If you get the above error message in Eclipse IDE then you must be using Java version 8 and the Eclipse version you have (like indigo) does not support java JDK 8. In JDK 8 the CharSequence Class have new default methods as compared to previous JDKs causing this issue,
Solutions:- You need to get back to JDK version 7.
- Or, You need to download a new Eclipse flavor like Kepler or any other version that supports JRE 8.
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