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<html><head><title>FindBugs Bug Descriptions (Unabridged)</title><link rel="stylesheet" type="text/css" href="findbugs.css"/><link rel="shortcut icon" href="favicon.ico" type="image/x-icon"/></head><body><table width="100%"><tr><td bgcolor="#b9b9fe" valign="top" align="left" width="20%"> <table width="100%" cellspacing="0" border="0"> <tr><td><a class="sidebar" href="index.html"><img src="umdFindbugs.png" alt="FindBugs"></a></td></tr> <tr><td> </td></tr><tr><td><b>Docs and Info</b></td></tr> <tr><td><font size="-1"><a class="sidebar" href="demo.html">Demo and data</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="users.html">Users and supporters</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="http://findbugs.blogspot.com/">FindBugs blog</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="factSheet.html">Fact sheet</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="manual/index.html">Manual</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="ja/manual/index.html">Manual(ja/日本語)</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="FAQ.html">FAQ</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="bugDescriptions.html">Bug descriptions</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="mailingLists.html">Mailing lists</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="publications.html">Documents and Publications</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="links.html">Links</a></font></td></tr> <tr><td> </td></tr><tr><td><a class="sidebar" href="downloads.html"><b>Downloads</b></a></td></tr> <tr><td> </td></tr><tr><td><a class="sidebar" href="http://www.cafeshops.com/findbugs"><b>FindBugs Swag</b></a></td></tr><tr><td> </td></tr><tr><td><b>Development</b></td></tr> <tr><td><font size="-1"><a class="sidebar" href="http://sourceforge.net/tracker/?group_id=96405">Open bugs</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="reportingBugs.html">Reporting bugs</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="contributing.html">Contributing</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="team.html">Dev team</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="api/index.html">API</a> <a class="sidebar" href="api/overview-summary.html">[no frames]</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="Changes.html">Change log</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="http://sourceforge.net/projects/findbugs">SF project page</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="http://code.google.com/p/findbugs/source/browse/">Browse source</a></font></td></tr> <tr><td><font size="-1"><a class="sidebar" href="http://code.google.com/p/findbugs/source/list">Latest code changes</a></font></td></tr> </table> </td><td align="left" valign="top"><h1>FindBugs Bug Descriptions (Unabridged)</h1><p>This document lists all of the bug patterns reported by thelatest development version of <a href="http://findbugs.sourceforge.net">FindBugs</a>. Note that this may includebug patterns not available in any released version of FindBugs,as well as bug patterns that are not enabled by default.<h2>Summary</h2><table width="100%"><tr bgcolor="#b9b9fe"><th>Description</th><th>Category</th></tr><tr bgcolor="#eeeeee"><td><a href="#AM_CREATES_EMPTY_JAR_FILE_ENTRY">AM: Creates an empty jar file entry</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#AM_CREATES_EMPTY_ZIP_FILE_ENTRY">AM: Creates an empty zip file entry</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#BC_EQUALS_METHOD_SHOULD_WORK_FOR_ALL_OBJECTS">BC: Equals method should not assume anything about the type of its argument</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#DMI_RANDOM_USED_ONLY_ONCE">BC: Random object created and used only once</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#BIT_SIGNED_CHECK">BIT: Check for sign of bitwise operation</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#CN_IDIOM">CN: Class implements Cloneable but does not define or use clone method</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#CN_IDIOM_NO_SUPER_CALL">CN: clone method does not call super.clone()</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#CN_IMPLEMENTS_CLONE_BUT_NOT_CLONEABLE">CN: Class defines clone() but doesn't implement Cloneable</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#CO_ABSTRACT_SELF">Co: Abstract class defines covariant compareTo() method</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#CO_SELF_NO_OBJECT">Co: Covariant compareTo() method defined</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#DE_MIGHT_DROP">DE: Method might drop exception</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#DE_MIGHT_IGNORE">DE: Method might ignore exception</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#DP_CREATE_CLASSLOADER_INSIDE_DO_PRIVILEGED">DP: Classloaders should only be created inside doPrivileged block</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#DP_DO_INSIDE_DO_PRIVILEGED">DP: Method invoked that should be only be invoked inside a doPrivileged block</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#DM_EXIT">Dm: Method invokes System.exit(...)</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#DM_RUN_FINALIZERS_ON_EXIT">Dm: Method invokes dangerous method runFinalizersOnExit</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#ES_COMPARING_PARAMETER_STRING_WITH_EQ">ES: Comparison of String parameter using == or !=</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#ES_COMPARING_STRINGS_WITH_EQ">ES: Comparison of String objects using == or !