[javac] Compiling 321 source files to C:\L2_Gameserver\build\classes [javac] C:\L2_Gameserver\java\net\sf\l2j\Base64.java:91: cannot access java.lang.Object [javac] bad class file: C:\Java\lib\rt.jar(java/lang/Object.class) [javac] class file has wrong version 49.0, should be 48.0 [javac] Please remove or make sure it appears in the correct subdirectory of the classpath. [javac] private final static String PREFERRED_ENCODING = "UTF-8"; [javac] ^ [javac] 1 errorBUILD FAILED: C:\L2_Gameserver\build.xml:107: Compile failed; see the compiler error output for details.Total time: 7 seconds