java 8 - some error with compiling lambda function - java-8

Question

public class GrammarValidityTest {
private String[] dataPaths = new String[] {"data/", "freebase/", "tables/", "regex/"};
#Test(groups = {"grammar"})
public void readGrammars() {
try {
List<String> successes = new ArrayList<>(), failures = new ArrayList<>();
for (String dataPath : dataPaths) {
// Files.walk(Paths.get(dataPath)).forEach(filePath -> {
try {
if (filePath.toString().toLowerCase().endsWith(".grammar")) {
Grammar test = new Grammar();
LogInfo.logs("Reading grammar file: %s", filePath.toString());
test.read(filePath.toString());
LogInfo.logs("Finished reading", filePath.toString());
successes.add(filePath.toString());
}
}
catch (Exception ex) {
failures.add(filePath.toString());
}
});
}
LogInfo.begin_track("Following grammar tests passed:");
for (String path : successes)
LogInfo.logs("%s", path);
LogInfo.end_track();
LogInfo.begin_track("Following grammar tests failed:");
for (String path : failures)
LogInfo.logs("%s", path);
LogInfo.end_track();
assertEquals(0, failures.size());
}
catch (Exception ex) {
LogInfo.logs(ex.toString());
}
}
}
The line beginning with // is the one that brings up the error -"illegal start of expression" starting at the '>' sign.
I do not program much in java. I just downloaded a code from somewhere that is quite popular and supposed to run but I got this error. Any help/fixes/explanation would be appreciated.

Answer 1

Run javac -version and verify that you are actually using the compiler from JDK8, it's possible that even if your java points to the 1.8 releaase, your javac has a different version.
If you are using Eclipse, remember to set the source type for your project to 1.8.
Edit:
Since you are using ant, verify that your JAVA_HOME environment variable points to your jdk1.8 directory.