1.Write a program in java 8 to convert the upper case charcaters in String to low case and viceversa if yes explain How CI/CD works 1. String>(); //method(b); // a.addAll(b); Syso(list.size());   List method(List arraylist){ arraylist.add("C" Can we override final method? Can member variable changed of final class? what is diffrence between C and Java language? What is @Transactinal annotaion?

The Java Collections Framework (JCF) is a vital part of the Java programming language, offering a collection the JCF, as they define the core functionalities of collections. 1. Step 1: Create `Book` Class ```java public class Book { private String title; private String Use Concurrent Collections in Multithreaded Environments If a collection is accessed by multiple threads , make sure to use concurrent collection classes, such as `ConcurrentHashMap`, instead of standard ones