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JavaBlock—Wolfram Documentation

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JavaBlock[expr]

causes all new Java objects returned to the Wolfram Language during the evaluation of expr to be released when expr finishes. It is an error to refer to such an object after JavaBlock ends.

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JLink`
JLink`

JavaBlock

JavaBlock[expr]

causes all new Java objects returned to the Wolfram Language during the evaluation of expr to be released when expr finishes. It is an error to refer to such an object after JavaBlock ends.

Details and Options

  • To use JavaBlock, you first need to load J/Link using Needs["JLink`"].
  • JavaBlock is a way to mark a set of objects as temporary so they can be automatically cleaned up when the block of code ends.
  • JavaBlock affects only new objects, not additional references to ones that have previously been seen.
  • If a JavaBlock returns a single JavaObject as a result, that object will not be released.
Wolfram Research (2007), JavaBlock, Wolfram Language function, https://reference.wolfram.com/language/JLink/ref/JavaBlock.html.

Text

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

CMS

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

APA

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

BibTeX

@misc{reference.wolfram_2026_javablock, author="Wolfram Research", title="{JavaBlock}", year="2007", howpublished="\url{https://reference.wolfram.com/language/JLink/ref/JavaBlock.html}", note=[Accessed: 14-November-2026]}

BibLaTeX

@online{reference.wolfram_2026_javablock, organization={Wolfram Research}, title={JavaBlock}, year={2007}, url={https://reference.wolfram.com/language/JLink/ref/JavaBlock.html}, note=[Accessed: 14-November-2026]}