I have a array that can sometimes be null (strings[0]) and I want to be able to detect when its null so I don't get a error and I can tell the user.
I tried a if statement
(if (strings == null){
//do my code
})
that didn't work. I tried to do try, catch (NullPointerException) but I'm getting an error in my IDE. Any help would be much appreciated.
You should check:
if(array != null && array.length !=0){
//relevant code
}else{
//relevant code
}
This helps if the array is not null and is not empty.
array.length instead of array.size()?
Try looping through your strings array and checking for the null objects like so:
for (int i = 0; i < strings.length; i++) {
if (strings[i] == null) {
System.out.println("The item at index [" + i + "] is null!");
}
}
Going off of what others have stated earlier
if (strings == null)
//code here
This pattern works great. A point to remember if you want to combine conditionals using the short circuit &&, || operators.
These two logical operators stop when the boolean value can be determined.
so if we have
if (strings == null && someFunction() == anotherFunction())
in the case that strings is null
someFunction() == anotherFunction() //<- this would not be evaluated.
because false && anyotherBool will never be true
