用动作监听器打开另一个类

嗨，我正在处理一个程序，但我需要能够通过点击菜单选项卡来更改类（以便更改框架）。用动作监听器打开另一个类

我希望有人来修改这个让我到class2.java

JMenu area = new JMenu ("Area"); 
    menu.add(area); 
    JMenuItem convertA= new JMenuItem ("Convertions"); 
    area.add(convertA); 

    class aaction implements ActionListener{ 
     public void actionPerformed (ActionEvent e) { 


     } 
    }

类1.java

/*import needed packages*/ 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JTextArea; 
import javax.swing.JButton; 
import javax.swing.JTextPane; 
import javax.swing.JTextField; 
import javax.swing.JFormattedTextField; 
import javax.swing.AbstractAction; 
import javax.swing.SwingConstants; 
import javax.swing.Action; 
import javax.swing.InputVerifier; 
import javax.swing.*; 
import javax.xml.soap.Text; 

import java.awt.BorderLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.*; 
import java.awt.Font; 
import java.awt.Frame; 
import java.math.*; 
import java.lang.*; 
import java.text.*; 
import java.awt.EventQueue; 
import java.awt.SystemColor; 
import java.awt.Window; 
import java.awt.Canvas; 
import java.awt.Color; 
import java.awt.Component; 
import java.awt.Container; 
import java.awt.Cursor; 
@SuppressWarnings("unused") 
public class circle_ac { 

private JFrame frame; 
private JTextField txtRadius; 
private JTextField txtTheAreaOf; 
private JTextField txtTheCircumfrenceOf; 

/** 
* Launch the application. 
*/ 
public static void main(String[] args) { 
    EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      try { 
       circle_ac window = new circle_ac(); 
       window.frame.setVisible(true); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
    }); 
} 

/** 
* Create the application. 
*/ 
public circle_ac() { 
    initialize(); 
} 

/** 
* Initialize the contents of the frame. 
* @param arg0 
* @param arg0 
* @param arg0 
*/ 
private void initialize() { 
    /*setup the JFrame*/ 
    frame = new JFrame(); 
    frame.setResizable(true); 
    frame.setBounds(1000, 1000, 2250, 1000); 
    frame.pack(); 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    frame.setLayout(new BorderLayout());   
    frame.add(BorderLayout.CENTER,new JLabel("MHMB 1.3.5")); 

    /*setup JMenu*/ 
    Font f = new Font("sans-serif", Font.PLAIN, 25); 
    UIManager.put("Menu.font", f); 
    UIManager.put("MenuItem.font", f); 

    JMenuBar menu = new JMenuBar(); 
    frame.setJMenuBar(menu); 

    JMenu circles = new JMenu ("Circles"); 
    menu.add(circles); 
    JMenuItem ac= new JMenuItem("Area And Circumference"); 
    circles.add(ac); 

    JMenu measurements = new JMenu ("Measurements"); 
    menu.add(measurements); 
    JMenuItem convert= new JMenuItem ("Convertions"); 
    measurements.add(convert); 

    JMenu area = new JMenu ("Area"); 
    menu.add(area); 
    JMenuItem convertA= new JMenuItem ("Convertions"); 
    area.add(convertA); 

    class aaction implements ActionListener{ 
     public void actionPerformed (ActionEvent e) { 
      contentPane.removeAll(); 
      contentPane.setLayout(new BorderLayout()); 
      contentPane.add(BorderLayout.CENTER,frame1); 
      this.revalidate(); 
      this.repaint(); 
     } 
    } 

    JMenu close = new JMenu ("Close"); 
    menu.add(close); 
    JMenuItem exit = new JMenuItem ("Exit"); 
    close.add(exit); 

    class eaction implements ActionListener{ 
     public void actionPerformed (ActionEvent e) { 
      System.exit(0); 
     } 
    } 
    exit.addActionListener(new eaction()); 

    /*setup calculate button*/ 
    JButton btnCalculate = new JButton("calculate"); 
    btnCalculate.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent arg0) { 

    /*setup calculations*/ 
      double rad; 
      double ans1; 
      double ans2; 
      double pi=3.1415926535897932384626433832795; 
      try { 
       rad=Double.parseDouble(txtRadius.getText()) ; 
       ans1= pi*(rad*rad); 
       ans2= 2*pi*rad; 
       DecimalFormat df = new DecimalFormat("#"); 
       df.setMaximumFractionDigits(25); 

       txtTheAreaOf.setText("The Area Is "+df.format(ans1)); 

       txtTheCircumfrenceOf.setText("The Circumference Is "+df.format(ans2)); 

    /*setup error message*/ 
       }catch(Exception e){ 
        JOptionPane.showMessageDialog(null, "Please Enter Valid Radius"); 
       } 
      } 
    }); 

