1 ProfessorJ Beginner

Program

=

Import ... Def ...

Import

=

import Name ; import Name.* ;

Def

=

class Id {Member Member ...} class Id implements Id {Member Member ...} interface Id {Signature ...}

Signature

=

Type Id (Type Id ,...) ;

Member

=

Field Method Constructor

Field

=

Type Id = Expression ; Type Id ;

Method

=

Type Id (Type Id ,...) {Statement}

Constructor

=

Id (Type Id ,...) {Init ...}

Init

=

this.Id = Id ;

Statement

=

if (Expression) {Statement} else {Statement} return Expression ;

Expression

=

Expression Op Expression - Expression ! Expression this Expression.Id (Expression ,...) Expression.Id new Id (Expression ,...) check Expression expect Expression check Expression expect Expression within Expression (Expression) Id Number Character String true false

Name

=

Id. ... Id

Op

=

+ - * / < <= == > >= && ||

Type

=

Id boolean int char double float long byte short

An Id is a sequence of alphanumeric characters, _, and $.