UpdDelBirthdayForm.java

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

@SuppressWarnings("all")
public class UpdDelBirthdayForm extends JFrame implements ActionListener, ItemListener
{
	private JTextField txt_Entryid,txt_Name,txt_Year;
	private JComboBox cho_Day,cho_Month,cho_Contact;
 	private JButton cmd_Update,cmd_Delete,cmd_Cancel;
 	Vector v=new Vector();
 	Vector v2=new Vector();
 	Vector c=new Vector();
 
 	private static String [] Months={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};

	private static String[] Days={"1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31"};
	int confirm=0;	
 	public UpdDelBirthdayForm(String fname)
 	{
 	super(fname);
 	txt_Entryid=new JTextField(5);
 	txt_Name=new JTextField(15);
 	txt_Year=new JTextField(5);

 	cmd_Update=new JButton("Update");
 	cmd_Delete=new JButton("Delete");
 	cmd_Cancel=new JButton("Back");

 	for(int i=0;i<12;i++)
 	{
			v.addElement(Months[i]);
		}
		
		//Add values in month combobox.
 	cho_Month=new JComboBox(v);

 	for(int i=0;i<31;i++)
 	{
			v2.addElement(Days[i]);
		}
		
		//Add values in day combobox.
		cho_Day=new JComboBox(v2);
 	
		//Gets the Entryid+Name entries in vector c.
		c=getList();

		//Initialize cho_Contact combobox with vector c.
	 cho_Contact=new JComboBox(c);
	 
	 //If vector c has atleast 1 entry.
		if(c.size()>0)
		{
			cho_Contact.setSelectedIndex(0);
			try
			{
				BufferedReader br=new BufferedReader(new FileReader("Birthday"));
				String str=new String();
				str=br.readLine();
				StringTokenizer token=new StringTokenizer(str,"*");
				txt_Entryid.setText(token.nextToken());
				txt_Name.setText(token.nextToken());
				cho_Day.setSelectedItem(token.nextToken());
				cho_Month.setSelectedItem(token.nextToken());
				txt_Year.setText(token.nextToken());
				br.close();
				
			} catch(FileNotFoundException fnfe)
			 {
				 displayMesg("Birthday file not found");
					 
			 }
			 catch(IOException ioe)
			 {
				 displayMesg("I/O error");
				 
			 }
		}
		else
		{
			displayMesg("No record found");
			cho_Contact.setEnabled(false);
			cmd_Update.setEnabled(false);
			cmd_Delete.setEnabled(false);
			cho_Day.setEnabled(false);
			cho_Month.setEnabled(false);
			txt_Entryid.setEnabled(false);
			txt_Name.setEnabled(false);
			txt_Year.setEnabled(false);
		}


		JPanel mainpanel=new JPanel();
		JPanel panel1=new JPanel();
		JPanel panel2=new JPanel();
		JPanel panel3=new JPanel();
		JPanel panel4=new JPanel();
		JPanel panel5=new JPanel();
		JPanel panel6=new JPanel();
		
		getContentPane().setLayout(new BorderLayout());
		
		panel1.setLayout(new BorderLayout());
		panel2.setLayout(new FlowLayout());
		panel2.add(new JLabel("B. R. Enterprises"));
		panel3.setLayout(new FlowLayout());
		panel3.add(new JLabel("Update Delete Birthday Form"));
		panel1.add(panel2,BorderLayout.NORTH);
		panel1.add(panel3,BorderLayout.CENTER);
		panel4.setLayout(new GridLayout(3,2));
		panel4.add(new JLabel("Select Contact"));
		panel4.add(cho_Contact);
		panel4.add(new JLabel("Entry ID : "));
		panel4.add(txt_Entryid);
		panel4.add(new JLabel("Name : "));
		panel4.add(txt_Name);
		panel5.setLayout(new FlowLayout(FlowLayout.LEFT));
		panel5.add(new JLabel("Select Date of Birthday : "));
		panel5.add(new JLabel("Day "));
		panel5.add(cho_Day);
		panel5.add(new JLabel("Month "));
		panel5.add(cho_Month);
		panel5.add(new JLabel("Year "));
		panel5.add(txt_Year);
		panel6.setLayout(new FlowLayout());
		panel6.add(cmd_Update);
		panel6.add(cmd_Delete);
		panel6.add(cmd_Cancel);
		mainpanel.setLayout(new GridLayout(3,1,5,5));
		mainpanel.add(panel1);
		mainpanel.add(panel4);
		mainpanel.add(panel5);
		getContentPane().add(mainpanel,BorderLayout.CENTER);
		getContentPane().add(panel6,BorderLayout.SOUTH);
		pack();
		txt_Entryid.setEnabled(false);
		txt_Name.setEnabled(false);

