Programming Forums - java bubble sort help

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zip2kx

Mar 4th, 2005 9:00 AM

java bubble sort help

Right i cant get it to work and im out of ideas so some programmring guru plz help T__T

this is my bubblesort class file:

public class sort{



public static void bubbelSort(film data[]){

        for (int m = data.lenght -1; m > 0; m--){

                for (int n = 0; n < m; n++){

                        if(data[n].langd > data[n+1].langd){

                                int temp = data[n].langd;

                                data[n].langd = data[n+1].langd;

                                data[n+1].langd = temp;

                        }

                }

        }

}

}

//

and this the part that calls the class in my app

//

sort.bubbelSort(film);

                

                System.out.print("Sorterad efter langd: ");

                for (int i = 0; i < 5; i++){

                        System.out.print(film[i] + " ");

                }

note that it's in a case.
and the error i get when i javac it

//

D:\Java grejer>javac inlupp_DVDDaAr.java

.\sort.java:3: cannot resolve symbol

symbol  : class film

location: class sort

public static void bubbelSort(film data[]){

                              ^

1 error

Anything helpful is accepted :)

Dizzutch

Mar 4th, 2005 9:14 AM

what's film? is there a class called film? you're passing film into the sort method, but that's the name of the variable, when you create film, you must do something like [Class] film = new [Class]() the name of the Class is the Type of variable you're passing through.

zip2kx

Mar 4th, 2005 9:26 AM

oh crap forgot that. Film is a "array" (i think... im translating from swedish -> english so it might be wrong)

i used it to

DVDDaAr film[]=new DVDDaAr[100];

DVDDAaAr is the main class file that sorts the other information that i send in (it works ).

Dizzutch

Mar 4th, 2005 9:59 AM

ok, so DVDaAr data[] is what you wanna accept in sort()

zip2kx

Mar 4th, 2005 11:13 AM

So it's

sort.bubbelSort(DVDDaAr data[]);

? or did i get it wrong?

edit: changed some stuff. i Changed

Public static void bubbelSort(film data[]){



to



Public static void bubbelSort(DVDDaAr data[]){

and

for (int m = data.lenght -1; m > 0; m--){

to

for (int m = data.length -1; m >0; m--){

every .langd 

to

.hamtaLangd

.hamtaLangd is a getter which returns a int.

and now im stuck with these 2 last errors

.\sort.java:8: unexpected type

required: variable

found   : value

                                data[n].hamtaLangd() = data[n+1].hamtaLangd();

                                                  ^

.\sort.java:9: unexpected type

required: variable

found   : value

                                data[n+1].hamtaLangd() = temp;

                                                    ^

2 errors

Dizzutch

Mar 4th, 2005 12:37 PM

what's hamtaLangd?

zip2kx

Mar 4th, 2005 12:53 PM

a method that returns a private value

Dizzutch

Mar 4th, 2005 1:47 PM

looks like you're not calling it according to it's signature

meribia_pro_software

Mar 9th, 2005 9:00 PM

Hello all, I'm new to this forum, but I consider myself an expert in Java (as well as in 6 other computer languages). I think I can help out with this problem if anyone's still paying attention to this thread ....

I wrote a small C++ routine that implements the Bubble Sort algorithm a while back and it should be able to be ported to Java quite easily. Here it is:

void SortObject::bubbleSort () {

int i;
int tmp;

for ( i = 0; i < count - 1; i++ ) {
if ( array[i] > array[i+1] ) {
tmp = array[i];
array[i] = array[i+1];
array[i+1] = tmp;
i = 0;
}
}

}

--------------------------------------------------------------------------------

Download SortObject++: veritedonato.cihost.com/sort.zip
MainWebsite: veritassoftwarecreations.net/

Dizzutch

Mar 9th, 2005 9:02 PM

his problem wasn't the algorithm, he had some syntax errors in his code.

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