Genterate sequence of prime numbers between two numbers

import java.io.*;
class PrimeSeries
{
public static void main(String args[])
{
  BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));
  int a=0,b=0;
try
{
System.out.println("Enter The Starting Number of Range");
a=Integer.parseInt(bf.readLine());
System.out.println("Enter The Ending Number of Range");
b=Integer.parseInt(bf.readLine());
}
catch(Exception e)
{
e.printStackTrace();
}
  int i;       
  for(i=a;i<=b;i++)
{   
int c,d,e=2,f=2;
c=i/2;
    while(e<=c)
{   
  d=i%e;       
    e++; 
  if(d==0)
{
f=6; 
break;
}
}
if(f<5)
  System.out.println(i);
} 
 
} 
}