JPG questions

• not able to remove message from jms activemq queue
• how to kill the session on stopping of server
• javac command not working in linux environment
• is collections.sort method only used for List type of collections?
• google gson fromjson() TypeToken
• confusion in java 8 method referencing for equals method implementation with BiPredicate
• What is the difference between Thread.join and Synchronized?

JPG answers