Question

我的框架有问题。我认为我的问题是逻辑问题。我打开菜单框，然后当我点击添加乘客时，框架不会打开。我仍然可以看到前一帧。我使用在这个论坛上发布的想法将setVisisble改为（false），我想我会正确看到其他框架，但它不能正常工作。你能给我一些建议吗？谢谢

public class DriverProgram 
{ 
     public static void main (String [ ] argument) 
      { 
          Flight sw101 = new Flight(); 
          sw101.setVisible(true);
      } 
 } 

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

public class Flight extends JFrame
{
SeatingChart sc = new SeatingChart();
WaitingList wl = new WaitingList();
private String buttons[] = new String[5];
private final Font MENU_FONT = new Font("Serif", Font.BOLD, 20);
JButton b;
ActionListener listener1 = new MenuClickListener();
private JTextField input =null;  
private JTextField firstName;
private JTextField middleName;
private JTextField lastName; 
private final Font NEW_FONT = new Font("Serif", Font.BOLD + Font.ITALIC, 20);

public Flight()
{
    menu();
}

void menu( )
{ 
    uiFrameMenu();
    addPanelMenu();
}

void uiFrameMenu()
{
    setTitle( "MENU" );
    setSize( 400, 400 );
    setLocationRelativeTo( null );
    setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );   
}

void addPanelMenu()
{
    setLayout( new BorderLayout() ); 
    JPanel panel = new JPanel();
    panel.setLayout(new GridLayout (5,1));

    buttons[0] = "Add Passenger";
    buttons[1] = "Remove Passenger";
    buttons[2] = "Seating Chart";
    buttons[3] = "Waiting List";
    buttons[4] = "Exit";


    for( int i = 0; i < buttons.length ; i++ )
    {
        b = new JButton( buttons[i]);
        b.setText( buttons[i] );
        b.setForeground(Color.BLACK);
        b.setFont(MENU_FONT);
        b.addActionListener(listener1);
        panel.add(b);
    }

    getContentPane();
    panel.setBackground(Color.MAGENTA);
    add(panel,"Center");
}

class MenuClickListener implements ActionListener
{
    MenuClickListener() { }

    @Override
    public void actionPerformed( ActionEvent event ) 
    {   
        if ( event.getActionCommand().equals(buttons[0]))   
        { 
            addPassenger();
        }
        else if ( event.getActionCommand().equals(buttons[1]))  
        { 

        }
        setVisible(true);
             }
}



void addPassenger( )
{
    this.setEnabled(false);
    uiFrameData();
    setLayout( new BorderLayout() ); 
    JPanel panel1 = new JPanel();
    panel1.setLayout( new GridLayout(3, 2) );
    JPanel panel2 = new JPanel();
    panel2.setLayout( new GridLayout(3, 1) );
    JLabel l1 = new JLabel("First Name");
    JLabel l2 = new JLabel("Middle Name");
    JLabel l3 = new JLabel("Last Name");
    firstName = new JTextField();
    middleName = new JTextField();
    lastName = new JTextField();
    panel1.add(l1);
    panel1.add(firstName);
    panel1.add(l2);
    panel1.add(middleName);
    panel1.add(l3);
    panel1.add(lastName);
    add(panel1);
}

void uiFrameData()
{
    setTitle( "FIRST, MIDDLE AND LAST NAME" );
    setSize( 400, 400 );
    //setLocationRelativeTo( null );
    setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );   
}
}

Answer 1

对于这种情况，最好应用CardLayout，正如已经告诉过的那样。在这里，我修改了您的代码，您每次都在Layout设置JFrame，因为它与您设置的Layout相同，为什么不这样做一次。为什么每次都无缘无故地添加额外的代码:-)，在动态更改GUI后revalidate() repaint()上JFrame和//import corejava.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class DriverProgram { public static void main (String [ ] argument) { SwingUtilities.invokeLater(new Runnable() { public void run() { Flight sw101 = new Flight(); sw101.setVisible(true); } }); } } class Flight extends JFrame { //SeatingChart sc = new SeatingChart(); //WaitingList wl = new WaitingList(); private String buttons[] = new String[5]; private final Font MENU_FONT = new Font("Serif", Font.BOLD, 20); JButton b; ActionListener listener1 = new MenuClickListener(); private JPanel panel; // changed this to instance field so it can be accessed, at button click. private JTextField input =null; private JTextField firstName; private JTextField middleName; private JTextField lastName; private final Font NEW_FONT = new Font("Serif", Font.BOLD + Font.ITALIC, 20); public Flight() { menu(); } void menu( ) { uiFrameMenu(); addPanelMenu(); } void uiFrameMenu() { setTitle( "MENU" ); setSize( 400, 400 ); setLocationRelativeTo( null ); setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } void addPanelMenu() { setLayout( new BorderLayout() ); panel = new JPanel(); panel.setLayout(new GridLayout (5,1)); buttons[0] = "Add Passenger"; buttons[1] = "Remove Passenger"; buttons[2] = "Seating Chart"; buttons[3] = "Waiting List"; buttons[4] = "Exit"; for( int i = 0; i < buttons.length ; i++ ) { b = new JButton( buttons[i]); b.setText( buttons[i] ); b.setForeground(Color.BLACK); b.setFont(MENU_FONT); b.addActionListener(listener1); panel.add(b); } getContentPane(); panel.setBackground(Color.MAGENTA); add(panel,"Center"); } class MenuClickListener implements ActionListener { MenuClickListener() { } @Override public void actionPerformed( ActionEvent event ) { if ( event.getActionCommand().equals(buttons[0])) { addPassenger(); } else if ( event.getActionCommand().equals(buttons[1])) { } } } void addPassenger( ) { //this.setEnabled(false); remove(panel); uiFrameData(); JPanel panel1 = new JPanel(); panel1.setLayout( new GridLayout(3, 2) ); JPanel panel2 = new JPanel(); panel2.setLayout( new GridLayout(3, 1) ); JLabel l1 = new JLabel("First Name"); JLabel l2 = new JLabel("Middle Name"); JLabel l3 = new JLabel("Last Name"); firstName = new JTextField(); middleName = new JTextField(); lastName = new JTextField(); panel1.add(l1); panel1.add(firstName); panel1.add(l2); panel1.add(middleName); panel1.add(l3); panel1.add(lastName); add(panel1); revalidate(); // If your JDK is 1.7 else use getContentPane().revalidate(); for JDK 1.6 or below repaint(); } void uiFrameData() { setTitle( "FIRST, MIDDLE AND LAST NAME" ); setSize( 400, 400 ); } }，以便它们可以回复到观众。在这里，我对代码进行了一些更改。

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无法关闭前一帧以查看新的帧java

1 个答案: