Control: tags -1 + patch This is easily fixed by modifying the javac arguments in debian/rules:
--- a/debian/rules +++ b/debian/rules @@ -13,7 +13,7 @@ build-arch: build-stamp build-indep: build-stamp -JAVA_ARGS=-source 1.5 -target 1.5 +JAVA_ARGS=-source 1.8 -target 1.8 -encoding ISO-8859-1 build-stamp: dh_testdir