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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.util.Properties.save()`	`java.util.Properties.store()`
`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 The external features JVM Profiler Interface (JVMPI) and JVM Debug Interface (JVMDI) are also deprecated and have been replaced by the JVM Tool Interface (JVMTI), see rule ENV05-J. Do not deploy an application that can be remotely monitored for more information.

Risk Assessment

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

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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="2260b4ae2ebfb712-f2860e11-46a44f2b-90849b14-9770232e11b7164899f6d1d2"><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="1b49a73a0297b916-ce554890-45b643ac-a2a984cf-6636b07ddd2d4b206df410b7"><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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