This document summarizes common issues and best practices in Java programming across several topics: 1. It discusses passing parameters by reference vs value in Java and the final keyword. 2. It covers strictfp keyword and ensuring IEEE 754 arithmetic. 3. It addresses differences between equals() and == operators and importance of overriding hashCode(). 4. It provides guidance on thread safety of DateFormat, logging, and volatile keyword usage in multithreading. 5. It recommends using JCA for connecting to EIS instead of modifying java.library.path and discusses transient keyword usage. 6. It compares efficiency of different Collection implementations and best practices.