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Editorial Team
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Asked: 2026-05-12T11:33:22+00:00

In most modern IDEs there is a parameter that you can set to ensure

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In most modern IDEs there is a parameter that you can set to ensure javac gets enough heap memory to do its compilation. For reasons that are not worth going into here, we are tied for the time being to JBuilder 2005/2006, and it appears the amount of source code has exceeded what can be handled by javac.

Please keep the answer specific to JBuilder 2005/2006 javac (we cannot migrate away right now, and the Borland Make compiler does not correctly support Java 1.6)

I realize how and what parameters should be passed to javac, the problem is the IDE doesn’t seem to allow these to be set anywhere. A lot of configuration is hidden down in the Jbuilder Install\bin*.config files, I feel the answer may be in there somewhere, but have not found it.

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  1. Editorial Team

    did you find a good solution for that problem?

    I have the same problem and the only solution I found is the following:
    The environment variable JAVA_TOOL_OPTIONS can be used to provide parameters for the JVM.

    http://java.sun.com/javase/6/docs/platform/jvmti/jvmti.html#tooloptions

    I have created a batch file “JBuilderw.bat” with the following content:

    set JAVA_TOOL_OPTIONS=-Xmx256m

    JBuilderw.exe

    Each time I start JBuilder using this batch file the env.var. JAVA_TOOL_OPTIONS will be set and javac.exe will receive the setting.
    The JVM displays at the end the following message: “Picked up JAVA_TOOL_OPTIONS: -Xmx256m”

    Drawback: all virtual machines started by JBuilder will get that setting. 🙁

    Thanks,
    JB

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