help on reading textfield on 1 class from another class and using it to create a file

[henry kay]

hi all,

i wish to read the text input by user on 1 class and use that textfield input in another class to create a file.

but currently , when i just click the menu item, it auto create the file out with the default text in the textfield.

i attached my code in below, tried to attached the file but unable to attach.
the one in bold are the 2 classes i trying to get the thing to work.

Any help is greatly appreciated.

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

public class Gui extends JFrame implements ActionListener, ItemListener
{
Container contentPanel = getContentPane();

JMenuBar menuBar,menuBar2,menuBar3,menuBar4,menuBar5,menuBa r6;
JMenu menu1,menu2,menu3,menu4,menu5,menu6;
JMenuItem menuItem,menuItem2,menuItem3,menuItem4,menuItem5,m enuItem6;
JPopupMenu popup;
String idText;
public JFrame frame,frame2,frame3,frame4,frame5,frame6;

public Gui()
{
frame = new JFrame("MDIS Student Regstration System");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E);
frame.setSize(400 , 200);
frame.setVisible(true);
frame.setResizable(false);
//frame.setLocationRelativeTo(null);

contentPanel = frame.getContentPane();
contentPanel.setLayout(new BorderLayout());
contentPanel.add(getHeader(), BorderLayout.NORTH);
//================================================== ===================================
//This section creates the menubar and menu items
menuBar = new JMenuBar();

//File Menu
menu1 = new JMenu("File");
menuItem = new JMenuItem("Quit");
menu1.add(menuItem);
menuBar.add(menu1);

//This exit the Gui when the quit button is clicked.
menuItem.addActionListener(new quitButton());
frame.setJMenuBar(menuBar);

//Student Menu
menu2 = new JMenu("Menu");
menuItem = new JMenuItem("Enroll a new student");
menu2.add(menuItem);

menuItem.addActionListener(new enrollNewStudent());

menuItem = new JMenuItem("Remove an existing tudent");
menu2.add(menuItem);

menuItem.addActionListener(new deleteStudent());

menuItem = new JMenuItem("Modify existing student information");
menu2.add(menuItem);

menuItem.addActionListener(new modifyStudent());

menuBar.add(menu2);
frame.setJMenuBar(menuBar);

//Search Menu
menu3 = new JMenu("Search");
menuItem = new JMenuItem("Search");
menu3.add(menuItem);
menuItem.addActionListener(new search());

menuBar.add(menu3);
frame.setJMenuBar(menuBar);

//Help Menu
menu4 = new JMenu("Help");
menuItem = new JMenuItem("About...");
menu4.add(menuItem);

menuItem = new JMenuItem("FAQ");
menu4.add(menuItem);

menuItem = new JMenuItem("Support");
menu4.add(menuItem);

menuItem = new JMenuItem("Getting Started");
menu4.add(menuItem);

menuBar.add(menu4);
frame.setJMenuBar(menuBar);

menuBar.setVisible(true);
}

//================================================== ===================================
//Main Method
public static void main (String [] args)
{
new Gui();
}
//================================================== ===================================

//================================================== ===================================
//This enables the title to be displayed in the north of the border
protected JComponent getHeader()
{
JLabel label = new JLabel("Student Registration System", JLabel.CENTER);
label.setFont(new Font("Courier", Font.BOLD, 16));
return label;
}
//================================================== ===================================

//================================================== ===================================
//This allow another layout (flow layout) to be put inside the border layout center
protected JComponent deleteStudent()
{
JPanel panel = new JPanel();
JLabel idLabel = new JLabel("Enter the id of the Student you wish to remove:");
JTextField idTextField = new JTextField(5);
JButton deleteButton = new JButton("Submit");
panel.setLayout(new FlowLayout());
panel.add(idLabel);
panel.add(idTextField);
panel.add(deleteButton);
return panel;
}
//================================================== ===================================

//================================================== ===================================
//This allow another layout (Gridbaglayout) to be put inside the border layout center
protected JComponent modifyStudent()
{
JPanel panel = new JPanel();
JLabel idLabel = new JLabel("Enter the id of the Student you wish to remove:");
JTextField idTextField = new JTextField(5);
JButton deleteButton = new JButton("Submit");
panel.setLayout(new FlowLayout());
panel.add(idLabel);
panel.add(idTextField);
panel.add(deleteButton);
return panel;
}
//================================================== ===================================

//================================================== ===================================
//This class quit the program
class quitButton implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);

}
}
//================================================== ===================================

//================================================== ===================================
//This class hide the pop up window for enroll new student
class hideEnrollFrame implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
frame2.setVisible(false);
}
}
//================================================== ===================================

//================================================== ===================================
//This class hide the pop up window for delete existing student
class hideDeleteFrame implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
frame3.setVisible(false);
}
}
//================================================== ===================================

//================================================== ===================================
//This class hide the pop up window for delete existing student
class hideModifyFrame implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
frame4.setVisible(false);
}
}
//================================================== ===================================

//================================================== ===================================
//This class hide the pop up window for delete existing student
class hideSearchFrame implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
frame5.setVisible(false);
}
}
//================================================== ===================================

//================================================== ===================================
//This class hide the pop up window for delete existing student
class hideSearchResult implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
frame6.setVisible(false);
}
}
//================================================== ===================================

//================================================== ===================================
//This class hide the pop up window for delete existing student
class searchResult implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
frame6 = new JFrame("MDIS Student Regstration System");
frame6.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
frame6.setSize(340 , 450);
frame6.setVisible(true);
frame6.setResizable(false);
frame6.setLocationRelativeTo(null);

contentPanel = frame6.getContentPane();
contentPanel.setLayout(new BorderLayout());


JPanel panel = new JPanel(new GridBagLayout());
frame6.getContentPane().add(panel, BorderLayout.NORTH);

//This section creates the menubar and menu items
menuBar6 = new JMenuBar();

//File Menu
menu6 = new JMenu("File");
menuItem6 = new JMenuItem("Quit");
menu6.add(menuItem6);
menuBar6.add(menu1);

//This exit the Gui when the quit button is clicked.
menuItem6.addActionListener(new hideSearchResult());
frame6.setJMenuBar(menuBar6);
}
}
//================================================== ===================================

//================================================== ===================================
//This class pop up a new window for enroll a new student
class enrollNewStudent implements ActionListener
{

public void actionPerformed (ActionEvent e)
{

frame2 = new JFrame("MDIS Student Regstration System");
frame2.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
frame2.setSize(340 , 450);
frame2.setVisible(true);
frame2.setResizable(false);
frame2.setLocationRelativeTo(null);

contentPanel = frame2.getContentPane();
contentPanel.setLayout(new BorderLayout());

JPanel panel = new JPanel(new GridBagLayout());
frame2.getContentPane().add(panel, BorderLayout.NORTH);
GridBagConstraints c = new GridBagConstraints();

JLabel id = new JLabel("Student ID(*)");
c.gridx = 0;
c.gridy = 0;
//c.weightx = 4;
//c.weighty = 4;
c.insets = new Insets(1,10,10,10);
c.fill = GridBagConstraints.BOTH;
panel.add(id, c);

JTextField idField = new JTextField(10);
idField.setText("Please enter NRIC for Id");
c.gridx = 0;
c.gridy = 1;
c.fill = GridBagConstraints.BOTH;
panel.add(idField, c);

JLabel name = new JLabel("Student Name(*)");
c.gridx = 0;
c.gridy = 2;
c.fill = GridBagConstraints.BOTH;
panel.add(name, c);

JTextField nameField = new JTextField(20);
nameField.setText("Please enter Student Name.");
c.gridx = 0;
c.gridy = 3;
c.fill = GridBagConstraints.BOTH;
panel.add(nameField, c);

JLabel courseBox = new JLabel("Select your desire course(*)");
c.gridx = 0;
c.gridy = 4;
c.fill = GridBagConstraints.BOTH;
panel.add(courseBox, c);

String [] courseList = {"Test 1" , "Test 2" , "Test 3"};
JComboBox course = new JComboBox(courseList);
course.setSelectedIndex(2);
c.gridx = 0;
c.gridy = 5;
panel.add(course, c);

JLabel code = new JLabel("Enter the Course Code(*)");
c.gridx = 0;
c.gridy = 6;
panel.add(code, c);

JTextField courseField = new JTextField(5);
courseField.setText("Please enter Course Code.");
c.gridx = 0;
c.gridy = 7;
c.fill = GridBagConstraints.BOTH;
panel.add(courseField, c);

JLabel stage = new JLabel("Select the Course Stages");
c.gridx = 0;
c.gridy = 8;
c.fill = GridBagConstraints.BOTH;
panel.add(stage, c);

String stage1 = "Stage 1";
String stage2 = "Stage 2";
String stage3 = "Stage 3";

JRadioButton stage1Button = new JRadioButton(stage1);
JRadioButton stage2Button = new JRadioButton(stage2);
JRadioButton stage3Button = new JRadioButton(stage3);

JPanel radioPanel = new JPanel(new FlowLayout());

ButtonGroup group = new ButtonGroup();
group.add(stage1Button);
group.add(stage2Button);
group.add(stage3Button);

radioPanel.add(stage1Button);
radioPanel.add(stage2Button);
radioPanel.add(stage3Button);

c.gridx = 0;
c.gridy = 9;
c.fill = GridBagConstraints.BOTH;
panel.add(radioPanel, c);

JButton submit = new JButton("Submit");
try
{
submit.addActionListener(new submitNewEnroll(idField.getText()));
}
catch (IOException ee)
{
}
JButton clear = new JButton("Clear");
JButton close = new JButton("Quit");

close.addActionListener(new hideEnrollFrame());

JPanel buttonPanel = new JPanel(new FlowLayout());

buttonPanel.add(submit);
buttonPanel.add(clear);
buttonPanel.add(close);

c.gridx = 0;
c.gridy = 10;
c.fill = GridBagConstraints.BOTH;
panel.add(buttonPanel, c);




//This section creates the menubar and menu items
menuBar2 = new JMenuBar();

//File Menu
menu2 = new JMenu("File");
menuItem2 = new JMenuItem("Quit");
menu2.add(menuItem2);
menuBar2.add(menu2);

//This exit the Gui when the quit button is clicked.
menuItem2.addActionListener(new hideEnrollFrame());
frame2.setJMenuBar(menuBar2);
}

}



//================================================== ===================================

//================================================== ===================================
//This class pop up a new window for delete a new student
class deleteStudent implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
frame3 = new JFrame("MDIS Student Regstration System");
frame3.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
frame3.setSize(600 , 200);
frame3.setVisible(true);
frame3.setResizable(false);
frame3.setLocationRelativeTo(null);

contentPanel = frame3.getContentPane();
contentPanel.setLayout(new BorderLayout());


JLabel label = new JLabel("Enter the ID or NRIC of the student you wish to remove. ");
JTextField idField = new JTextField(10);
JPanel deletePanel = new JPanel(new GridBagLayout());
JButton submit = new JButton("Submit");
JTextArea resultArea = new JTextArea();

frame3.getContentPane().add(deletePanel, BorderLayout.NORTH);

deletePanel.add(label);
deletePanel.add(idField);
deletePanel.add(submit);
deletePanel.add(resultArea);



//This section creates the menubar and menu items
menuBar3 = new JMenuBar();

//File Menu
menu3 = new JMenu("File");
menuItem3 = new JMenuItem("Quit");
menu3.add(menuItem3);
menuBar3.add(menu3);

//This exit the Gui when the quit button is clicked.
menuItem3.addActionListener(new hideDeleteFrame());
frame3.setJMenuBar(menuBar3);
}
}
//================================================== ===================================
//================================================== ===================================
//This class pop up a new window for modify student detail
class modifyStudent implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
frame4 = new JFrame("MDIS Student Regstration System");
frame4.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
frame4.setSize(340 , 450);
frame4.setVisible(true);
frame4.setResizable(false);
frame4.setLocationRelativeTo(null);

contentPanel = frame4.getContentPane();
contentPanel.setLayout(new BorderLayout());

JPanel panel = new JPanel(new GridBagLayout());
frame4.getContentPane().add(panel, BorderLayout.NORTH);
GridBagConstraints c = new GridBagConstraints();

JLabel id = new JLabel("Student ID");
c.gridx = 0;
c.gridy = 0;
c.insets = new Insets(1,5,5,5);
c.fill = GridBagConstraints.BOTH;
panel.add(id, c);

JTextField idField = new JTextField(10);
idField.setText("Please enter NRIC for Id");
c.gridx = 0;
c.gridy = 1;
c.fill = GridBagConstraints.BOTH;
panel.add(idField, c);

JLabel name = new JLabel("Student Name");
c.gridx = 0;
c.gridy = 2;
c.fill = GridBagConstraints.BOTH;
panel.add(name, c);

JTextField nameField = new JTextField(20);
nameField.setText("Please enter Student Name.");
c.gridx = 0;
c.gridy = 3;
c.fill = GridBagConstraints.BOTH;
panel.add(nameField, c);

