I know that in Java a variable can be `null` or not `null`. So I want to ask that is there any other possibility?

```
String abc = null; //or a value or anything or any other thing I don't know like undefined vs
if (abc == null) {
    System.out.println("IF");
} else if (abc != null) {
    System.out.println("ELSE IF");
}

```

In that code is there any need to insert an `else` branch? Like this:

```
String abc = null; //or a value or anything
if (abc == null) {
    System.out.println("IF");
} else if (abc != null) {
    System.out.println("ELSE IF");
} else {
    //any possibility to come here ???
}

```