Janino fails to compile with the following error: javac -g \ -d bjanino \ org/codehaus/janino/*.java \ org/codehaus/janino/tools/*.java \ org/codehaus/janino/util/*.java \ org/codehaus/janino/util/enumerator/*.java \ org/codehaus/janino/util/iterator/*.java \ org/codehaus/janino/util/resource/*.java org/codehaus/janino/tools/JGrep.java:240: reference to Scanner is ambiguous, bot h class org.codehaus.janino.Scanner in org.codehaus.janino and class java.util.S canner in java.util match private static MethodInvocationTarget parseMethodInvocationPattern(String mi p) throws Scanner.ScanException, IOException, Parser.ParseException { Attached is jgrep.patch which fixes the problem.