    /*initialize calculate button*/ 
    btnCalculate.setFont(new Font("Tahoma", Font.PLAIN, 60)); 
    btnCalculate.setBackground(new Color(227, 227, 227)); 
    btnCalculate.setForeground(Color.BLACK); 
    frame.getContentPane().add(btnCalculate, BorderLayout.SOUTH); 

    /*setup Radius text box*/ 
    txtRadius = new JTextField(); 
    txtRadius.setFont(new Font("Tahoma", Font.PLAIN, 55)); 
    txtRadius.setCursor(null); 
    txtRadius.setInputVerifier(null); 
    txtRadius.setText(" Enter The Radius"); 
    txtRadius.setBackground(SystemColor.controlHighlight); 
    frame.getContentPane().add(txtRadius, BorderLayout.CENTER); 
    txtRadius.setColumns(10); 

    /*setup Area text box*/ 
    txtTheAreaOf = new JTextField(); 
    txtTheAreaOf.setEditable(false); 
    txtTheAreaOf.setText("The Area Of The Circle Is               "); 
    txtTheAreaOf.setBackground(SystemColor.control); 
    txtTheAreaOf.setFont(new Font("Tahoma", Font.PLAIN, 30)); 
    frame.getContentPane().add(txtTheAreaOf, BorderLayout.WEST); 

    /*setup Circumference text box*/ 
    txtTheCircumfrenceOf =new JTextField(); 
    txtTheAreaOf.setEditable(false); 
    txtTheCircumfrenceOf.setFont(new Font("Tahoma", Font.PLAIN, 30)); 
    txtTheCircumfrenceOf.setText("The Circumfrence Of The Circle Is             "); 
    txtTheCircumfrenceOf.setBackground(SystemColor.control); 
    frame.getContentPane().add((Component) txtTheCircumfrenceOf, BorderLayout.EAST); 
} 
}

class2.java

/*import needed packages*/ 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JTextArea; 
import javax.swing.JButton; 
import javax.swing.JTextPane; 
import javax.swing.JTextField; 
import javax.swing.JFormattedTextField; 
import javax.swing.AbstractAction; 
import javax.swing.SwingConstants; 
import javax.swing.Action; 
import javax.swing.InputVerifier; 
import javax.swing.*; 
import javax.xml.soap.Text; 

import java.awt.BorderLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.*; 
import java.awt.Font; 
import java.awt.Frame; 
import java.math.*; 
import java.lang.*; 
import java.text.*; 
import java.awt.EventQueue; 
import java.awt.SystemColor; 
import java.awt.Window; 
import java.awt.Canvas; 
import java.awt.Color; 
import java.awt.Component; 
import java.awt.Container; 
import java.awt.Cursor; 
@SuppressWarnings("unused") 
public class area_c { 

private JFrame frame1; 
private JTextField txtRadius; 
private JTextField txtTheAreaOf; 
private JTextField txtTheCircumfrenceOf; 

/** 
* Launch the application. 
*/ 
public static void main(String[] args) { 
    EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      try { 
       area_c window = new area_c(); 
       window.frame1.setVisible(true); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
    }); 
} 

/** 
* Create the application. 
*/ 
public area_c() { 
    initialize(); 
} 

/** 
* Initialize the contents of the frame. 
* @param arg0 
* @param arg0 
* @param arg0 
*/ 
private void initialize() { 
    /*setup the JFrame*/ 
    frame1 = new JFrame(); 
    frame1.setResizable(true); 
    frame1.setBounds(1000, 1000, 2250, 1000); 
    frame1.pack(); 
    frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    frame1.setLayout(new BorderLayout());   
    frame1.add(BorderLayout.CENTER,new JLabel("MHMB 1.3.5")); 

    /*setup JMenu*/ 
    Font f = new Font("sans-serif", Font.PLAIN, 25); 
    UIManager.put("Menu.font", f); 
    UIManager.put("MenuItem.font", f); 

    JMenuBar menu = new JMenuBar(); 
    frame1.setJMenuBar(menu); 

    JMenu circles = new JMenu ("Circles"); 
    menu.add(circles); 
    JMenuItem ac= new JMenuItem("Area And Circumference"); 
    circles.add(ac); 

    JMenu measurements = new JMenu ("Measurements"); 
    menu.add(measurements); 
    JMenuItem convert= new JMenuItem ("Convertions"); 
    measurements.add(convert); 

    JMenu area = new JMenu ("Area"); 
    menu.add(area); 
    JMenuItem convertA= new JMenuItem ("Convertions"); 
    area.add(convertA); 

    class aaction implements ActionListener{ 
     public void actionPerformed (ActionEvent e) { 

     } 
    } 

    JMenu close = new JMenu ("Close"); 
    menu.add(close); 
    JMenuItem exit = new JMenuItem ("Exit"); 
    close.add(exit); 

    class eaction implements ActionListener{ 
     public void actionPerformed (ActionEvent e) { 
      System.exit(0); 
     } 
    } 
    exit.addActionListener(new eaction()); 

System.out.println("Hello World!");