 	cmd_Update.addActionListener(this);
 	cmd_Delete.addActionListener(this);
 	cmd_Cancel.addActionListener(this);
 	cho_Contact.addItemListener(this);
 	addWindowListener(new MyWindowAdapter());

	}

 	public void actionPerformed(ActionEvent ae)
 	{
	 	//If user clicks on Update button.
 	if(ae.getSource()==cmd_Update)
 	{
			try
			{
	 		BufferedReader br=new BufferedReader(new FileReader("Birthday"));
	 		BufferedWriter bw=new BufferedWriter(new FileWriter("tempfile"));
	 		String str=new String();
	 		while((str=br.readLine())!=null)
	 		{
		 		StringTokenizer token=new StringTokenizer(str,"*");
		 		String eid=txt_Entryid.getText();
		 		String name=txt_Name.getText();
		 		String e=token.nextToken();
		 		String n=token.nextToken();

		 		//If file entry matches with the cho_Contact selected entry then
		 		//write record to new record to the tempfile.
		 		if(eid.equals(e) && name.equals(n))
		 		{
			 		String s=txt_Entryid.getText().trim()+"*"+txt_Name.getText().trim()+"*"+(String)cho_Day.getSelectedItem()+"*"+(String)cho_Month.getSelectedItem()+"*"+txt_Year.getText().trim();
		 			bw.write(s+"\n");
		 		}
		 		
		 		//If file entry does not matches with the cho_Contact selected entry then
		 		//write the record read from the Annivers file.
		 		else
		 		{
			 		bw.write(str+"\n");
		 		}
	 		}
	 		br.close();
	 		bw.close();
 		 if(checkValues()==true)
				{
 				updateFile();
				}
 		 
 		} catch(FileNotFoundException fnfe)
 		 {
	 		 displayMesg("Birthday file not found");
	 		 dispose();
	 		 return;
	 		 
	 	 }
	 	 catch(IOException ioe)
	 	 {
		
		 	 displayMesg("I/O error");
		 	 return;
		 	 
	 	 }

	 }
	 
	 //If user clicks on Delete button.
 	else if(ae.getSource()==cmd_Delete)
 	{
	 
			try
			{
	 		BufferedReader br=new BufferedReader(new FileReader("Birthday"));
	 		BufferedWriter bw=new BufferedWriter(new FileWriter("tempfile"));
	 		String str=null;
	 		while((str=br.readLine())!=null)
	 		{
		 		
		 		StringTokenizer token=new StringTokenizer(str,"*");
		 		String eid=txt_Entryid.getText();
		 		String name=txt_Name.getText();
		 		String e=token.nextToken();
		 		String n=token.nextToken();

		 		//If file entry does not matches with the cho_Contact selected entry then
		 		//write record to new record to the tempfile.
		 		if((eid.equals(e) && name.equals(n))==false)
		 		{
			 		bw.write(str+"\n");
		 		}
	 		}
	 		br.close();
	 		bw.close();
 		 confirm=JOptionPane.showConfirmDialog(this,"Do You Want To delete This Record","Delete Confirm Dialog",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);
 		 if (confirm==0)
 		 {
					updateFile();
		 		cho_Contact.removeItem(cho_Contact.getSelectedItem());//Remove the deleted item from cho_Contact combobox.
					displayMesg("Record deleted");
				} 		
				else if(confirm ==1) 
				{
					displayMesg("Record Is Not deleted");
				}
 		} catch(FileNotFoundException fnfe)
 		 {
	 
	 		 displayMesg("Birthday file not found");
	 	 }
	 	 catch(IOException ioe)
	 	 {
		
		 	 displayMesg("I/O error");
	 	 }
 	
	 	//Remove the deleted item from cho_Contact combobox.
 		//cho_Contact.removeItem(cho_Contact.getSelectedItem()); //aalok

