Static keyword
The static keyword in Apex is used to define class-level variables and methods.
- It is used to avoid Recursion
- Reset only per transaction
- Static can be only class variables
| Calling From | Calling To | Allowed? | Example |
|---|---|---|---|
| Static | Static | ✔ Yes | Utility → Utility |
| Static | Non-Static | ❌ No | static → instance not allowed unless creating object |
| Non-Static | Static | ✔ Yes | instance → class |
| Non-Static | Non-Static | ✔ Yes | instance → instance |
