System.out.println("It works - Button1");
                });
                screen.add(button1);
                screen.setLocationRelativeTo(null);
                screen.setVisible(true);
            }
        }

如何在不从另一个 class 创建新的 window 的情况下添加按钮

How to add a button without creating a new window from another class

java

awt

图形界面 class

按钮 1 class