Making code more precise

Question

Hi my name is vicente and i was wondering if the following code is as precise as it could be. I made the program in the course of 1 hour during class and it is quite simple. Let me know if there are things i can clean up. thanks
import java.io.*;
class Program49A1
     public static void main ( String[] args ) throws IOException
          EasyReader indata = new EasyReader ("testscores.dat");
          //initialize the variables
          int num=0,index,count, count2,newsize;
          String input,fName,lName,input2;
          double total=0, average,min=0,max=0;
          //read the first piece of data and save it to some variables for later          
          input = indata.readLine();
          count = Integer.parseInt(  input );
          index=count;
          count2=index;
          double testScores[] = new double[index+1];     
          //get the student's name and begin output.
          fName = indata.readLine();
          lName = indata.readLine();
          System.out.println(fName+ " " +lName+"'s test scores:");
          //read the first test score.
          input2 = indata.readLine();
          testScores[index] = Double.parseDouble(  input2 );
          total = total + testScores[index];
          //initializing the first element of the array as both the largest and the smallest number
          min=testScores[index];
          max=testScores[index];
          for( count=count-1; count != 0; count--)
               //begin the for loop by printing the test score and a comma.
               System.out.print( testScores[index] + ", ");
               input2 = indata.readLine();
               testScores[index] = Double.parseDouble(  input2 );
               //find the max and the min
               if ( testScores[index] <= min)
                    min = testScores[index];
               if (testScores[index] >= max)
                    max = testScores[index];
               //calculate average
               total = total + testScores[index];
          //print out the last testscore of the array.
          System.out.print(testScores[index]);
          //if the max and the min are the same number (unlikely)
          //this will make sure the new average is correctly calculated
          if(max==min)
               newsize =index-1;
          else
               newsize=index-2;
          //calculations and final output
          average = (total/count2);
          System.out.println("\n\naverage: "+average);
          System.out.println("\nmin:" +min+"\n\nmax: "+max);
          //subtract the sum of the max number and the lowest number from the total.
          total =total -(min+max);
          //average is now equal to the new total divided by the new number of numbers.
          average=total/(newsize);
          //final output
          System.out.println("\n\naverage: "+average);
          System.out.println("\n\n");               
}im using easy reader which you can find here: http://www.skylit.com/javamethods-old/EasyReader.java

Answer 1

Any place you have a comment could potentially be re-factored into a private method with a descriptive name. When you see 'blocks' in your code delineated by comments, always consider breaking up the larger method into smaller ones. Blocks within loops are also excellent candidates for a private method.
Consider making all string literals in your class into constants that are static and final. (Don't bother doing this for logging message or System.out.println(), it's overkill).
Consider catching the IOException rather than letting it propogate out of the main() method. You should instead display a meaningul message to the user. Stack traces are not that friendly on the eyes to ordinary users.
- Saish