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  1. Maven Compiler Plugin
  2. MCOMPILER-228

cannot assign a value to final variable in lamda

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Details

    • Bug
    • Status: Closed
    • Minor
    • Resolution: Not A Problem
    • 3.1
    • None
    • None
    • Windows 7 64 bit, Maven 3.2.2, JDK 64 bit 8u5

    Description

      Code example compiles in Eclipse, but not with Maven Compiler Plugin. Code is like below (inside a lamda expression)

      final x;
if (some condition)
x = a;
else if (some other condition)
x = b;
else 
x = c;

      See attached example source.

      [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project MediaIndexer: Compilation failure: Compilation failure:
[ERROR] /C:/MAPS/MediaIndexer/src/main/java/example/FinalExample.java:[11,13] cannot assign a value to final variable compareTo
[ERROR] /C:/MAPS/MediaIndexer/src/main/java/example/FinalExample.java:[14,13] cannot assign a value to final variable compareTo
[ERROR] /C:/MAPS/MediaIndexer/src/main/java/example/FinalExample.java:[17,13] cannot assign a value to final variable compareTo

      The workaround is to remove final for the variable and just ensure that the value is assigned in each code path.

      Attachments

        1. MCOMPILER-228.patch
          2 kB
          Robert Scholte
        2. FinalExample.java
          0.6 kB
          Robert Kish

        Issue Links

          is related to

          Task - A task that needs to be done. MNG-5551 check that everything compile and run fine with Java 8

          • Major - Major loss of function.
          • Closed

          Activity

            People

              rfscholte Robert Scholte
              rmkish Robert Kish
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              Dates

                Created:
                Updated:
                Resolved: