// class Student
import java.io.*;

public class Student implements Serializable
{
    // instance variables
    private int studentId;
    private String name;

    /**
     * Constructor for objects of class Student
     */
    public Student(int id, String name)
    {
        this.name = name;
        studentId = id;
    }


    public String getName()
    {
        return name;
    }

    public void setName(String newName)
    {
        name = newName;
    }

    public void setId(int newId)
    {
        studentId = newId;
    }

    public int getId()
    {
        return studentId;
    }

}

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.Writer;
public class Demo{
  public static void main(String[] argv)
                        throws Exception{
    Writer output = new BufferedWriter(new FileWriter("fixed.txt"));
    BufferedReader freader =
     new BufferedReader(new FileReader("orinal.txt"));
    String s;
    while ((s=freader.readLine())!=null){
      String tokens[] = s.split(",");
      String id = f[0];
      String name = f[1];
      // check against the ID or ID's you don't want. If the current ID is not the one
      // you don't want then write it to the output file
      if (!id.equals("00001") {
          output.write(s + "n");
      }
    }
    freader.close();
    output.close();
  }
}

public void writeToStudentFile(int idToIgnore)
{
    try{
        writer = new BufferedWriter(new FileWriter(studentFile, true));
        Iterator it = students.iterator();
        while (it.hasNext())
        {
            Student s = (Student)it.next();
            if (s.getId() != idToIgnore)
            {
                writer.write(s.getId() + "," + s.getName() + "n");
            }
        }
        writer.flush();
        writer.close();
    }
    catch(IOException e){System.out.println(e);}
}