Java通过单击按钮打开一个新窗口

我在电脑前坐了13个小时，我觉得我的眼睛在流血。 我找到了一个我喜欢的小gui编辑器，叫做GuiGenie。 它非常适合创建带有按钮的窗口和所有这些好东西。 问题是我想在我的第一个菜单中点击一个按钮，然后让它打开我制作的另一个菜单。 我4周前才开始编程，所以我是个十足的傻瓜。 我有一种感觉，因为主要的方法，它搞砸了，但我不知道，13个小时坐在这里尝试数以百万计的事情让我发疯：） 这是我到目前为止得到的

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

public class MyPanel extends JPanel {
private JTextField How;
private JLabel jcomp2;
private JLabel jcomp3;
private JButton jcomp4;

public MyPanel() {
    //construct components
    How = new JTextField (1);
    jcomp2 = new JLabel ("How long were you parked?");
    jcomp3 = new JLabel ("Minutes");
    jcomp4 = new JButton ("openNewWindow");

    //adjust size and set layout
    setPreferredSize (new Dimension (315, 85));
    setLayout (null);

    //add components
    add (How);
    add (jcomp2);
    add (jcomp3);
    add (jcomp4);

    //set component bounds (only needed by Absolute Positioning)
    How.setBounds (245, 50, 60, 25);
    jcomp2.setBounds (35, 30, 185, 50);
    jcomp3.setBounds (250, 30, 60, 20);
    jcomp4.setBounds (0, 0, 315, 25);

       jcomp4.addActionListener( new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {

        }
    });
}


public static void main (String[] args) {
    JFrame frame = new JFrame ("MyPanel");
    frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add (new MyPanel());
    frame.pack();
    frame.setVisible (true);
}
}

当按下按钮时，我想让它打开这个新窗口

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

public class MyPanel2 extends JPanel {
private JButton jcomp1;
private JButton jcomp2;
private JButton jcomp3;
private JTextField jcomp4;

public MyPanel2() {
    //construct components
    jcomp1 = new JButton ("test1");
    jcomp2 = new JButton ("test2");
    jcomp3 = new JButton ("test3");
    jcomp4 = new JTextField (5);

    //adjust size and set layout
    setPreferredSize (new Dimension (395, 156));
    setLayout (null);

    //add components
    add (jcomp1);
    add (jcomp2);
    add (jcomp3);
    add (jcomp4);

    //set component bounds (only needed by Absolute Positioning)
    jcomp1.setBounds (20, 45, 100, 25);
    jcomp2.setBounds (135, 60, 100, 25);
    jcomp3.setBounds (260, 35, 100, 25);
    jcomp4.setBounds (105, 115, 100, 25);
}


public static void main (String[] args) {
    JFrame frame = new JFrame ("MyPanel");
    frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add (new MyPanel2());
    frame.pack();
    frame.setVisible (true);
}
}

如果有人能帮忙，我将不胜感激！！ 我非常尊重你的专业人士，因为如果你是这方面的专业人士，你可能比世界上99.9%的人更聪明。

---

这东西伤了我的大脑。

这是myPanel类的代码，用这个：

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

 import javax.swing.*;
import javax.swing.event.*;

public class MyPanel extends JPanel {
private JTextField How;
private JLabel jcomp2;
private JLabel jcomp3;
private JButton jcomp4;

public MyPanel() {
    //construct components
    How = new JTextField (1);
    jcomp2 = new JLabel ("How long were you parked?");
    jcomp3 = new JLabel ("Minutes");
    jcomp4 = new JButton ("openNewWindow");

    jcomp4.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            JFrame frame = new JFrame ("MyPanel");
            frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
            frame.getContentPane().add (new MyPanel2());
            frame.pack();
            frame.setVisible (true);

        }
    });

    //adjust size and set layout
    setPreferredSize (new Dimension (315, 85));
    setLayout (null);

    //add components
    add (How);
    add (jcomp2);
    add (jcomp3);
    add (jcomp4);

    //set component bounds (only needed by Absolute Positioning)
    How.setBounds (245, 50, 60, 25);
    jcomp2.setBounds (35, 30, 185, 50);
    jcomp3.setBounds (250, 30, 60, 20);
    jcomp4.setBounds (0, 0, 315, 25);

       jcomp4.addActionListener( new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {

