package object_out; import java.util.HashMap; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; public class TestMapInitialization { private static final Object CACHE_ATTR = null; private Object _sourceResolver; private ConcurrentHashMap appScope = new ConcurrentHashMap(); public void getAnnotationReader(Class type) { appScope.putIfAbsent(CACHE_ATTR, ""); } }