Java单击按钮打开一个新窗口

Question

我坐在电脑前大约13个小时,我觉得我的眼睛正在流血.我发现了一个我称之为GuiGenie的小编辑.它非常适合用按钮和所有好东西创建窗口.问题是我想在我的第一个菜单中单击一个按钮,然后打开我制作的其他菜单.我刚开始编程4周前,所以我是一个完整的菜鸟.我有一种感觉,因为主要的方法弄乱了,但我不知道和13个小时坐在这里尝试数百万的东西让我发疯:)这是我到目前为止

 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);
}
}

按下按钮时,我希望它打开这个新窗口

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);
}
}

如果有人可以帮助我会非常感激!! 我很尊重你的职业选手,因为如果你是这方面的职业选手,你可能比99.9%的世界更聪明.这东西伤害了我的大脑.

Answer 1

这是你可以做的事情,对于这种情况,你有多个Forms or Windows你可以做的是使用一个JPanel可以设置这个CardLayoutLayoutManager,然后你可以添加两个JPanels并使用由提供的方法访问它们相同.

使用setBounds()时不要使用Absolute Positioning这实际上不是将组件放入父容器的正确方法.而是使用setLocation(...)和setSize(...)方法.考虑不要尽可能多地使用绝对定位.从Java Docs获得的前一行支持的某些行如下:

虽然可以不使用布局管理器,但是如果可能的话,应该使用布局管理器.布局管理器可以更轻松地调整依赖于外观的组件外观,不同的字体大小,容器的大小变化以及不同的区域设置.布局管理器也可以被其他容器以及其他程序轻松地重用.

因为你的程序输出在任何意义上都不是一种舒缓的体验.Atleast LayoutManager可以使您的工作更加轻松,因为您无需为每个组件指定位置和大小.尝试浏览布局管理器教程,并尽快习惯它们.他们是真正的生活储蓄者:-)

这是一个修改后的代码 SOURCE CODE

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);       
    }
}

Answer 2

这是myPanel类的代码,使用这个:

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);
}
}