JLabel courseBox = new JLabel("Select your desire course");
c.gridx = 0;
c.gridy = 4;
c.fill = GridBagConstraints.BOTH;
panel.add(courseBox, c);

String [] courseList = {"Test 1" , "Test 2" , "Test 3"};
JComboBox course = new JComboBox(courseList);
course.setSelectedIndex(2);
c.gridx = 0;
c.gridy = 5;
panel.add(course, c);

JLabel code = new JLabel("Enter the Course Code");
c.gridx = 0;
c.gridy = 6;
panel.add(code, c);

JTextField courseField = new JTextField(5);
courseField.setText("Please enter Course Code.");
c.gridx = 0;
c.gridy = 7;
c.fill = GridBagConstraints.BOTH;
panel.add(courseField, c);

JLabel stage = new JLabel("Select the Course Stages");
c.gridx = 0;
c.gridy = 8;
c.fill = GridBagConstraints.BOTH;
panel.add(stage, c);

String stage1 = "Stage 1";
String stage2 = "Stage 2";
String stage3 = "Stage 3";

JRadioButton stage1Button = new JRadioButton(stage1);
JRadioButton stage2Button = new JRadioButton(stage2);
JRadioButton stage3Button = new JRadioButton(stage3);

JPanel radioPanel = new JPanel(new FlowLayout());

ButtonGroup group = new ButtonGroup();
group.add(stage1Button);
group.add(stage2Button);
group.add(stage3Button);

radioPanel.add(stage1Button);
radioPanel.add(stage2Button);
radioPanel.add(stage3Button);

c.gridx = 0;
c.gridy = 9;
c.fill = GridBagConstraints.BOTH;
panel.add(radioPanel, c);

JButton submit = new JButton("Update");
JButton clear = new JButton("Clear");
JButton close = new JButton("Quit");

JPanel buttonPanel = new JPanel(new FlowLayout());

buttonPanel.add(submit);
buttonPanel.add(clear);
buttonPanel.add(close);

c.gridx = 0;
c.gridy = 10;
c.fill = GridBagConstraints.BOTH;
panel.add(buttonPanel, c);

JTextArea resultArea = new JTextArea();
resultArea.setPreferredSize(new Dimension(50,70));
c.gridx = 0;
c.gridy = 11;
c.fill = GridBagConstraints.BOTH;
panel.add(resultArea, c);

//This section creates the menubar and menu items
menuBar4 = new JMenuBar();

//File Menu
menu4 = new JMenu("File");
menuItem4 = new JMenuItem("Quit");
menu4.add(menuItem4);
menuBar4.add(menu4);

//This exit the Gui when the quit button is clicked.
menuItem4.addActionListener(new hideModifyFrame());
frame4.setJMenuBar(menuBar4);
}
}
//================================================== ===================================

//================================================== ===================================
//This class create the pop up frame for search
class search implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
frame5 = new JFrame("MDIS Student Regstration System");
frame5.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
frame5.setSize(600 , 350);
frame5.setVisible(true);
frame5.setResizable(false);
frame5.setLocationRelativeTo(null);



JPanel panel = new JPanel(new GridBagLayout());
frame5.getContentPane().add(panel, BorderLayout.NORTH);
GridBagConstraints c = new GridBagConstraints();

JLabel label = new JLabel("Enter Keyword to search:");
c.gridx = 0;
c.gridy = 0;
c.fill = GridBagConstraints.BOTH;
c.insets = new Insets(1,5,5,5);
panel.add(label, c);

JTextField searchField = new JTextField();
searchField.setPreferredSize(new Dimension(100,10));
c.gridx = 1;
c.gridy = 0;
c.fill = GridBagConstraints.BOTH;
c.insets = new Insets(1,5,5,5);
panel.add(searchField, c);

JButton submit = new JButton("Submit");
c.gridx = 2;
c.gridy = 0;
c.fill = GridBagConstraints.BOTH;
c.insets = new Insets(1,5,5,5);


submit.addActionListener(new searchResult());
panel.add(submit, c);


//This section creates the menubar and menu items
menuBar5 = new JMenuBar();

//File Menu
menu5 = new JMenu("File");
menuItem5 = new JMenuItem("Quit");
menu5.add(menuItem5);
menuBar5.add(menu5);

//This exit the Gui when the quit button is clicked.
menuItem5.addActionListener(new hideSearchFrame());
frame5.setJMenuBar(menuBar5);
}
}

//================================================== ===================================

//================================================== ===================================
//This class create a new file and saved the detail of the newly enrolled student
class submitNewEnroll implements ActionListener
{
public submitNewEnroll(String nn) throws IOException
{
File f = new File(nn +".txt");
f.createNewFile();
}

public void actionPerformed(ActionEvent e)
{

}

}




public void actionPerformed(ActionEvent e)
{
//...Get information from the item event...
//...Display it in the text area...
}

public void itemStateChanged(ItemEvent e)
{
//...Get information from the item event...
//...Display it in the text area...
}
}

EDIT my mw: Added code tags.

