Java 7 Fix

java7fix.java

  // String.format("%1$#5s", book) does not throw an exception in Java 6,
  // but it does in Java 7, so replace this code with a call to the method below,
  // e.g. padWithZeroes(book, 5)
  private static String padWithZeroes(String s, int length) {
    if (s.length() >= length) {
      return s;
    }
    int numZeroes = length - s.length();
    StringBuffer buffer = new StringBuffer(numZeroes);
    for (int count = 0; count < numZeroes; count++) {
      buffer.append("0");
    }
    return buffer.toString() + s;
  }