Won't Display

[Chase Becicka]

I have been trying to figure out why when I execute this code all I get is a little bar at the top of the screen without any of my Labels or Buttons please help with a debug



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

public class inventFrame extends JFrame
{
public void BankingGUIFrame()
{
setTitle("Teller Program");
Toolkit tk = Toolkit.getDefaultToolkit();
Dimension d = tk.getScreenSize();
int height = 200;
int width = 267;
setBounds((d.width-width)/2, (d.height-height)/2, width, height);
setResizable(true);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
Container contentPane = getContentPane();
JPanel panel = new BankingGUIPanel();
contentPane.add(panel);
}


public static void main(String[] args)
{
JFrame frame = new inventFrame();
frame.show();
}
}


class BankingGUIPanel extends JPanel implements ActionListener
{
private JTextField custNumTF, custNameFTF, custNameMITF, custNameLTF;
private JLabel custNumL, custNameFL, custNameMIL, custNameLL;
private JButton exitButton;


public BankingGUIPanel()
{
JPanel displayPanel = new JPanel();
displayPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));

custNumL = new JLabel("Customer Number: ");
custNameFL = new JLabel("First Name: ");
custNameMIL = new JLabel("Middle Inital: ");
custNameLL = new JLabel("Last Name: ");

custNumTF = new JTextField(10);
custNameFTF = new JTextField(10);
custNameMITF = new JTextField(10);
custNameLTF = new JTextField(10);

displayPanel.add(custNumL);
displayPanel.add(custNumTF);
displayPanel.add(custNameFL);
displayPanel.add(custNameFTF);
displayPanel.add(custNameMIL);
displayPanel.add(custNameMITF);
displayPanel.add(custNameLL);
displayPanel.add(custNameLTF);

JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
exitButton = new JButton("Exit");
buttonPanel.add(exitButton);

exitButton.addActionListener(this);

setLayout(new BorderLayout());
add(displayPanel, BorderLayout.CENTER);
add(buttonPanel, BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e)
{
Object source = e.getSource();

if (source == exitButton)
System.exit(0);

}



}

[Ransika deSilva]

Hi,
I figured out why it is not appearing. You have to change the main method.

  public static void main(String[] args) {
        inventFrame frame = new inventFrame();
        frame.show();
        frame.BankingGUIFrame();
    }  

BankingGUIFrame() is a method and it is not a constructor, so it will not be automatically created when you create an object of the class inventFrame. To call that you need an instance of the class inventFrame, you can't have Frame frame = new inventFrame(); and use that frame instance to call the BankingGUIFrame() cause that reference can't call that method.
Hope you got the point. BTW, it's better you name the classes according to the Hungerian Notation (the 1st letter of all the words should be in capital, example: InventFrame), Have a nice day...

[Chase Becicka]

Okay I can see my JFrame now but I can't see my panels I created unless I resize my JFrame but I don't want my JFrame to be resizeable in the end. Should I just switch to a easier Layout Manager or is there an easy fix

what I am trying to get this to do is go gown vertically like this

Label TF
Label TF
Label TF

ect.


Heres the cod eupdated again

 import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.*;
 
public class inventFrame extends JFrame
{
public void BankingGUIFrame()
{
setTitle("Teller Program");
Toolkit tk = Toolkit.getDefaultToolkit();
Dimension d = tk.getScreenSize();
int height = 500;
int width = 450;
setBounds((d.width-width)/2, (d.height-height)/2, width, height);
setResizable(false);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
Container contentPane = getContentPane();
JPanel panel = new BankingGUIPanel();
contentPane.add(panel);
} 
 

public static void main(String[] args) 
{        
inventFrame frame = new inventFrame();        
frame.show();        
frame.BankingGUIFrame();    
}  
}
 

class BankingGUIPanel extends JPanel implements ActionListener
{
private JTextField custNumTF, custNameFTF, custNameMITF, custNameLTF;
private JLabel custNumL, custNameFL, custNameMIL, custNameLL;
private JButton exitButton;
 

public BankingGUIPanel()
{
JPanel displayPanel = new JPanel();
displayPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
 
custNumL = new JLabel("Customer Number: ");
custNameFL = new JLabel("First Name: ");
custNameMIL = new JLabel("Middle Inital: ");
custNameLL = new JLabel("Last Name: ");
 
custNumTF = new JTextField(10);
custNameFTF = new JTextField(10);
custNameMITF = new JTextField(10);
custNameLTF = new JTextField(10);
 
displayPanel.add(custNumL);
displayPanel.add(custNumTF);
displayPanel.add(custNameFL);
displayPanel.add(custNameFTF);
displayPanel.add(custNameMIL);
displayPanel.add(custNameMITF);
displayPanel.add(custNameLL);
displayPanel.add(custNameLTF);
 
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
exitButton = new JButton("Exit");
buttonPanel.add(exitButton);
 
exitButton.addActionListener(this);
 
setLayout(new BorderLayout());
add(displayPanel, BorderLayout.CENTER);
add(buttonPanel, BorderLayout.SOUTH);
}
 

public void actionPerformed(ActionEvent e)
{
Object source = e.getSource();
 
if (source == exitButton)
System.exit(0);
 
}
 

 
}  

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.*;
 
public class Banking extends JFrame
{
    public Banking()
    {
        setTitle("Teller Program");
        Toolkit tk = Toolkit.getDefaultToolkit();
        Dimension d = tk.getScreenSize();
        int height = 500;
        int width = 450;
        setBounds((d.width-width)/2, (d.height-height)/2, width, height);
//        setResizable(false);
        addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(0);
            }
        });
        Container contentPane = getContentPane();
        JPanel panel = new BankingGUIPanel();
        contentPane.add(panel);
        setVisible(true);
    } 
 
    public static void main(String[] args) 
    { 
        new Banking(); 
    } 
}
 
class BankingGUIPanel extends JPanel implements ActionListener
{
    private JTextField custNumTF, custNameFTF, custNameMITF, custNameLTF;
    private JLabel custNumL, custNameFL, custNameMIL, custNameLL;
    private JButton exitButton;
 
    public BankingGUIPanel()
    {
        custNumL = new JLabel("Customer Number: ");
        custNameFL = new JLabel("First Name: ");
        custNameMIL = new JLabel("Middle Inital: ");
        custNameLL = new JLabel("Last Name: ");
 
        custNumTF = new JTextField(10);
        custNameFTF = new JTextField(10);
        custNameMITF = new JTextField(10);
        custNameLTF = new JTextField(10);
 
        JPanel displayPanel = new JPanel();
        displayPanel.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(5,2,5,2);    // spacing around components
        gbc.weightx = 1.0;                   // allows horiz dispersion
        // an option to allow components to fill the vertical space
        //gbc.weighty = 1.0;                   // allows vertical dispersion
 
        addComponents(custNumL,    custNumTF,    displayPanel, gbc);
        addComponents(custNameFL,  custNameFTF,  displayPanel, gbc);
        addComponents(custNameMIL, custNameMITF, displayPanel, gbc);
        addComponents(custNameLL,  custNameLTF,  displayPanel, gbc);
        // or instead, let components remain clumped together and then
        // push everything up by setting [I]weighty[/I] to non–zero
        // and adding an empty component, like this
        gbc.weighty = 1.0;
        displayPanel.add(new JLabel(), gbc);
 
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
        exitButton = new JButton("Exit");
        buttonPanel.add(exitButton);
 
        exitButton.addActionListener(this);
 
        setLayout(new BorderLayout());
        add(displayPanel, BorderLayout.CENTER);
        add(buttonPanel, BorderLayout.SOUTH);
    }
 
    private void addComponents(JLabel label, JTextField tf, JPanel panel,
                               GridBagConstraints gbc)
    {
        gbc.anchor = gbc.EAST;             // align right
        gbc.gridwidth = gbc.RELATIVE;      // next to last component in row
        panel.add(label, gbc);
        gbc.anchor = gbc.WEST;             // align left
        gbc.gridwidth = gbc.REMAINDER;     // last component in row
        panel.add(tf, gbc);
    }
 
    public void actionPerformed(ActionEvent e)
    {
        Object source = e.getSource();
 
        if (source == exitButton)
            System.exit(0);
    }
}