Re: what am i doing wrong here?

Jeremy Watts wrote:
"Jeremy Watts" <jwatts1970@xxxxxxxxxxx> wrote in message news:eUioe.1480$jS3.477@xxxxxxxxxxxxxxxxxxxxxxx

"Andrew McDonagh" <news@xxxxxxxxxxxxxxxxxxxxx> wrote in message news:d7rte8$cda$1@xxxxxxxxxxxxxxxxxxxxxxxx

Jeremy Watts wrote:

Hi,

I've written a Java method that uses a list to return 5 three-dimensional arrays containing 'Big Decimal' entries. However I also want to return a single boolean type variable, but cant seem to get the program to do this.

My method basically goes :-

start method {

declare arrays and variables
List result = new ArrayList(5)
..
..
..
..
REST OF METHOD
..
..
..
result.add(first array)
result.add(second array)
etc
result.add(fifth array)

return (result)

end method }


This works fine for just the arrays, but if I attempt to add the line
'result.add(LDMexists)' , to return the boolean variable 'LDMexists' then I get the error message ' cannot resolve symbol - method add(boolean)'

I have declared the boolean type LDMexists, so I cant see what I'm doing wrong here - how do I get it to return the five arrays and the boolean variable LDMexists?

Thanks

the ArrayList only allows Object references to be added, where as 'boolean' (Note the lowercase B) is a primitive not an object.

you can change the code to...

result.add(Boolean.valueOf(LDMexists));

This adds a reference to the Boolean object (note the uppercase B) to the arraylist.

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Boolean.html#valueOf(boolean)

HTH

Andrew 

Hi Andrew,

Thanks for that, that seems to work. How would you then reference that variable though once the procedure has been called? I cant seem to get that bit to work now.

Thanks
Jeremy


managed to get that to work - it seems that the boolean value is returned as a string? so i needed to put quote marks around the 'true' or 'false' :)






nope, you have mere stringified the Boolean object.

Boolean fromTheList = (Boolean)result.get(index);

LDMexists = fromTheList.booleanValue();


http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Boolean.html#booleanValue()


.

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