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.

[CODE=java]private Customer[] bubbleSort(Cust omer 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().comp areTo(c[i + 1].getName()) > 0)
{
temp = c[i];
c[i] = c[i + 1];
c[i + 1] = temp;
swaped = true;
}
}
}
}
return c;
}[/CODE]

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.setTex t(c[i].toString());

Heres the code
private void printArray(Cust omer 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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