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Editorial Team
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Asked: 2026-05-22T15:54:31+00:00

Recently some of my users have been reporting problems with NullPointers. Thanks to one

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Recently some of my users have been reporting problems with NullPointers. Thanks to one of them, I have managed to find out that my application can’t find the Javascript engine that should theoretically come with the JRE (most of them have the JDK anyway).

How can they manually install the scripting engine?

Thanks in advance…

P.S. Most of these people have OpenJDK. However, this doesn’t happen to me (I am also an OpenJDK user)…
EDIT: They have at least version 1.5, most of them have 1.6.

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1 Answer

  1. Editorial Team

    From JSR 270 (the Java 6 SE spec):

    There will be no requirement that any
    particular scripting language be
    supported by the platform;
    implementors may choose to include
    support for the scripting language(s)
    of their choice as they see fit.

    So, it is conceivable that there are JREs out there without JavaScript support. There may also be variations in engine names, language names and versions bundled. “JavaScript” is an Oracle trademark so some vendors might be reluctant to use it as an identifier string.

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