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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="60f1be5312479c63-60af89ea-45b94b2d-897b99c4-dd0d97eaf339bc577a50cff6"><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="5ebd84ce740ffe1b-63750039-440340d0-936cb824-809b1d508d018b39321bf07a"><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="803ab2abf0809b29-cad96d4f-42034792-8485b86c-ac5c9c559da4d5c6f4fbba31"><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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