JSR 400 (Java SE 25): JEP Proposed to Target: 513: Flexible Constructor Bodies

Iris Clark iris.clark at oracle.com
Tue Apr 29 21:07:44 UTC 2025


The following JEP with scope "SE" has been proposed to target JDK 25:

    513: Flexible Constructor Bodies
         https://openjdk.org/jeps/513

    Summary: In the body of a constructor, allow statements to appear
    before an explicit constructor invocation, i.e., super(...) or
    this(...).  Such statements cannot reference the object under
    construction, but they can initialize its fields and perform other safe
    computations.  This change allows many constructors to be expressed
    more naturally.  It also allows fields to be initialized before they
    become visible to other code in the class, such as methods called from
    a superclass constructor, thereby improving safety.

The announced deadline for feedback to jdk-dev is Tue 6 May 21:00 UTC:

    https://mail.openjdk.org/pipermail/jdk-dev/2025-April/010021.html

If there are no unresolved objections at that time, then the JEP will be moved
to the Targeted state, indicating that the feature is expected to appear in
the specified release of the JDK Project.  For more information about states,
see the JEP Process document:

    https://openjdk.org/jeps/1

A dashboard that lists JEPs with "SE" scope may be found via a link on this
page:

    https://openjdk.org/projects/jdk/25/spec/

Thanks,
Iris


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