        }
    });
}


public static void main (String[] args) {
    JFrame frame = new JFrame ("MyPanel");
    frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add (new MyPanel());
    frame.pack();
    frame.setVisible (true);
}
}

---

在这种情况下，您可以使用多个

窗体或窗口

，您可以使用

JPanel

，将此设置为

LayoutManager

，然后您可以将两个

JPanel

添加到其中，并使用其提供的方法访问它们

使用绝对定位时不要使用

setBounds（）

，这确实不是将组件放置到父容器的正确方法。取而代之的是使用和方法。考虑不要尽可能地使用绝对定位。支持前面从Java文档中提取的行的某些行如下所示：

虽然可以不使用布局管理器，但应该使用 布局管理器，如果可能的话。布局管理器可以更轻松地 调整到外观和感觉相关的零部件外观，以不同 字体大小、容器不断变化的大小以及不同的地区。 布局管理器也可以被其他容器以及 其他项目

因为你的程序的输出在任何意义上都不是一种安慰的体验。至少LayoutManager可以使这项工作更加容易，因为您不必为每个组件指定位置和大小。试着穿过走廊，尽快习惯它们。他们是真正的救命恩人：-）

这是一段从您的

源代码

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

public class CardLayoutExample
{
    private JPanel contentPane;
    private MyPanel panel1;
    private MyPanel2 panel2;

    private void displayGUI()
    {
        JFrame frame = new JFrame("Card Layout Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel contentPane = new JPanel();
        contentPane.setBorder(
            BorderFactory.createEmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new CardLayout());
        panel1 = new MyPanel(contentPane);
        panel2 = new MyPanel2();
        contentPane.add(panel1, "Panel 1"); 
        contentPane.add(panel2, "Panel 2");
        frame.setContentPane(contentPane);
        frame.pack();   
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String... args)
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                new CardLayoutExample().displayGUI();
            }
        });
    }
}

class MyPanel extends JPanel {

    private JTextField How;
    private JLabel jcomp2;
    private JLabel jcomp3;
    private JButton jcomp4;
    private JPanel contentPane;

    public MyPanel(JPanel panel) {

        contentPane = panel;
        //construct components
        How = new JTextField (1);
        jcomp2 = new JLabel ("How long were you parked?");
        jcomp3 = new JLabel ("Minutes");
        jcomp4 = new JButton ("openNewWindow");

        //adjust size and set layout
        setPreferredSize (new Dimension (315, 85));
        setLayout (null);

        //set component bounds (only needed by Absolute Positioning)
        How.setBounds (245, 50, 60, 25);
        jcomp2.setBounds (35, 30, 185, 50);
        jcomp3.setBounds (250, 30, 60, 20);
        jcomp4.setLocation(0, 0);
        jcomp4.setSize(315, 25);
        jcomp4.addActionListener( new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                CardLayout cardLayout = (CardLayout) contentPane.getLayout();
                cardLayout.next(contentPane);
            }
        });

        //add components
        add (How);
        add (jcomp2);
        add (jcomp3);
        add (jcomp4);               
    }
}

class MyPanel2 extends JPanel {
    private JButton jcomp1;
    private JButton jcomp2;
    private JButton jcomp3;
    private JTextField jcomp4;

    public MyPanel2() {
        //construct components
        jcomp1 = new JButton ("test1");
        jcomp2 = new JButton ("test2");
        jcomp3 = new JButton ("test3");
        jcomp4 = new JTextField (5);

        //adjust size and set layout
        setPreferredSize (new Dimension (395, 156));
        setLayout (null);

        //set component bounds (only needed by Absolute Positioning)
        jcomp1.setBounds (20, 45, 100, 25);
        jcomp2.setBounds (135, 60, 100, 25);
        jcomp3.setBounds (260, 35, 100, 25);
        jcomp4.setBounds (105, 115, 100, 25);

        //add components
        add (jcomp1);
        add (jcomp2);
        add (jcomp3);
        add (jcomp4);       
    }
}

---

停止尝试随意的事情，休息一下，睡个好觉，然后阅读Swing教程：。要理解JPanel必须包含在JDialog的JFrame中才能显示在新窗口中，并且在应用程序中只能有一个main方法。您不需要两个。这是一个有用的示例，但您应该引导OP远离使用

null

layout.：-）Swing GUI对象应仅在上构造和操作。