March 7, 2013
Checking Array for null element
Question by V1rtua1An0ma1y
So I’ve created my own class with 5 private fields: Each is an array with a pre-set length. It’s my way of creating a table, where each array is a column, and they have pre-set lengths because not every cell will contain an element (So, not using anything dynamic).
Anyway, my question is: Can I check to see if a specific cell of a specific array contains “null”? Using .equals(null) gives a nullpointerexception 🙁
Answer by user000001
When you call .equals(...) you call a method of the object. If it is null, it has no method. Therefore null check like this:
if (myArray[position] == null) {
....
}
Answer by Starx
Mixed up for loops and null construct
for(Integer ints : intNum) {
if(intNum != null) {
//valid
}
}
