Note: (Restricted functionality due to obvious reasons!)
Minimal Code ( Raw-View ) :
import java.io.*;
class Login
{
public static void main(String cmd[]) throws Exception
{
try
{
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
FileReader fr = new FileReader("users.txt");
BufferedReader matcher = new BufferedReader(fr);
System.out.println("Username : ");
String usrnm = br.readLine();
System.out.println("Password :");
String passwd = br.readLine();
System.out.println("Entered data : "+usrnm+", "+passwd+" ! ");
String filedata = String.valueOf(matcher);
if(filedata.contains((String)(usrnm+" "+passwd)))
{
System.out.println("Login Succesful !");
}
else
{
System.out.println("Login Failure !\nAccess-Denied"+filedata);
}
/*int temp = 0;
while((temp = fr.read())!=-1)
{
System.out.print(" "+(char)temp);
}*/
}
catch(Exception e)
{
System.out.println(e);
}
}
}