diff -r 09fbefc0e6a9 -r 59656cd16411 src/server/plugins/java/Makefile
--- a/src/server/plugins/java/Makefile	Sun Aug 17 15:15:32 2014 +0200
+++ b/src/server/plugins/java/Makefile	Mon Apr 06 16:36:25 2015 +0200
@@ -60,7 +60,7 @@
 	$(CC) -o $(NSAPI_JNI_LIB) $(JNI_OBJS) $(LDFLAGS)
 
 $(JAVA_WSRT): $(JAVASRC)
-	ant compile jar
+	ant -Dbuild.compiler=javac1.7 compile jar
 
 
 ../../../../build/server/plugins/java/%.o: %.c