how to check if an object has been set?

[developerinlondon]

i am quite new to Java and just porting to it from other language, but i cant seem to find any good books/documentation on this language. I am trying to test if a variable exists or not? does anyone know how?

eg

if (!exists(this.fh)) {
this.fh = ...;
}

except 'exists' doesnt work in java!

 

[Diancecht]

That make no sense.

Variables in Java are set at compile, not runtime.

You can find good tutorials aj Sun's website.

Cheers,

Dian

 

[sedj]

Have you ever done any compiled langauge programming ? Scripting languages are very very different to compiled languages.

You may want to start at the beginning :

http://www.tek-tips.com/viewthread.cfm?qid=1020970&page=1

--------------------------------------------------
Free Database Connection Pooling Software

http://www.primrose.org.uk

 

[sedj]

oops, meant

http://java.sun.com/docs/books/tutorial/java/index.html

--------------------------------------------------
Free Database Connection Pooling Software

http://www.primrose.org.uk