System.out.print("contents of customer: ");
Iterator<Customer> cus = customerlist.iterator();	
while (cus.hasNext()) {		
Customer element = cus.next();	
System.out.print(element + " ");
 }					    System.out.println();

 
public class GradeTester {
 
	/**
	 * @param args
	 */
	public static void main(String[] args) {
 
		ArrayList<Grader> GraderList = new ArrayList<Grader>();
 
		Scanner in = new Scanner(System.in);
 
		System.out.println("Enter the number of students: ");
		String numStudents = in.next(); // Store the number of students
		int numStu = Integer.valueOf(numStudents); //Convert String to int
 
		System.out.println("Enter the Assignment name: ");
		String assignName = in.next(); // Store the assignment name
 
		for(int i = 0; i < numStu; i++){
 
			System.out.println("Enter the student name: ");
			String studentName = in.next(); // Store the student name
 
			System.out.println("Enter the student ID: ");
			String studentID = in.next(); // Store the student ID
 
			System.out.println("Enter the student score: ");
			String score = in.next(); // Store the student score
			int studentScore = Integer.valueOf(score); //Convert
 
			Grader graderObj = new Grader(assignName, studentScore, studentID, studentName);
			GraderList.add(graderObj);
		}
 
		Collections.sort(GraderList);
 
		ListIterator<Grader> iterator = GraderList.listIterator();	
		iterator = GraderList.listIterator();
		while (iterator.hasNext()) 
	          System.out.println("The scores are: " + iterator.next().getScore()); //Display ordered scores
 
 
 
		 //Display each value for each grader object
			for(Grader grader : GraderList){
 
			System.out.println(grader.getAssignmentName() + grader.getStudentID() + grader.getStudentName() + grader.getScore());
 
			}

 
public class Grader implements Comparable {
 
	String assignmentName;
	String studentID;
	String studentName;
	int score;
	/**
	 * @param assignmentName
	 * @param score
	 * @param studentID
	 * @param studentName
	 */
	public Grader(String assignmentName, int score, String studentID,
			String studentName) {
		super();
		this.assignmentName = assignmentName;
		this.score = score;
		this.studentID = studentID;
		this.studentName = studentName;
 
	}
 
	public String getAssignmentName() {
		return assignmentName;
	}
 
	public String getStudentID() {
		return studentID;
	}
 
	public String getStudentName() {
		return studentName;
	}
 
	public int getScore() {
		return score;
	}

    public String toString(){
        return //..... all data about customer
    }

System.out.print(element);
System.out.print(element.toString());