Learn the Java programming language with the simplest explanations of the basic to advanced concepts. Start your Java development journey today.
What is Sorting? Sorting means arranging data in a specific, meaningful order, usually ascending (small to large) or descending (large to small). It is one of the most important concepts in computer science because it helps in organizing, searching, and analyzing data efficiently. For example, when you open your phone’s contact list, names appear alphabetically, … Read more
What is a Lambda Expression? A Lambda Expression is a short and clean way to represent a block of code that can be passed around and executed later. It was introduced in Java 8 to make programming easier and more expressive, especially when working with functional interfaces Before lambda expressions, if you wanted to implement … Read more
What is Java Threads? In Java, a thread is the smallest part of a program that can run independently. It is called a lightweight subprocess because it runs inside a larger program but performs its own task at the same time. Threads make it possible for Java applications to handle multiple activities at once, for … Read more
In Java, Regular Expressions (RegEx) are a powerful tool to find and manage patterns in text. They help you search, check, or modify strings quickly and efficiently. Java provides built-in support for Regular Expressions through the java.util.regex package. What is a Regular Expression? A Regular Expression (RegEx) is a sequence of characters that represents a … Read more
What is an Exception? An exception is an event that happens during the execution of a program, which interrupts its normal flow. Rather than allowing the entire program to crash, Java gives developers a structured way to detect, report, and handle these problems gracefully. An exception in Java is actually an object that is created … Read more
What is a Wrapper Classes? In Java, Wrapper Classes are special classes that convert primitive data types (such as int, char, and Boolean) into objects. They are called wrapper classes because they literally “wrap” the primitive value inside an object, giving it extra abilities that a normal primitive variable doesn’t have. Java provides a separate … Read more
What is an Iterator? An Iterator is a special object used to access elements of a collection one by one, such as a List, Set, or any other collection. It helps you navigate through a collection without knowing how that collection is implemented internally. Imagine it is a TV remote; you don’t need to open … Read more
What is a HashSet? A HashSet is a part of the Java Collections Framework that implements the Set interface, which stores unique elements and does not maintain any order of insertion. A HashSet is perfect when you want no duplicates and to quickly find elements. Features of HashSet in Java HashSet offers several advantages: How … Read more
What is HashMap? A HashMap is a powerful data structure that stores data in key-value pairs. It is a part of the Java Collections Framework and is found inside the java.util package. It is a part of the Java Collections Framework and is found inside the java.util package. Think of a HashMap as a kind … Read more
What is List Sorting? Sorting a list means arranging its elements in a particular order, usually ascending (small to large) or descending (large to small). Sorting makes your data easier to read, search, and analyze, especially when dealing with large collections like names, numbers, or objects. Java provides built-in tools to make sorting very easy … Read more