1 question regarding textfield

**henry** · 06-15-2010, 04:18 PM

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.

Java Code:

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,menuBar6;
	JMenu menu1,menu2,menu3,menu4,menu5,menu6;
	JMenuItem menuItem,menuItem2,menuItem3,menuItem4,menuItem5,menuItem6;
	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_CLOSE);
        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
	[B]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);
		}
		
	}[/B]
	
	
	
//=====================================================================================

//=====================================================================================
//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
	[B]class submitNewEnroll implements ActionListener
	{
		public submitNewEnroll(String nn) throws IOException 
		{
			File f = new File(nn +".txt");
			f.createNewFile();
		}
		
		public void actionPerformed(ActionEvent e)
		{
			
		}
		
	}
[/B]

	
	
	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...
   		}
}

Moderator Edit: Code tags added

**Norm** · 06-15-2010, 04:49 PM

Too much code. can you reduce it to a small program?
Also please code tags.

use that textfield input in another class to create a file

Does the textfield have the name of the file or what is to be written to the file?

it auto create the file out with the default text in the textfield

What does this mean? It creates the file before the user has change the data in the textfield?

**Webuser** · 06-16-2010, 03:47 AM

emm

place your code into code tags first

I think you should use getText() method with your JTextField :)

String text=jTextFieldn.getText()

next you just use text var

**Fubarable** · 06-16-2010, 03:56 AM

Hello, and welcome to the forum. I hope you don't mind that I edited your code and added code tags which should help make your posted code retain its formatting and be more readable.

To do this yourself, highlight your pasted code (please be sure that it is already formatted when you paste it into the forum; the code tags don't magically format unformatted code) and then press the code button, and your code will have tags.

Another way to do this is to manually place the tags into your code by placing the tag [code] above your pasted code and the tag [/code] below your pasted code like so:

Java Code:

[cod&#101;]
  // your code goes here
  // notice how the top and bottom tags are different
[/cod&#101;]

Best of luck, and again, welcome!

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