(URI) Média 3 - Solução

import java.io.*;
import java.util.*;
import java.text.DecimalFormat;

class Main  { 
    public static final int MAX = 4;
   
    public static void readGrades(Scanner sc, float[] grades) {
        for (int i = 0; i < MAX; i++) {
            grades[i] = sc.nextFloat();       
        }
    }
   
    public static float getAverage(float sumGrades, int div) {
        DecimalFormat df = new DecimalFormat("0.0");
       
        return Float.parseFloat(df.format(sumGrades/div));
    }
   
    public static void printAnswer(Scanner sc, float average) {
        System.out.println("Media: " + average);   
        if (average >= 7.0) {
            System.out.println("Aluno aprovado.");
        }
        else if (average < 5.0) {
            System.out.println("Aluno reprovado.");
        }
        else {
            System.out.println("Aluno em exame.");
           
            float newGrade = sc.nextFloat();
            average = getAverage(average+newGrade, 2);
           
            System.out.println("Nota do exame: " + newGrade);
            if (average >= 5.0) {
                System.out.println("Aluno aprovado.");
            }
            else {
                System.out.println("Aluno reprovado.");
            }
            System.out.println("Media final: " + average);
        }
    }
   
    public static void process() throws NumberFormatException, IOException {   
        Scanner sc = new Scanner(System.in);
       
        float[] grades = new float[MAX];
       
        readGrades(sc, grades);

        float sumGrades = grades[0]*2 + grades[1]*3 + grades[2]*4 + grades[3];
        float average = getAverage(sumGrades, 10);
       
        printAnswer(sc, average);   
                 
        return;
    }
   
    public static void main(String[] args) throws NumberFormatException, IOException {
        Main m = new Main();
        m.process();

        System.exit(0);
    }
}