java - OpenCV for Android : Illegal Forward Reference -

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i using opencv project , works fine except descriptorextractor.java. gives me following error every day:

/opencv/src/org/opencv/features2d/descriptorextractor.java error:(26, 29) error: illegal forward reference error:(27, 29) error: illegal forward reference error:(28, 28) error: illegal forward reference error:(29, 30) error: illegal forward reference error:(30, 30) error: illegal forward reference error:(31, 30) error: illegal forward reference error:(32, 30) error: illegal forward reference

the file this:

public class descriptorextractor {      public static final int             sift = 1,             surf = 2,             orb = 3,             brief = 4,             brisk = 5,             freak = 6,             akaze = 7,             opponent_sift = opponentextractor + sift,             opponent_surf = opponentextractor + surf,             opponent_orb = opponentextractor + orb,             opponent_brief = opponentextractor + brief,             opponent_brisk = opponentextractor + brisk,             opponent_freak = opponentextractor + freak,             opponent_akaze = opponentextractor + akaze;     private static final int             opponentextractor = 1000;     protected final long nativeobj;

everyday moving decleration of opponentextractor top of class , problem goes away. next day class reverts original. on top of class there comment

// // file auto-generated. please don't modify it! //

what should do? how prevent this?

update:

i using opencv android 3.0 , java 7.80


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