James questions

James answers

• How to persist the Lucene document index so that the documents do not need to be loaded into it each time the program starts up?
• Type inference in Java 7, When and why should it be used?
• Given an unknown length list, return a random item in it by scanning it only 1 time
• Awaiting multiple instances of CountDownLatch in container
• How do you create a user-defined number of threads?
• Are all immutable objects re-usable?
• abstract classes and interfaces best practices in java
• Java Try/Catch Issues
• Which scripting language interpreters does JDK contain?
• Resample Filter of WEKA - How to interpret the result