Difference between `foo()` and `foo(void)`

Question

In Java, is there any difference between this two function declarations?

public void foo() {/*...*/}

public void foo(void) {/*...*/}

Here you can find the answear to this question but for C/C++ . In these languages it makes totally sense the existance of both declaration styles.

But what is the point of this in Java ?

Answer 1

The latter declaration illegal in Java. You can't declare a method like that. You should get an error like this:

Test.java:8: error: <identifier> expected
    public void foo(void) {/*...*/}
                        ^
1 error

So not only is there no point - you simply won't find valid code which attempts to use this style.

Answer 2

你可以试试

public void foo(Void v) {/*...*/}