need help on a program

[noobzor]

hi

I need to create a program that uses JOptionPane to put in 8 persons name,8 ID, and 3 grade exams, with 8 each.I need to also get the final grade of the 3 exams. ALso i need to sort arrays from highest to lowest. Find the highest score in exam 2, average score in exam3, and the average grade of the final exam.

here is what i have so far

import javax.swing.*;
public class Gradessss
	public static void main(String[] args)
	{
		//declare arrays, their types, and load them
		String[]course = {"CIT111_01"};
		String stu_id;
		String lastName;
		int exam1[] = {50, 75, 97, 37, 78, 88, 55, 97};
		int exam2[] = {90, 34, 85, 88, 78, 99, 55, 37};
		int exam3[] = {75, 20, 90, 78, 78, 88, 99, 55};
		double[] finalgrade = new double[8]; 
		
		int x;
		//last name
		//print out last name, course grade
		//lowest score in exam1 (of all grades)
		//highest score in exam2
		//average score in exam3
		//highest lowest average final grade
		//find all grades but name for location 4
		//print out array location 4:array location(4) is exam(4)
		//locateLastName(Lastname);
		//public static void locateLastName(String lastName)
		//{
		//for
		//if(lastName(x)== "Golling")
		//system.out
		//lastname(x) finalgrade(x)
	
		
		for (x = 0; x < 8; x++)
		{

		int v = 0;
		String[] last = new String[8];
		lastName = JOptionPane.showInputDialog(null, "Enter 8 last names");
		last[1] = lastName;
		
	
		
		exam1 = JOptionPane.showInputDialog(null, "Enter the grade for the first exam");
			exam1[i] = Integer.parseInt(exam2);
			
		exam2 = JOptionPane.showInputDialog(null, "Enter the grade for the first exam");
			exam2[i] = Integer.parseInt(exam2);
			
		exam3 = JOptionPane.showInputDialog(null, "Enter the grade for the first exam");
			exam3[i] = Integer.parseInt(exam3);

		
		
			String[] id = new String[8];
			stu_id = JOptionPane.showInputDialog(null, "enter 8 student IDs");
			id[1] = stu_id;
		
		
			double finalGrade = (exam1[x] + exam2[x] + exam3[x]) / 3;
			
			System.out.println("The arrays are:\n" + x + "course :" + "\texam1:" 
			+ exam1[x] + exam2[x]+ exam3[x] + finalGrade);
		
		int comparison1 = exam1.length - 1;
		for(int a = 0; a < exam1.length - 1; ++a)
		{
			for(int b = 0; b < comparison1; ++b)
			{	
				if(exam1[b] > exam1[b + 1])
				{
					int temp = exam1[b];
					exam1[b] = exam1[b + 1];
					exam1[b + 1] = temp;
				}
			}
		}
			
		System.out.println("Lowest grade in Exam 1 is: " + exam1[0]);
			
		int comparison2 = exam2.length - 1;
		for(int a = 0; a < exam2.length - 1; ++a)
		{
			for(int b = 0; b < comparison2; ++b)
			{	
				if(exam2[b] < exam2[b + 1])
				{
					int temp = exam2[b];
					exam2[b] = exam2[b + 1];
					exam2[b + 1] = temp;
				}
			}
		}
		
		System.out.println("Highest grade in Exam 2 is: " + exam2[0]);	
		
		double aveExam3 = (exam3[0] + exam3[1] + exam3[2] + exam3[3] + exam3[4] +
			exam3[5] + exam3[6] + exam3[7]) / 8;
		
		System.out.println("Average score of Exam 3 is: " + aveExam3);
		
		double aveFinalExam = (finalExam[0] + finalExam[1] + finalExam[2] + finalExam[3] + finalExam[4] +
			finalExam[5] + finalExam[6] + finalExam[7]) / 8;
		
		System.out.print("Average grade of Final Exams is: " + aveFinalExam);
		
		double comparisonFinLow = finalExam.length - 1;
		for(double c = 0; c < finalExam.length - 1; ++c)
		{
			for(double d = 0; d < comparisonFinLow; ++d)
			{	
				if(finalExam[d] > finalExam[d + 1])
				{
					double temp = finalExam[d];
					finalExam[d] = finalExam[d + 1];
					finalExam[d + 1] = temp;
				}
			}
		}
		
		//System.out.println("");
		
		int comparisonFinHi = finalExam.length - 1;
		for(int a = 0; a < finalExam.length - 1; ++a)
		{
			for(int b = 0; b < comparisonFinHi; ++b)
			{	
				if(finalExam[b] < finalExam[b + 1])
				{
					int temp = finalExam[b];
					finalExam[b] = finalExam[b + 1];
					finalExam[b + 1] = temp;
				}
			}
		}
		
		//System.out.println("");
		
		System.exit(0);
	}
}