Javac class file has wrong version 61.0 should be 55.0 July 8, 2019 16 32 64 128 General error during conversion unsupported class file major version 63 Javac class file has wrong version should be Java class file has wrong version 61.0 should be 55.0 Class file has wrong version 63.0 should be 61.0 Error class main is public should be declared in a file named main.java
