Anfängerfrage zum Programmieren

import java.io.*;

public class Max {

  public static void main( String[] args ) {

  int max = 0;

  int a = readInt();

  int b = readInt();

  int c = readInt();

  if (a > b)

      if (a > c)

          max = a;

      else

          max = c;

  else

      if (b > c)

          max = b;

      else

          max =c;

  System.out.print("max: ");

  System.out.println(max);

  }

  private static int readInt() {

    int retval = 0;

    try {

      byte[] buffer = new byte[32];

      int len = System.in.read(buffer);

      retval = Integer.parseInt(new String(buffer).trim());

    }

    catch ( IOException e ) {

      System.out.println(e);

      retval = 0;

    }

    catch ( NumberFormatException e ) {

      System.out.println(e);

      retval = 0;

    }

    return retval;

  }

};