Re: silly Math question from Fortran programmer

From:

Lew <lew@lewscanon.com>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 03 Jan 2008 10:26:04 -0500

Message-ID:

<69WdnahngP8RY-HanZ2dnUVZ_tKinZ2d@comcast.com>

Stefan Ram wrote:

"Daniel Dyer" <"You don't need it"> writes:

I have import java.lang.Math ; at the beginning of my program.

This is not necessary, since the classes of the java.lang package are
imported implicitly.

  If there is a class ?Math? (a file ?Math.class?) in the class
  path (in an unnamed package), an import declaration ?import
  java.lang.Math;? at the start of another compilation unit will
  make ?Math? refer to ?java.lang.Math? in that compilation unit.

  Also, the compilation of the compilation unit
  ?import java.lang.Math; class Math {}? will report an error.
  But it will compile without the import declaration.

While this is true, these pathological situations are avoided by *not using
the unnamed package*.

A conflict between (unnamed-package) Math and java.lang.Math is a deployment
problem, not a programming problem. There had better not be *any* classes in
the unnamed package in the classpath, much less ones with the same names as
standard API classes.

Go ahead and omit "java.lang." from your programs, kiddies.

Spank whoever turns that into a problem for you.

--
Lew