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Thread: Help with Java Application

  1. #1
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    Smile Help with Java Application

    hi, i have been given the task to create an address book in java using swing components. The address book will need to read in/out from a file, displaying, name, mobTel, homeTel & address. Other functions include searching through records, adding new data, and deleting entries. Here is my code so far. I am using a text editor and CMD. when i run the application the addresses in the file are read in using Buffereader & stored in the array list created, which works. However i am unsure how i would read each line of the file (as there are 4) into the GUI. I know it would involve a method of getting the text from the arraylist and storing it into the correct textfield. Any help would be greatly appreciated
    import java.lang.*;
    import java.util.*;
    import java.io.*;
    import java.net.*;
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
     
    public class address extends JFrame
    {
        JLabel lblhomeTel,lblmobileTel,lblName,lblAddress;
        JTextField txtAddress,txthomeTel, txtmobileTel,txtName;
        JPanel panel,panel2,panel3;
        JFrame frame;
        JButton buttonnew,buttondelete,buttonnext,buttonprevious,
        buttonFind;
        JMenu menuList;
        String arrayOfFile,fileInput,readline;
     
        public static void main(String[] argStrings)
        {
        	address GUI= new address();
            GUI.address();
     
        }
     
        	public void address ()
            	{
     
            	final ArrayList<String> arrayOfFile = new ArrayList<String>();
     
            try {           
                	BufferedReader fileStream = new BufferedReader(new FileReader("C://Users/Me/Documents/JavaProjects/Address/Src/contacts.txt"));
     
                	String fileInput = "";           
     
                	while ((fileInput = fileStream.readLine()) != null) 
     
                	{
                    	arrayOfFile.add(fileInput);
                	}
     
                	for (String readline : arrayOfFile) 
                	{
                    	System.out.println(readline);
    		}
     
                		fileStream.close();
            	}
            		catch (Exception ex) { System.out.println("Exception: " + ex.getMessage()); 
            	}
     
            		panel = new JPanel();
            		panel.setLayout(new GridLayout(2,1));
            		panel.setBackground(Color.LIGHT_GRAY);
     
                    	panel2 = new JPanel();
            		panel2.setBackground(Color.LIGHT_GRAY);
            		panel2.setLayout(new GridLayout(3,4,3,1));
     
            		panel3= new JPanel();
            		panel3.setBackground(Color.LIGHT_GRAY);
            		panel3.setLayout(new GridLayout(6,1));
     
            		frame=new JFrame();
            		frame.setTitle("Address Book");
            		frame.setSize(350,350);
            		frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
     
            		JMenuBar menuBar = new JMenuBar();
                    	JMenu menuList= new JMenu("File");
                    	menuBar.add(menuList);
                    	JMenuItem importFile=new JMenuItem("Import new Addresses");
                    	menuList.add(importFile);
                    	JMenuItem exitProg= new JMenuItem("Exit Program");
                    	menuList.add(exitProg);
                    	exitProg.addActionListener(new ActionListener() {
     
                           public void actionPerformed(ActionEvent event) 
                           {
                           System.exit(0);
             	       }
     
             		});
     
        			ArrayList<String> contacts = new ArrayList<String>();
     
                    	lblName= new JLabel("Name:");
                    	panel3.add(lblName);
     
                    	txtName= new JTextField("");
     
                    	panel3.add(txtName);
     
                    	lblhomeTel= new JLabel("Home Telephone:");
                    	panel3.add(lblhomeTel);
                    	txthomeTel= new JTextField("");
                    	panel3.add(txthomeTel);
     
            		lblmobileTel = new JLabel("Mobile Telephone:");
            		panel3.add(lblmobileTel);
                    	txtmobileTel = new JTextField("");
            		panel3.add(txtmobileTel);
     
                    	lblAddress= new JLabel("Address:");
                    	panel3.add(lblAddress);
                    	txtAddress= new JTextField("");
                    	panel3.add(txtAddress);
     
                            buttonnext= new JButton("<<");
                    	panel2.add(buttonnext);
     
                    	buttonprevious= new JButton(">>");
                    	panel2.add(buttonprevious);
     
                    	buttonnew= new JButton("Add Contact");
                    	panel2.add(buttonnew);
                    	buttonnew.addActionListener(new ActionListener() 
     
                    	{
                     	public void actionPerformed(ActionEvent event) 
                     	{
                           	txtName.getText();
                    	arrayOfFile.add(txtName.getText());
                            }});
     
                   		buttonFind= new JButton("Search Contact");
                    	panel2.add(buttonFind);
     
                    	buttondelete= new JButton("Delete Contact");
                    	panel2.add(buttondelete);
     
    			frame.setJMenuBar(menuBar);
    			panel.add(panel3);
    			panel.add(panel2);
    			frame.add(panel);
    			frame.setVisible(true);
    }
    }
    Last edited by helloworld922; November 19th, 2009 at 07:40 PM. Reason: Please use [code] tags!


  2. #2
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    Default Re: Help with Java Application

    If I understand correctly, one way would be rather than reading each line of the file into an ArrayList of Strings, create a new class (perhaps name it Contact?) that will hold the appropriate info, and parse each line of the file into a new object of class Contact (adding that to a List). You can then set the appropriate GUI display text based upon a user selection and fetching the data from the List.

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