What's the returning a value in Java?

Question

public void warning(){
    System.out.println("Watch out!");
}

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public void warning(){
    System.out.println("Watch out!");
    return;
}

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We must use "return" statement with void methods. Bot of these bring same output. What's the difference?

Answer 1

You needn't use return with void methods in Java, although some coding conventions may call for it, it is not a requirement of the language. Semantically they behave exactly the same way, as the "end" of a void method is an implicit return.

Now, it is also possible to put a return; in a conditional block (if, for, while, etc...) where it might exit the method early. For example:

void someMethod() {
   if (this.avoidSomething) {
       return;
   }
   System.out.println("Something not avoided.");
}