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JavaObjectQ—Wolfram Documentation

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JavaObjectQ[expr]

gives True if expr is a reference to a Java object or Null, and gives False otherwise.

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JavaObjectQ

JavaObjectQ[expr]

gives True if expr is a reference to a Java object or Null, and gives False otherwise.

Details and Options

Wolfram Research (2007), JavaObjectQ, Wolfram Language function, https://reference.wolfram.com/language/JLink/ref/JavaObjectQ.html.

Text

Wolfram Research (2007), JavaObjectQ, Wolfram Language function, https://reference.wolfram.com/language/JLink/ref/JavaObjectQ.html.

CMS

Wolfram Language. 2007. "JavaObjectQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/JLink/ref/JavaObjectQ.html.

APA

Wolfram Language. (2007). JavaObjectQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/JLink/ref/JavaObjectQ.html

BibTeX

@misc{reference.wolfram_2026_javaobjectq, author="Wolfram Research", title="{JavaObjectQ}", year="2007", howpublished="\url{https://reference.wolfram.com/language/JLink/ref/JavaObjectQ.html}", note=[Accessed: 14-November-2026]}

BibLaTeX

@online{reference.wolfram_2026_javaobjectq, organization={Wolfram Research}, title={JavaObjectQ}, year={2007}, url={https://reference.wolfram.com/language/JLink/ref/JavaObjectQ.html}, note=[Accessed: 14-November-2026]}