jlint(1) User Contributed Documentation jlint(1)NAMEjlint.sh - Java program checker
SYNOPSISjlint.sh [options] file.class ...
DESCRIPTION
Check Java code and detect inconsistencies and synchronization problems
by doing data flow analysis and building a lock graph.
Jlint consists of two separate programs performing syntax and semantic
verification. As far as Java mostly inherits C/C++ syntax and so
inherits most of the problems caused by C syntax, the idea was to
create common syntax verifier for all C-family languages: C, C++,
Objective C and Java. This program was named "antic" because it fixes
problems with C grammar, which can cause dangerous programmer's bugs,
undetected by compiler. By using hand-written scanner and simple top-
down parser, AntiC is able to detect such bugs as suspicious use of
operators priorities, absence of break in switch code, wrong assumption
about constructions bodies.
There are three main groups of messages from Jlint:
synchronization, inheritance
data flow
These groups are distinguished by kind of analysis which is used to
detect problems, reported in this messages. Each group is in turn
divided into several categories, which contains one or more messages.
Such scheme of message classification is used to support fine-grained
selection of reported messages.
Because only categories of message can be disabled, but not separate
messages, a short shell <jlint.sh> script is supplied that will
suppress certain warnings that are less important. It should be noted
that it will ignore any race conditions for variables. This is because
Jlint does not have any notion of "shared reading", so it usually
produces too many warnings about such data races to be useful. For some
projects, using Jlint's output unfiltered can still be useful.
Full manual is at /usr/share/doc/jlint/manual.html
OPTIONS-history FILE
Use history file to avoid repeated messages.
-message_code
Increase or decrease information about concrete messages. Use [+-]
as options prefix.
-message_category
Include or exclude categories of messages to be reported. Use [+-]
as options prefix. Message categories:
synchronization : detect synchronizational problems
deadlock : possible deadlock detection
race_condition : possible race condition detection
wait_nosync : wait or notify is called from non-synchronized method
inheritance : detect problems with class/interface inheritance
super_finalize : super.finalize() is not called from finalize method
not_overridden : methods with the same names and different profiles
field_redefined : instance or static variable is redefined in derived class
shadow_local : local variable shadows one in exterior scope
data_flow : perform data flow analysis to detect suspicious operations
null_reference : detect access to variables with possible NULL value
zero_operand : one of the operands of a binary integer operation is zero
zero_result : result of operation is always zero
redundant : operation always produces the same result
overflow : detect incorrect handling of operation overflow
incomp_case : switch case label can't be produced by switch expression
short_char_cmp : expression of char type is compared with one of short type
string_cmp : two strings are compared as object references
weak_cmp : using of inequality comparison where equality can be checked
domain : operands doesn't belong to the domain of operator
truncation : data can be lost as a result of type conversion
bounds : array index or length is out of range
done : notification about verification completion
all : produce messages of all categories
-max_shown_paths NUMBER
Max. shown paths between two sync. methods.
-source DIR
Path to directory with *.java files.
-verbose
Increase or decrease information about program activity. Use [+-]
as options prefix.
-help
Display short help.
ENVIRONMENT
None.
FILES
None.
SEE ALSOantic(1)AUTHORS
This manual page was written by Jari Aalto <jari.aalto@cante.net>.
Released under license GNU GPL version 2 or (at your option) any later
version. For more information about the license, visit
<http://www.gnu.org/copyleft/gpl.html>.
2012-09-27 jlint(1)
