title: DecimalFormat in Java program, I get an error that says cannot find symbol twoDigitPattern
body: <p>The code below, was tested and all runs great, until I added the DecimalFormat. Now it errors and says it can not find the symbol "twoDigitPattern".  I tried to use + DecimalFormat(average)) and it also errors.</p>
  
  <pre><code>class IntegerInputWithCkAndAverage
  {
  
     public static void main( String[] args )
     {
        final int SENTINEL = 0;
        int numEntered = 0;
        int accumulator = 0;
        int counter = 0;
        double average = 0;
  
        Scanner scan = new Scanner( System.in );
        System.out.print( "Enter a integer, or 0 to end &gt; " );
        while( !scan.hasNextInt() ) {
           String garbage = scan.nextLine();
           System.out.
                   print( "Invalid input. Please enter an integer, or 0 to end" );
        }
        numEntered = Integer.parseInt( scan.nextLine() );
        while( numEntered != SENTINEL ) {
           accumulator = accumulator + numEntered;
           counter++;
           System.out.print( "Enter another integer, or 0 to end&gt; " );
           while( !scan.hasNextInt() ) {
              String garbage = scan.nextLine();
              System.out.print( 
                      "Invalid input. Please enter an integer or 0 to end" );
           }
           numEntered = Integer.parseInt( scan.nextLine() );
        }
        average = (double) accumulator / counter;
        DecimalFormat twoDigitPattern = new DecimalFormat( "#0.00" );
        System.out.println( 
                "the total of the " + counter + "numbers entered is " +
                 accumulator + " and the average is " + twoDigitPattern( average ) );
     }
  }
  </code></pre>