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The Integer class is only guaranteed to cache integer values from -128 to 127 to 128, which can result in equivalent values outside this range comparing as unequal when tested using the equality operators. For example, a JVM that did not cache any other values when running this program would output
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="6a444d97b2561c60-e2222620-408d477b-85ebb77e-64103bd21e5676b8b15ed79f"><ac:plain-text-body><![CDATA[ | [[Bloch 2009 | AA. Bibliography#Bloch 09]] | 4. "Searching for the One" | ]]></ac:plain-text-body></ac:structured-macro> | |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="20835fd40af0fd3e-3d37de54-41c14f36-9be39211-e584f53b47ef72d0abc156e7"><ac:plain-text-body><![CDATA[ | [[JLS 2005 | AA. Bibliography#JLS 05]] | [§5.1.7, "Boxing Conversion" | http://java.sun.com/docs/books/jls/third_edition/html/conversions.html#5.1.7] | ]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="2c218bbac5b697c7-7bb02d93-4f4b449f-8a839dea-4dced9d60c9c45ae09594b36"><ac:plain-text-body><![CDATA[ | [[Pugh 2009 | AA. Bibliography#Pugh 09]] | Using == to compare objects rather than .equals | ]]></ac:plain-text-body></ac:structured-macro> |
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