Printing a listing from an array of objects

Question

I know I'm missing something simple here but for the life of me I can't spot it. The code below should print a list of student names to the screen. At the moment it only prints the last name entered into the array. I will kick myself when I see the answer but can anyone suss this out ? Many thanks for any help.
// A Program called StudentDetails3.java which inserts student names into an array according to
// a calculated hash Index and then prints out the name list in this order
import javax.swing.JOptionPane;
public class StudentDetails3
// Member Section
// Private members
private static String studentName;
// Public members
public static String input = JOptionPane.showInputDialog(" Please enter the number of students in the class : - ");
public static int maxNum = Integer.parseInt(input);
public static int hashIndex = 0;
// Constructor Section
StudentDetails3 ( String newStudentName )
studentName = newStudentName.toUpperCase();
// Method Section
public int hashCalc()
int total = 0;
for( int charNo = 0; charNo < studentName.length(); charNo ++ )
char letter = studentName.charAt(charNo);
int asciiVal = letter;
     if( studentName.charAt(charNo) ==' ')
     asciiVal = 0;
     total = total + asciiVal;
hashIndex = total % maxNum;
return hashIndex;
public void output()
System.out.println(" The student's name and hash index is " + studentName + " " + hashIndex );
static class DetailsStorage
// Member Section containing the array into which the student objects will be inserted
private Object [] array;
private int current;
// Constructor
DetailsStorage ( int noOfStudents )
array = new Object[ noOfStudents ];
current = 0;
// Method for adding name to array
public void add ( Object StudentDetails3 )
{  if ( array [ hashIndex] == null )
array [ hashIndex ] = StudentDetails3;
else if ( (hashIndex + 1) <= (array.length-1) )
do
{ hashIndex = ( hashIndex + 1 );
     if ( array [ hashIndex ] == null )
     {   array [ hashIndex ] = StudentDetails3;
     break;
} while ( (hashIndex + 1) <= (array.length-1) );
     else
          for ( int firstLp = 0; firstLp < array.length; firstLp ++ )
     if ( array [ firstLp ] == null )
     {   array [ firstLp ] = StudentDetails3;
               break;
public void printOut ( )
{   int loop = 0;
System.out.println ( " Name\t\tCourse " );
System.out.println ( "____\t\t_________ " );
     for ( loop = 0; loop < array.length; loop ++ )
     System.out.println ( ( ( StudentDetails3 ) array [ loop ] ).studentName );
// Main Program for testing
public static void main( String[] args )
{   String  name;                                              
// Obtain list of names from the user
DetailsStorage nameList = new DetailsStorage( maxNum );
for( int lp = 0; lp < maxNum; lp++ )
{   name =  JOptionPane.showInputDialog(" Please enter the name of student in full ( e.g. Gareth Edwards )");
StudentDetails3 newDetails = new StudentDetails3( name );
newDetails.hashCalc();
     nameList.add ( newDetails );
newDetails.output();
nameList.printOut();
System.exit(0);
}

Answer 1

You've made the student name a static field, which means that there's only one for the whole class.
So the last one you input is the one you use for everybody.