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Editorial Team
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Asked: 2026-05-31T18:53:52+00:00

For the same code, Eclipse shows warnings about unused variables, but compiling with javac

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For the same code, Eclipse shows warnings about unused variables, but compiling with “javac” (v1.6) does not. Does Eclipse use a different compiler or parser? How can I get javac to show the same warnings?

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1 Answer

  1. Editorial Team

    Quote from JDT core (Eclipse’s editor infrastructure)

    JDT Core is the Java infrastructure of the Java IDE. It includes:

    An incremental Java compiler. Implemented as an Eclipse builder, it is based on technology evolved from VisualAge for Java compiler. In
    particular, it allows to run and debug code which still contains
    unresolved errors.

    It is the incremental Java compiler that shows the warning.

    There are no ways to enable that warning in Sun/Oracle javac

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