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            Never use deprecated fields, methods, or classes in new code. The Java SE 6 documentation provides a [complete list|http://download.oracle.com/javase/6/docs/api/deprecated-list.html] of deprecated APIs \[[API 2006|AA. Bibliography#API 06]\]. Java provides a {{@deprecated}} annotation to indicate the deprecation of specific fields, methods, and classes.  For instance, many methods of {{java.util.Date}}, such as {{Date.getYear()}}, have been explicitly deprecated.  The rule [THI05-J. Do not use Thread.stop() to terminate threads|THI05-J. Do not use Thread.stop() to terminate threads] describes issues that can result from using the deprecated {{Thread.stop()}} method.

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The following methods and classes must not be used ¹:

Class or Method	Replacement	Rule
`java.lang.Character.isJavaLetter()`	`java.lang.Character.isJavaIdentifierStart()`
`java.lang.Character.isJavaLetterOrDigit()`	`java.lang.Character.isJavaIdentifierPart()`
`java.lang.Character.isSpace()`	`java.lang.Character.isWhitespace()`
`java.lang.reflect.Class.newInstance()`	`java.lang.reflect.Constructor.newInstance()`	ERR06-J. Do not let code throw undeclared checked exceptions
`java.util.Date` (many methods)	`java.util.Calendar`
`java.util.Dictionary`	`java.util.Map<K,V>`
`java.lang.Runtime.runFinalizersOnExit()`	inherently unsafe	MET12-J. Do not use finalizers
`java.lang.System.runFinalizersOnExit()`	inherently unsafe	MET12-J. Do not use finalizers
`java.util.Properties.save()`	`java.util.Properties.store()`
`java.lang.Thread.destroy()`	inherently unsafe	LCK07-J. Avoid deadlock by requesting and releasing locks in the same order
`java.lang.Thread.stop()`	`java.lang.Thread.interrupt()`	THI05-J. Do not use Thread.stop() to terminate threads
`java.lang.ThreadGroup` (many methods)	inherently unsafe	THI01-J. Do not invoke ThreadGroup methods

_{1. The external features JVM Profiler Interface (JVMPI) and JVM Debug Interface (JVMDI)}

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_{are deprecated and have been replaced by the JVM Tool Interface (JVMTI)}

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_{, see rule ENV05-J. Do not deploy an application that can be remotely monitored}

Risk Assessment

Using deprecated or obsolete classes or methods in program code can lead to erroneous behavior.

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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="1bd57475019bae17-6d6c1067-452a4a72-83ee92f6-03f85d055c39a1e60917638c"><ac:plain-text-body><![CDATA[	[ISO/IEC TR 24772:2010	http://www.aitcnet.org/isai/]	"Deprecated Language Features [MEM]"	]]></ac:plain-text-body></ac:structured-macro>
MITRE CWE	CWE ID 589, "Call to Non-ubiquitous API"

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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="280c5f198363a4e2-a65ffe81-492c4364-bb9d89a8-e1543520ced2302f6a6559a4"><ac:plain-text-body><![CDATA[	[[API 2006	AA. Bibliography#API 06]]	[Deprecated API	http://java.sun.com/javase/6/docs/api/deprecated-list.html], [Dictionary	http://download.oracle.com/javase/6/docs/api/java/util/Dictionary.html]	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="6eaf735292825e5e-17b4ab18-478a4828-98bd9391-35da1588d4eaa0f02d3c95ce"><ac:plain-text-body><![CDATA[	[[SDN 2008	AA. Bibliography#SDN 08]]	Bug database, [Bug ID 4264153	http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4264153]	]]></ac:plain-text-body></ac:structured-macro>

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