: Using generic classes and mastering collections like ArrayList , TreeSet , and ArrayDeque .
: Advanced use of inheritance, encapsulation, and polymorphism; implementing singleton and immutable classes; and overriding methods like hashCode , equals , and toString . OCP: Oracle Certified Professional Java SE 8 Pr...
: Access the Sybex online learning environment for electronic flashcards and additional practice tests. 3. Preparation Strategy : Using generic classes and mastering collections like
: Managing file systems using the java.io and java.nio.file packages. JDBC : Developing database applications using JDBC. 2. Recommended Study Resources implementing singleton and immutable classes
: Working with worker threads ( Runnable , Callable ), ExecutorService , and identifying threading problems like deadlocks or race conditions.