Unit Testing with JUnit: ArraysCovers unit testing with JUnit for array methods, including testing minimum elements, handling exceptions, calculating averages, and sorting arrays.
Collections: Common WordsCovers the implementation of common words in Java using collections like ArrayList, HashSet, and TreeSet.
Input/Output Streams in JavaCovers the concept of input/output streams in Java, focusing on the hierarchy of streams and practical examples using IntelliJ IDEA.