Java Software Engineer Question:
Download Job Interview Questions and Answers PDF
Explain me why doesn’t the following code generate a NullPointerException even when the instance is null?
Answer:
Test t = null;
t.someMethod();
public static void someMethod() {
...
}
There is no need for an instance while invoking a static member or method, since static members belongs to a class rather than an instance.
A null reference may be used to access a class (static) variable without causing an exception.
t.someMethod();
public static void someMethod() {
...
}
There is no need for an instance while invoking a static member or method, since static members belongs to a class rather than an instance.
A null reference may be used to access a class (static) variable without causing an exception.
Download Java Software Engineer Interview Questions And Answers
PDF
| Previous Question | Next Question |
| Explain me what is a good usecase of calling System.gc()? | Do you know what is the advantage of generic collection? |