Making an int null

[plcaine]

Hello,

I am pretty new to Java programming. I am having trouble with trying to convert an integer of value 0 to NULL. I have tried the following and it does not work:

if (a==0)
{
a=NULL;
}

Any suggestions? Is it even possible to put an integer back to NULL after it has been initialized? If asking for user input, is there a way for Java to leave the value NULL if the user simply hits "enter?"

Thank you in advance for your help.

[alexanderw]

In java int is a primitive type so you can't set it to null.
try setting it to -1 or 0 instead.

Also using a=NULL; won't work because java is case sensitive,
(all keywords are lower case) you need to use a=null; instead.


Regards,
Alex

[r035198x]

If you are using 1.5 or above (you should be) then read about autoboxing.
With autoboxing you can do sill things like

Integer i = 20;
i = null;