Need help with a java project

package gradesaverage;//Package name
import java.util.Scanner;//imports scanner
import java.util.Arrays;
/**
 *
 * 
 */
public class GradesAverage {
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {//Main method
        // TODO code application logic here
        NoOfStudents();//Runs method code
        
        Scanner in = new Scanner(System.in);//Declares scanner
        int students = in.nextInt();//Take user input
        int[] arrayGrades = new int[students];//Creates array
        int i = 0;//Value for loop
        int s = 0;//Student number grade
        
        
        for(i=0; i < arrayGrades.length; i++)//For loop
        {
        s++;//Increments student number
        System.out.print("Enter number " + s + " student grade : ");//Prints to the console
        int grade = in.nextInt();//Takes user input and saves in grade
        arrayGrades[i] = grade;//Takes input from grades into the array
        //System.out.println(Arrays.toString(arrayGrades));
        }
        int l;
        for(l=0; l < arrayGrades.length; l++){
        System.out.println(arrayGrades[l]);
            int a = in.nextInt();
  
        System.out.println(arrayGrades[l]);
            int b = in.nextInt();
        System.out.println(b);
        
        
        }
       
        
        
        Average();
        Max();
        Min();
        PassFail();
            
    }
    public static void NoOfStudents(){//NoOfStudents method
        System.out.print("Enter the total number of students: ");
        //This is a method
    }
    
    public static void Average(){
        int average;
        //This is a method
    }
    public static void Max(){
        System.out.println("");
        //This is a method
    }
    public static void Min(){
        System.out.println("");
        //This is a method
    }
    public static void PassFail(){
        System.out.println("");
        //This is a method
    }
}