.class expected

[krinz10]

Hi, I am doing an apartment rentals program but i need to bubble sort the array of a user defined class customerDetails (this entails all the details of the customer) However, when i am calling that there is an error:
------------------------------------------------------------------------------------------------------------
apartmentRentalCode.java:476: '.class' expected
Bubblesort(customer[], n );
^
apartmentRentalCode.java:476: ')' expected
Bubblesort(customer[], n );
^
2 errors

----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.
--------------------------------------------------------------------------------------------------------------
Here is the code:
public void sortCustomer()
{
customerDetails[] customer = new customerDetails[myCustomerLinkedList.sizeOfCustomerList() - 1];
int[] cusIDArray = new int[myCustomerLinkedList.sizeOfCustomerList()-1];
int z = 0;
File fileName = new File("C:\\Users\\Sony\\Desktop\\ComputerScienceDos sier\\JavaCode3\\customerInBinary.dat");
int cusID = 0;
customerDetails readCustomerRecord = new customerDetails();
char status;
char[] fName = new char[30];
char[] lName = new char[30];
char[] dob = new char[10];
char[] passportNo = new char[10];
char[] mobileNo = new char[10];
char[] email = new char[50];
int j = 0;

try {
RandomAccessFile raf = new RandomAccessFile(fileName, "r");
raf.seek(0);
try {
while (true){
status = raf.readChar();
readCustomerRecord.cusID = raf.readInt();

for(j=0; j<30; j++) {
fName[j] = raf.readChar();
}
readCustomerRecord.fName = readCustomerRecord.fName.copyValueOf(fName);

for(j=0; j<30; j++) {
lName[j] = raf.readChar();
}
readCustomerRecord.lName = readCustomerRecord.lName.copyValueOf(lName);

for(j=0; j<10; j++) {
dob[j] = raf.readChar();
}
readCustomerRecord.dob = readCustomerRecord.dob.copyValueOf(dob);

for(j=0; j<10; j++) {
passportNo[j] = raf.readChar();
}

readCustomerRecord.passportNo = readCustomerRecord.passportNo.copyValueOf(passport No);

for(j=0; j<10; j++) {
mobileNo[j] = raf.readChar();
}

readCustomerRecord.mobileNo = readCustomerRecord.mobileNo.copyValueOf(mobileNo);

for(j=0; j<50; j++) {
email[j] = raf.readChar();
}

readCustomerRecord.email = readCustomerRecord.email.copyValueOf(email);
cusIDArray[z] = readCustomerRecord.cusID;
customer[z] = readCustomerRecord;
}


}
catch (EOFException eof){
raf.close();
}
catch (IOException E){
System.out.println( "Problems reading " + fileName );
raf.close();

}

}
catch (IOException X){

System.out.println("IO Problems with " + fileName );

}
int a = 0;
int n =myCustomerLinkedList.sizeOfCustomerList()-1;
System.out.println(n);
Bubblesort(customer[], n );
for(a = 0; a < n; a++){
System.out.println(cusIDArray[a]);
}


}
public void Bubblesort (customerDetails data[],int n) {
int i,j;
customerDetails tmp;

for (i=0; i<n-1; i++) {
for (j=0; j<n-i-1; j++)
if (data[j].cusID > data[j+1].cusID) {
tmp = data[j];
data[j] = data[j+1];
data[j+1] = tmp;
}
}
}
--------------------------------------------------------------------------------------------------------------
can u please help me figure this out...my brain is dead after hours of fiddling around...
cheers x

[JosAH]

When you want to pass an array to a method as a parameter you simply mentions its name, i.e. you don't use the square brackets. so:

Bubblesort(customer, n );
 

btw, there is also no need to pass the length of the array as well, i.e. the array 'knows' its length.

kind regards,

Jos

[krinz10]

many thanks :)
but now i am getting a null pointer exception [line is in italics]
I know the file is there, i have checked the path as well.
Q: is it fine to put data[j].cusID when the array has cusID as part of it?
------------------------------------------------------------------------------------------------------
public void Bubblesort (customerDetails data[],int n) {
int i,j;
customerDetails tmp;

for (i=0; i<n-1; i++) {
for (j=0; j<n-i-1; j++)
if (data[j].cusID > data[j+1].cusID) {
tmp = data[j];
data[j] = data[j+1];
data[j+1] = tmp;
}
}
}
----------------------------------------------------------------------------------------------------
I don't know what is null?? - any ideas?

cheers x

[JosAH]

Every non-primitive (i.e. not int, double etc.) variable actually is just a reference, a pointer to an object. You have to make it point to an object. For member variables, if you don't make it point to an object, it is said to point to nothing which is represented by the value 'null', i.e. such a variable has a value null. Of course you can't dereference ('use the dot notation') on a variable with a null value.

kind regards,

Jos

[krinz10]

Thanks I will check again.

cheers x