bytedeco/javacv

compiling sample FaceApplet: error: cannot find symbol

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#2344 opened on Jul 24, 2025

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 (1 comment) (0 reactions) (0 assignees)Java (6,985 stars) (1,583 forks)batch import
enhancementhelp wanted

Description

FaceApplet.java:50: error: cannot find symbol classifier = new CvHaarClassifierCascade(cvLoad(classifierFile.getAbsolutePath())); ^ symbol: method cvLoad(String) location: class FaceApplet

FaceApplet.java:101: error: cannot find symbol CV_HAAR_FIND_BIGGEST_OBJECT | CV_HAAR_DO_ROUGH_SEARCH); ^ symbol: variable CV_HAAR_FIND_BIGGEST_OBJECT location: class FaceApplet

FaceApplet.java:101: error: cannot find symbol CV_HAAR_FIND_BIGGEST_OBJECT | CV_HAAR_DO_ROUGH_SEARCH); ^ symbol: variable CV_HAAR_DO_ROUGH_SEARCH location: class FaceApplet

Contributor guide

Tech stack
java
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Java programmingFamiliarity with JavaCV
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Examine the JavaCV API for replacements of cvLoad and the constants CV HAAR FIND BIGGEST OBJECT and CV HAAR DO ROUGH SEARCH. Check the repository's examples or the OpenCV migration documentation. The affected file is FaceApplet.java. The goal is to update the code to compile with the current version of JavaCV.