[marc weber]

Welcome to the Ranch!

I edited your post to use Code Tags. Unfortunately, your post didn't have indentation, so that wasn't preserved, but at least you have line numbers now. I didn't see any bold, so perhaps you can direct us to specific lines...?

(Posting code is helpful, but you're more likely to get useful responses if you keep your post brief and to the point. Perhaps there's some way to reduce your question to a general case?)

[Rob Spoor]

marc weber wrote:(Posting code is helpful, but you're more likely to get useful responses if you keep your post brief and to the point. Perhaps there's some way to reduce your question to a general case?)

Right. We prefer an SSCCE instead of almost 700 lines of code. To be honest, the length of code combined with the lack of indentation made me skip over it completely.

[Michael Dunn]

[See Ranch Office thread]

[henry kay]

marc, thanks for the aid to put it into a code tag whatever it means.

basically this is my assignment from my school which requires me to create an application for a student registration program.
i dun really know much of java swing programming so i put the code together using youtube, google and other source as my research source.

to be brief, the desire result is that i had a menu bar with menu item. when i click on the enroll new student menu item, it suppose to go to a pop up window which in this case i use a new frame . on the new window, there are some textfield that allow user to input data and then when i click submit, i wish to use the input from user to create a text file and then store the other textfield input in the text file.

what i facing now is that when i click on the menu item enroll new student, it create a text file with the text that i put as the default text without i clicking the submit button.


rob, what does SSCCE mean?


michael , i did post on multiple forum to get the maximum reply to my problem. how sure are you that it is not my code? if its not my code, why would i post code that is not working to get it working? it fine if you do not wish to help , but please to do not generalize people posting on multi forum asking for help. although i thank you for your input even though it is useless.

[Peter Taucher]

That's pretty awful code. Maybe you should consider reading a good book on java swing programming, or at least some of the useful tutorials out there:
http://java.sun.com/docs/books/tutorial/uiswing/
http://faq.javaranch.com/java/SwingFaq

There're several 'problems' in your code. The specific one you're asking for is located in your ActionListener implementation 'submitNewEnroll' (you should consider following the Naming Conventions).

When you instantiate the class and add it as ActionListener for the submit button, the textfield has the default content (preallocated). You create a file on construction time of 'submitNewEnroll' and do nothing on a button click (method actionPerformed() is empty). You should read the content of your textfield in your 'actionPerfomed()' method and also create the file there. That's the whole point of using an ActionListener ... do do something in the actionPerformed() method, don't you think?

[Rob Spoor]

henry kay wrote:rob, what does SSCCE mean?

Do you see these little dots below SSCCE? That means you can click on it and a new page opens that will explain what it means.

[Campbell Ritchie]

Afraid nobody will go through all that code to try and find the problem. The idea behind a school assignment is that you do the work, and ask for help on specific parts. [See Ranch Office thread]

You will need to read the link which appears against SSCCE ← like that, so you can work out what to post. You would do better to create a small example which reads the student's name from a JOptionPane (input dialog) and writes it to the file. Then you can add to it gradually. You should also not try to compile 700 lines of code all at once; you should run your application every time you add 7 lines of code; then you can see it working in parts.

[See Ranch Office thread]

[henry kay]

[See Ranch Office Thread]

[Michael Dunn]

[See Ranch Office thread.]

[Campbell Ritchie]

I think at this point, I shall be obliged to transfer this thread; I shall duplicate it to the Ranch Office forum, where discussion about posting in several places should continue, please.

[Campbell Ritchie]

I earlier wrote:I think at this point, I shall be obliged to transfer this thread; I shall duplicate it to the Ranch Office forum, where discussion about posting in several places should continue, please.

That thread is to be found here.

I shall edit this thread to remove discussion about multiple posts; that will remain unchanged in Ranch Office.

[Peter Taucher]

@Henry
Any comments on my remarks about your ActionListener? Did you even read it?