Re: Perl Pro but Java Newbie: Need nudge in proper direction for
my favorite Perl routine in Java
/usr/ceo wrote:
I'm thinking that the "compile"-phase of Java is what resolves the
different objects in your example above. My "approach" moves it from
compile to runtime. So it seems.
I'm getting out of my depth here but I think the answer is yes. The
Java compiler has a few tricks it can do to save typing. That var-arg
statement is one -- it's just implemented with arrays at runtime. Same
with enum, which in Java are just a shorthand class declaration.
Java concatenation is shorthand for invoking a string builder object.
StringBuilder sb = new StringBuilder();
sb.add( "Hi there! Here's my object: " );
sb.add( object );
sb.add( "/nand here is my string: " );
sb.add( string );
sb.add( "/nHave a nice day!" );
System.out.println( sb.toString() );
So the plus-sign is substituting for a full method call. I don't know
if the Java compiler will spot string literal concatenation and make
separate string literals into a single string literal.
There might be a few other cases where the compiler will implicitly call
"new" for you. Autoboxing comes to mind. I can't think of any others
right now in addition to the aforementioned enums and var-agrs.
BTW, if you take NetBeans for a test drive, be sure to use a recent
version. I think 6.1 is the most recent. Lots of nice improvements in
recent months.