Primitive data types cannot be null. Only Object data types can be null.
There are 8 primitive types in Java:
| Data Type | Size | Description |
|---|---|---|
| byte | 1 byte | Int8 |
| short | 2 bytes | Int16 |
| int | 4 bytes | Int32 |
| long | 8 bytes | Int64 |
| float | 4 bytes | Single |
| double | 8 bytes | Double |
| boolean | 1 bit | Boolean |
If you use Long (wrapper class for long) then you can check for null‘s:
Long longValue = null;
if(longValue == null)