why guava:31.0.1-android?

[GGintama]

implementation("org.languagetool:language-en:5.9")

uesd in my gradle project (java8 ) ,it run errors.

Exception in thread "main" java.lang.IncompatibleClassChangeError: Class com.google.common.base.Suppliers$SupplierOfInstance does not implement the requested interface java.util.function.Supplier
at org.languagetool.rules.RuleMatch.getSuggestedReplacementObjects(RuleMatch.java:405)
at org.languagetool.JLanguageTool$TextCheckCallable.getTextLevelRuleMatches(JLanguageTool.java:1953)
at org.languagetool.JLanguageTool$TextCheckCallable.call(JLanguageTool.java:1905)
at org.languagetool.JLanguageTool$TextCheckCallable.call(JLanguageTool.java:1877)
at org.languagetool.JLanguageTool.performCheck(JLanguageTool.java:1338)
at org.languagetool.JLanguageTool.checkInternal(JLanguageTool.java:1016)
at org.languagetool.JLanguageTool.check(JLanguageTool.java:935)
at org.languagetool.JLanguageTool.check(JLanguageTool.java:920)
at org.languagetool.JLanguageTool.check(JLanguageTool.java:910)
at org.languagetool.JLanguageTool.check(JLanguageTool.java:892)
at org.languagetool.JLanguageTool.check(JLanguageTool.java:849)
at org.languagetool.JLanguageTool.check(JLanguageTool.java:833)
at TestMainClass.check(TestMainClass.java:27)
at TestMainClass.main(TestMainClass.java:17)

[nikialeksey]

The same issue for me on version 6.0

[nikialeksey]

I've fixed it using this:

    implementation('org.languagetool:language-all:6.0')
    implementation('com.google.guava:guava') {
        version {
            strictly '30.1-jre'
        }
    }

[mateuy-dev]

I've studied the issue.
Rule.java line 254 uses com.google.common.base.Suppliers.memoize function. This returns a com.google.common.base.Supplier. In older versions of guava this Google supplier implemented Java Supplier

public interface Supplier<T> extends java.util.function.Supplier<T>

However, in new versions it does not implement the java Supplier interface and LanguageTool fails to work.

I suppose that using the google supplier instead of the java Supplier inside this project should fix the problem.