=</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#EQ_ABSTRACT_SELF">Eq: Abstract class defines covariant equals() method</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#EQ_CHECK_FOR_OPERAND_NOT_COMPATIBLE_WITH_THIS">Eq: Equals checks for noncompatible operand</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#EQ_COMPARETO_USE_OBJECT_EQUALS">Eq: Class defines compareTo(...) and uses Object.equals()</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#EQ_GETCLASS_AND_CLASS_CONSTANT">Eq: equals method fails for subtypes</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#EQ_SELF_NO_OBJECT">Eq: Covariant equals() method defined</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#FI_EMPTY">FI: Empty finalizer should be deleted</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#FI_EXPLICIT_INVOCATION">FI: Explicit invocation of finalizer</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#FI_FINALIZER_NULLS_FIELDS">FI: Finalizer nulls fields</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#FI_FINALIZER_ONLY_NULLS_FIELDS">FI: Finalizer only nulls fields</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#FI_MISSING_SUPER_CALL">FI: Finalizer does not call superclass finalizer</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#FI_NULLIFY_SUPER">FI: Finalizer nullifies superclass finalizer</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#FI_USELESS">FI: Finalizer does nothing but call superclass finalizer</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#GC_UNCHECKED_TYPE_IN_GENERIC_CALL">GC: Unchecked type in generic call</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#HE_EQUALS_NO_HASHCODE">HE: Class defines equals() but not hashCode()</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#HE_EQUALS_USE_HASHCODE">HE: Class defines equals() and uses Object.hashCode()</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#HE_HASHCODE_NO_EQUALS">HE: Class defines hashCode() but not equals()</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#HE_HASHCODE_USE_OBJECT_EQUALS">HE: Class defines hashCode() and uses Object.equals()</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#HE_INHERITS_EQUALS_USE_HASHCODE">HE: Class inherits equals() and uses Object.hashCode()</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#IC_SUPERCLASS_USES_SUBCLASS_DURING_INITIALIZATION">IC: Superclass uses subclass during initialization</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#IMSE_DONT_CATCH_IMSE">IMSE: Dubious catching of IllegalMonitorStateException</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#ISC_INSTANTIATE_STATIC_CLASS">ISC: Needless instantiation of class that only supplies static methods</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#IT_NO_SUCH_ELEMENT">It: Iterator next() method can't throw NoSuchElementException</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#J2EE_STORE_OF_NON_SERIALIZABLE_OBJECT_INTO_SESSION">J2EE: Store of non serializable object into HttpSession</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#JCIP_FIELD_ISNT_FINAL_IN_IMMUTABLE_CLASS">JCIP: Fields of immutable classes should be final</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NP_BOOLEAN_RETURN_NULL">NP: Method with Boolean return type returns explicit null</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#NP_CLONE_COULD_RETURN_NULL">NP: Clone method may return null</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NP_EQUALS_SHOULD_HANDLE_NULL_ARGUMENT">NP: equals() method does not check for null argument</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#NP_TOSTRING_COULD_RETURN_NULL">NP: toString method may return null</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NM_CLASS_NAMING_CONVENTION">Nm: Class names should start with an upper case letter</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#NM_CLASS_NOT_EXCEPTION">Nm: Class is not derived from an Exception, even though it is named as such</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NM_CONFUSING">Nm: Confusing method names</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#NM_FIELD_NAMING_CONVENTION">Nm: Field names should start with a lower case letter</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NM_FUTURE_KEYWORD_USED_AS_IDENTIFIER">Nm: Use of identifier that is a keyword in later versions of Java</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#NM_FUTURE_KEYWORD_USED_AS_MEMBER_IDENTIFIER">Nm: Use of identifier that is a keyword in later versions of Java</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NM_METHOD_NAMING_CONVENTION">Nm: Method names should start with a lower case letter</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#NM_SAME_SIMPLE_NAME_AS_INTERFACE">Nm: Class names shouldn't shadow simple name of implemented interface</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NM_SAME_SIMPLE_NAME_AS_SUPERCLASS">Nm: Class names shouldn't shadow simple name of superclass</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#NM_VERY_CONFUSING_INTENTIONAL">Nm: Very confusing method names (but perhaps intentional)</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#NM_WRONG_PACKAGE_INTENTIONAL">Nm: Method doesn't override method in superclass due to wrong package for parameter</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#ODR_OPEN_DATABASE_RESOURCE">ODR: Method may fail to close database resource</a></td><td>Bad practice</td></tr><tr bgcolor="#eeeeee"><td><a href="#ODR_OPEN_DATABASE_RESOURCE_EXCEPTION_PATH">ODR: Method may fail to close database resource on exception</a></td><td>Bad practice</td></tr><tr bgcolor="#ffffff"><td><a href="#OS_OPEN_STREAM">OS: Method may fail to close stream</a></td><td>Bad practice</td></tr>?? 快捷鍵說明
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