readChar() method and EOF exception

I am a CS major and am trying to improve on my programming skills, but I have come across a roadblock. I am using the readChar() method to read characters one by one from a specified file and almost everything is going smoothly except that I am not sure on the most efficient way to let my program know it has reached the end of a file. I am trying to use the End Of File execption, but it still reads on forever. I pasted my code here for an illustration. Any pointers?

- Alex


import java.io.*;

public class FileDemo {
    public static void main(String[] args) throws IOException {

     if (args.length < 1){
         System.out.println("Program syntax: java FileDemo FILE.XXX");
         System.exit(1);
     }

     DataInputStream in = new DataInputStream(
                          new FileInputStream(args[0]));

     InputStreamReader isr = new InputStreamReader(in);


     System.out.println("<<Start of file>>");


     try {
         char newChar = (char) isr.read();
         while(true) {
          System.out.print(newChar);
          newChar = (char) isr.read();
         }
     } catch (EOFException e) { }
     in.close();
     
     System.out.println("<<End of file>>");    
    }
}