Java Programmers, I Need Help!

Anyone know java? I need some help with a Bubble Sort.

i know i've used that but there is another problem with it that I can't find the solution to anywhere.

Its quite hard to explain but I've been given a series of student names and marks. I have to calculate the average of level 1 and level 2 marks and then sort them and output the grade with the student name. I can calculate the average and output it so that the marks are sorted in asscending order however the names just output Joe Bloggs 1 38%
Joe Bloggs 2 43%
etc
i.e the lowest score is always output next to joe bloggs 1 etc if that makes any sense.

 import java.util.*;

public class weighted_tutorial_4
{
	public static final int MAX_STUDENTS = 20;
	public static String[] surname = { "Bloggs1", "Bloggs2", "Bloggs3", "Bloggs4", "Bloggs5", "Bloggs6", "Bloggs7", "Bloggs8", "Bloggs9", "Bloggs10", "Bloggs11", "Bloggs12" };
	public static String[] firstname = { "Joe1", "Joe2", "Joe3", "Joe4", "Joe5", "Joe6", "Joe7", "Joe8", "Joe9", "Joe10", "Joe11", "Joe12" };
	public static int[] person_id = { 123401, 123402, 123403, 123404, 123405, 123406, 123407, 123408, 123409, 123410, 123411, 123412 };
	public static double[] lev2_mean = { 43.56, 45.23, 78.65, 50.00, 60.00, 80.23, 45.23, 45.23, 50.01, 49.99, 99.99, 40.00 };
	public static double[] lev3_mean = { 40.00, 55.33, 67.54, 65.00, 62.63, 70.56, 54.23, 36.45, 55.54, 59.34, 90.87, 40.00 };
	public static double[] overall_mean = new double[MAX_STUDENTS];
	public static int no_of_students = 12;
	
	public static void sort_students()
	{
		
		double temp1;
		int temp2;
		int n = no_of_students;
		//String[] firstname;
		//String[] surname;
		int person_id;
		
		
		for (int i=0; i < n; i++)
		{
			
			
			// Sort the numbers if there is more than one
			for (int j=0; j overall_mean[k])
					{
						// Swap hem
						temp1 = overall_mean[j];
						overall_mean[j] = overall_mean[k];
						overall_mean[k] = temp1;
					}
				}
			}
		}
		
	}
	

		public static void main(String[] args)
	{
		// Declare and initialise variables
		int i;

		// Work out overall mean for each student
		for (i=0; i < no_of_students; i++)
		{
			overall_mean[i] = ((lev2_mean[i] * 0.25) + (lev3_mean[i] * 0.75));
		}

		// Sort student arrays
		sort_students();

		// Output results
		for (i=0; i < no_of_students; i++)
		{
			// Output id, name and overall mean
			//System.out.println(person_id[i] + " " + firstname[i] + " " + surname[i]  + " : " + overall_mean[i]);
			// Output degree classification
			if(overall_mean[i] > 69.99)
				System.out.println(person_id[i] + " " + firstname[i] + " " + surname[i]  + " : " + overall_mean[i] + " 1st");
			else
				if(overall_mean[i] > 59.99)
				System.out.println(person_id[i] + " " + firstname[i] + " " + surname[i]  + " : " + overall_mean[i] + " 2:1");
			else
				if(overall_mean[i] > 49.99)
				System.out.println(person_id[i] + " " + firstname[i] + " " + surname[i]  + " : " + overall_mean[i] + " 2:2");
			else
				if(overall_mean[i] > 39.99)
				System.out.println(person_id[i] + " " + firstname[i] + " " + surname[i]  + " : " + overall_mean[i] + " 3rd");
			else
				if(overall_mean[i] < 39.99)
				System.out.println(person_id[i] + " " + firstname[i] + " " + surname[i]  + " : " + overall_mean[i] + " Fail");
			
			
			//System.out.println(person_id[i] + " " + firstname[i] + " " + surname[i]  + " : " + overall_mean[i]);
			
				
		}
	}
}

that's how i was mean't to put it but i don't know how to "connect" the names to the marks.

nick, you keep making that typo

I don't even notice it