	 }
	 
	 //If user clicks on Back button.
	 else if(ae.getSource()==cmd_Cancel)
	 {
		 
		 UpdateDeleteForm udform=new UpdateDeleteForm("Update Delete Form");
 	 udform.setSize(200,300);
 		udform.setResizable(false);
 		udform.setVisible(true);
		 dispose();		 
	 }

 	}

 	public void updateFile()
 	{
 		File file2=new File("tempfile");
		 File file=new File("Birthday");

		 file.delete();
		 file2.renameTo(file);
	 	 	
 	}
 	
 	//Obtain the record of item selected from the cho_Contact combobox.
 	public void itemStateChanged(ItemEvent ie)
 	{
 	if(ie.getSource()==cho_Contact)
 	{
	 	String item=(String)cho_Contact.getSelectedItem();
 		try
			{
				BufferedReader br=new BufferedReader(new FileReader("Birthday"));
				String str=new String();
				
				while((str=br.readLine())!=null)
				{
					StringTokenizer token=new StringTokenizer(str,"*");
					
					String eid=token.nextToken();
					String name=token.nextToken();

					if(item.equals(name))
					{
						String dd=token.nextToken();
						String mm=token.nextToken();
						String yy=token.nextToken();
						txt_Entryid.setText(eid);
						txt_Name.setText(name);
						txt_Year.setText(yy);
						cho_Day.setSelectedItem(dd);
						cho_Month.setSelectedItem(mm);
						repaint();						
						break;
					}
				
				
				}
				br.close();	

			} catch(FileNotFoundException fnfe)
			 {
				 
				 displayMesg("Birthday file not found");
			 }
			 catch(IOException ioe)
			 {
				 displayMesg("I/O error");
			 }
 	}	
 	}
	public boolean checkValues()
	{
	 	 
	 if((txt_Name.getText().trim().length()==0) || (txt_Year.getText().trim().length()==0))
	 {
		 displayMesg("Please Fill Each Entry");
		 return false;
	 }
	 if (txt_Year.getText().length()>4 || txt_Year.getText().length()<4)
	 {
		 displayMesg("Year Size Should Be 4");
		 return false;
	 }
	if((txt_Year.getText().trim().length()!=0)) 
	{
		try
	 	{
	 		Long.parseLong(txt_Year.getText().trim());
			displayMesg("Record updated");
			return true;
	 	}	 
	 	catch (Exception e)
	 	{
			displayMesg("Check Year Entry");
			return false;
	 	} 
		
	}
	 else
	 {
		 displayMesg("Record updated");
		 return true;
	 }

 }
 	//Returns the vector of Entryid+name values.
 	public Vector getList()
 	{
 	Vector n=new Vector(); 
 	
 	String str;
 	try
 	{
 		BufferedReader br=new BufferedReader(new FileReader("Birthday"));
	
 		while((str=br.readLine())!=null)
 		{
				StringTokenizer token=new StringTokenizer(str,"*");
				String s=token.nextToken();
				String s2=token.nextToken();
				n.addElement(s2);
 		}
			br.close();
			
 	} catch(FileNotFoundException fnfe)
 	 {
	 	 displayMesg("Birthday file not found");
	 	 
	 	 
	 }
	 catch(IOException ioe)
	 {
		 
		 displayMesg("I/O error");
		 
	 }
 	return n;
 	}

 	//Inner class to implement windowClosing() method.
	class MyWindowAdapter extends WindowAdapter
 	{
 	public void windowClosing(WindowEvent we)
 	{
		 
		 UpdateDeleteForm udform=new UpdateDeleteForm("Update Delete Form");
 	 udform.setSize(200,300);
 		udform.setResizable(false);
 		udform.setVisible(true);
 		dispose();
 	}

 	}

 public void displayMesg(String m)
 {
	 MyDialog dialog=new MyDialog(this,m,true);
	 dialog.setLocation(this.getX(),this.getY());
	 dialog.setSize(300,100);
	 dialog.setVisible(true); 
	 
 }
}