我需要的菜单选项卡将其从class1.java更改为具有动作侦听器的class2.java。这可能是，如果是这样，我该怎么做。

来源

2017-08-07 AT games

举例：HTTPS：//www.javatpoint.com/java-jtabbedpane –

在大多数IDE的，在设计（GUI）面板上的按钮，当您单击鼠标右键，你可以穿越：

活动 - >操作 - >的actionPerformed（）。

当你处于一个框架，你可以设置它的可见性关闭隐藏它，就像这样：

this.setVisible(false);

您可以创建要重定向另一个类的对象（其他框架）并将其设置为可见性以显示它，如下所示：

area_c of = new area_c(); 
of.setVisible(true);

因此，您将从一个类切换到另一个不同的帧。

可以使用的JMenuItem对象的对象达到相同的：

 class1 = new JPanel(); 
     class1.setLayout(new BorderLayout());   
     class1.add(BorderLayout.CENTER,new JLabel("Label_Name"));     
     class2 = new JPanel(); 
     class2.setLayout(new BorderLayout());   
     class2.add(BorderLayout.CENTER,new JLabel("Label_Name")); 
     JMenuItem JMenuItemObject1 =new JMenuItem("Class 1"); 
     JMenuItem JMenuItemObject2 =new JMenuItem("Class 2"); 


     JMenuItemObject1.addActionListener(new ActionListener() {    
     public void actionPerformed(ActionEvent e) { 
      contentPane.removeAll(); 
      contentPane.setLayout(new BorderLayout()); 
      contentPane.add(BorderLayout.CENTER,panel1); 
      this.revalidate(); 
      this.repaint(); 
     } 
     }); 
     JMenuItemObject2.addActionListener(new ActionListener() {    
     public void actionPerformed(ActionEvent e) { 
      contentPane.removeAll(); 
      contentPane.setLayout(new BorderLayout()); 
      contentPane.add(BorderLayout.CENTER,panel2); 
      this.revalidate(); 
      this.repaint(); 
     } 
     }); 

     area.add(JMenuItemObject1);   
     area.add(JMenuItemObject2);   
     menubar.add(area);

来源

2017-08-07 08:27:27

将与一个动作监听 –

这项工作是。处理ActionEvent的类应该实现这个接口。该类的对象必须注册一个组件。该对象可以使用addActionListener（）方法进行注册。当动作事件发生时，调用该对象的actionPerformed方法。 –

@ATgames我根据您的要求做了必要的修改。 –

我建议您实现两个班作为JPanels。然后，您可以将这些JPanel添加到您的JFrame中。看看这个小例子，它以简短快速的方式显示了原理。希望它能帮助：

package test; 

import java.awt.BorderLayout; 
import java.awt.Container; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JMenu; 
import javax.swing.JMenuBar; 
import javax.swing.JMenuItem; 
import javax.swing.JPanel; 

public class TestFrame extends JFrame { 

    private Container contentPane; 
    private JPanel panel1,panel2; 
    public TestFrame() { 
     super("Test"); 
     this.setJMenuBar(menubar()); 
     this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     contentPane = this.getContentPane(); 
     createPanels(); 
     contentPane.setLayout(new BorderLayout()); 
     this.add(BorderLayout.CENTER,panel1); 
     this.pack(); 
     this.setVisible(true); 

    } 

    private JMenuBar menubar() { 
     JMenuBar menubar = new JMenuBar(); 
     JMenu fileMenu = new JMenu("File"); 
     JMenuItem m1 =new JMenuItem("Selection 1"); 
     JMenuItem m2 =new JMenuItem("Selection 2"); 

     m1.addActionListener(new ActionListener() {    
      public void actionPerformed(ActionEvent e) { 
       contentPane.removeAll(); 
       contentPane.setLayout(new BorderLayout()); 
       contentPane.add(BorderLayout.CENTER,panel1); 
       refresh(); 
      } 
     }); 

     m2.addActionListener(new ActionListener() {    
      public void actionPerformed(ActionEvent e) { 
       contentPane.removeAll(); 
       contentPane.setLayout(new BorderLayout()); 
       contentPane.add(BorderLayout.CENTER,panel2); 
       refresh(); 
      } 
     }); 
     fileMenu.add(m1);   
     fileMenu.add(m2); 
     menubar.add(fileMenu);   

     return menubar; 
    } 

    private void refresh() { 
     this.revalidate(); 
     this.repaint();   
    } 

    private void createPanels() { 
     panel1 = new JPanel(); 
     panel1.setLayout(new BorderLayout());   
     panel1.add(BorderLayout.CENTER,new JLabel("Hello  World"));     
     panel2 = new JPanel(); 
     panel2.setLayout(new BorderLayout());   
     panel2.add(BorderLayout.CENTER,new JLabel("Goodbye World"));   

    } 

    public static void main(String[] args) { 
     TestFrame t = new TestFrame(); 
    } 
}

来源

2017-08-07 08:58:02

用动作监听器打开另一个类

回答

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