Check if an integer is null

Hello, I have a command where I use arguments to convert them to integer but I want to check whether or not they are null. When one is null, an error is sent to me:

Code:

Integer price = Integer.valueOf(args[1]);
                    Integer second = Integer.valueOf(args[3]);
                    Integer minute = Integer.valueOf(args[4]);
                    Integer hours = Integer.valueOf(args[5]);
                   
                    if(price.equals(null) || second.equals(null) || minute.equals(null) || hours.equals(null)) return false;

Thanks for your help !

 

How do I avoid that?

 

No you are not right:

An Integer as an Object can be null;

Integer integ = null;
if(inte.equal(null))...

while this (dont know the correkt word for it) cant be null;

int inte = null; //Error

 

@Spadax
Integer is not a primitive a int is and that is why a int can't be null, so you can actually use a Integer as a object or wrapper to some sort of degree.

You could do:

Code:java

 
Integer something = ??
if something != null
 

before parsing it else it will of course throw a NumberFormatException.

edit, just because you called valueOf it invokes a parseInt thus will result in a NumberFormatException in that case just check if the string is a number.

Just make sure that your arguments are not null.

@SuchtyTV
checking with == is fine to, however .equals does something different == checks against the reference, while .equals checks the internal parts of the object but since the object reference is already null == is more suitable.