You need to check if you really using java 6. This happens when your system is using a java version under 6, which it doesn´t has the method: java.lang.String.isEmpty()Z
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
You need to check if you really using java 6. This happens when your system is using a java version under 6, which it doesn´t has the method: java.lang.String.isEmpty()Z