<s>
JavaCC	B-Language
(	O
Java	B-Language
Compiler	I-Language
Compiler	I-Language
)	O
is	O
an	O
open-source	B-Application
parser	B-Language
generator	I-Language
and	O
lexical	B-Application
analyzer	I-Application
generator	O
written	O
in	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
JavaCC	B-Language
is	O
similar	O
to	O
yacc	B-Application
in	O
that	O
it	O
generates	O
a	O
parser	B-Language
from	O
a	O
formal	O
grammar	O
written	O
in	O
EBNF	O
notation	O
.	O
</s>
<s>
Unlike	O
yacc	B-Application
,	O
however	O
,	O
JavaCC	B-Language
generates	O
top-down	O
parsers	B-Language
.	O
</s>
<s>
JavaCC	B-Language
can	O
resolve	O
choices	O
based	O
on	O
the	O
next	O
k	O
input	O
tokens	O
,	O
and	O
so	O
can	O
handle	O
LL(k )	O
grammars	O
automatically	O
;	O
by	O
use	O
of	O
"	O
lookahead	O
specifications	O
"	O
,	O
it	O
can	O
also	O
resolve	O
choices	O
requiring	O
unbounded	O
look	O
ahead	O
.	O
</s>
<s>
JavaCC	B-Language
also	O
generates	O
lexical	B-Application
analyzers	I-Application
in	O
a	O
fashion	O
similar	O
to	O
lex	B-General_Concept
.	O
</s>
<s>
The	O
tree	O
builder	O
that	O
accompanies	O
it	O
,	O
JJTree	B-Language
,	O
constructs	O
its	O
trees	O
from	O
the	O
bottom	O
up	O
.	O
</s>
<s>
JavaCC	B-Language
is	O
licensed	O
under	O
a	O
BSD	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
In	O
1996	O
,	O
Sun	O
Microsystems	O
released	O
a	O
parser	B-Language
generator	I-Language
called	O
Jack	O
.	O
</s>
<s>
The	O
developers	O
responsible	O
for	O
Jack	O
created	O
their	O
own	O
company	O
called	O
Metamata	O
and	O
changed	O
the	O
Jack	O
name	O
to	O
JavaCC	B-Language
.	O
</s>
<s>
After	O
WebGain	O
shut	O
down	O
its	O
operations	O
,	O
JavaCC	B-Language
was	O
moved	O
to	O
its	O
current	O
home	O
.	O
</s>
<s>
Software	O
built	O
using	O
JavaCC	B-Language
includes	O
:	O
</s>
