Does Java have something like C#'s ref and out keywords?

Question

Something like the following:

ref example:

void changeString(ref String str) {
    str = \"def\";
}

void main() {
    String abc = \"abc\";
    chan         


        

Answer 1

Direct answer: No

But you can simulate reference with wrappers.

And do the following:

void changeString( _ str ) {
    str.s("def");
}

void testRef() {
     _ abc = new _("abc");
     changeString( abc );
     out.println( abc ); // prints def
}

Out

void setString( _ ref ) {
    str.s( "def" );
}
void testOut(){
    _ abc = _();
    setString( abc );
    out.println(abc); // prints def
}

And basically any other type such as:

_ one = new (1);
addOneTo( one );

out.println( one ); // May print 2