Simple Bubble Sort using strings

[Bubbs]

Hi,
I have to sort customer names in a customer class i have created. Now, there is a method called getName() that basically returns the string name stored in an instance variable of the customer class.
This is a bubble sort method I have written. I really cant figure out why this throws a runtime null pointer exception at the IF statement which compares the strings. Please help.

private Customer[] bubbleSort(Customer c[])
{
  boolean swaped = true;
  Customer temp;
 
  if (c != null)
  {
    while(swaped)
    {
      swaped = false;
 
      for (int i = 0; i < c.length - 1; i++)
      {
        if (c[i].getName().compareTo(c[i + 1].getName()) > 0)
        {
          temp = c[i];
          c[i] = c[i + 1];
          c[i + 1] = temp;
          swaped = true;
        }
      }
    }
  }
  return c;
}

Thanks

[Bubbs]

Same Null pointer exception at the printArray(), that prints the toString of each object in the array to a JTextArea called infoArea. The exception is at the line
infoArea.setText(c[i].toString());

Heres the code
private void printArray(Customer c[])
{
if (c != null)
{
for(int i = 0; i < c.length; i++)
{
infoArea.append(c[i].toString());
}
}
}
Thanks

[JosAH]

Well, the at least one of your c[i] elements is null and the error must be found
somewhere else.

kind regards,

Jos

[r035198x]

Yep, either one of the c[i]s is null or infoArea itself is null.
You could print each of them before you "dot" them to catch the culprit.

[Bubbs]

thanks guys, much appreciated.

[BigDaddyLH]

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