Missing slf4j in tess4j

Question

I want to test tess4j to do OCR. I used the following tutorial for a first example: http://tess4j.sourceforge.net/codesample.html I included the required libraries, but I am getting the following error:

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
    at net.sourceforge.tess4j.Tesseract.<clinit>(Unknown Source)
    at tess4jexample.TesseractExample.main(TesseractExample.java:10)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 2 more

Does anyone knows a solution for this?

score 2 · Answer 1 · answered Apr 27 '16 at 00:00

2

Tess4J has several dependencies. You'll need to include them in the classpath.

answered Apr 27 '16 at 00:00

nguyenq

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Yes, I got all these dependencies included. I still get the same error. – pexmar Apr 28 '16 at 10:05

score 1 · Accepted Answer · answered Apr 28 '16 at 10:15

1

There has where still some dependencies missing, which have not been mentioned on the mavenrepository:

logback-core-1.1.6.jar
slf4j-api-1.7.21.jar

I think now it is working :-) Thank you nguyenq for this hint, to check the dependencies.

answered Apr 28 '16 at 10:15

pexmar

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Missing slf4j in tess4j

2 Answers2