Introduction Java 11 introduced a new feature called local-variable syntax for lambda parameters. This feature allows you to use the var keyword in lambda expressions to declare the types of parameters, similar to how you can use var for local variable type inference in methods. This feature provides more flexibility in how you write lambda …
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Introduction In Java, the Optional class is used to represent a value that may or may not be present. It is part of the Java 8 feature set introduced to handle cases where a value might be null, thus helping to eliminate NullPointerExceptions in the code. The Optional.orElseThrow() method is one of the methods provided …
Introduction Java 10 introduced the Collectors.toUnmodifiableMap() method, which is used to collect elements from a stream into an unmodifiable map. This method is part of the Java Stream API and provides a way to create read-only maps directly from streams. Once created, the resulting map cannot be modified, ensuring data integrity and immutability. Key Points: …
Introduction Java 10 introduced the Collectors.toUnmodifiableSet() method, which is used to collect elements from a stream into an unmodifiable set. This method is part of the Java Stream API and allows you to create read-only sets directly from streams, ensuring that the resulting set cannot be modified. Key Points: Immutable Set: Collectors.toUnmodifiableSet() creates a set …
Introduction Java 10 introduced the Collectors.toUnmodifiableList() method as part of the Java Collections Framework. This method is used in conjunction with the Java Stream API to collect elements into an unmodifiable list. Once created, the resulting list cannot be modified, making it a convenient way to create immutable lists directly from streams. Key Points: Immutable …
Introduction Java 10 introduced the Map.copyOf() method, which creates an unmodifiable copy of an existing map. This method allows you to easily create read-only maps, ensuring that the map cannot be modified after its creation. The Map.copyOf() method is part of Java’s effort to enhance immutability and improve the safety and clarity of code. Key …
Introduction Java 10 introduced the Set.copyOf() method, which creates an unmodifiable copy of an existing set. This feature simplifies the process of creating read-only sets, ensuring that the set cannot be modified after its creation. The Set.copyOf() method is part of Java’s effort to enhance immutability and make code more concise and safe. Key Points: …
Introduction Java 10 introduced a new method called List.copyOf(). This method creates an unmodifiable copy of an existing list, meaning you can’t change the list after you create it. This is useful when you want to share a list with other parts of your program, but ensure that the list cannot be modified. Key Points: …
Introduction Java 10 introduced a new feature called local-variable type inference using the var keyword. This feature allows the Java compiler to infer the type of a local variable based on the context, eliminating the need for explicit type declarations in certain scenarios. It simplifies the code by reducing boilerplate and enhancing readability. Key Points: …
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Introduction The Java String Constant Pool, also known as the String Pool, is a special memory area in the Java heap where Java stores string literals. This mechanism helps to save memory and improve performance by reusing immutable string instances. Understanding the String Pool and its behavior is crucial for efficient memory management and performance …
Introduction The Map.ofEntries method, introduced in Java 9, provides a convenient way to create immutable maps. This method belongs to the java.util.Map interface and allows you to create a map with a fixed set of key-value pairs. The maps created using Map.ofEntries are immutable, meaning that their entries cannot be changed, added, or removed once …
Introduction The Set.of method, introduced in Java 9, provides a convenient way to create immutable sets. This method belongs to the java.util.Set interface and allows you to create a set with a fixed set of elements. The sets created using Set.of are immutable, meaning that their elements cannot be changed, added, or removed once the …
Introduction The List.of method, introduced in Java 9, provides a convenient way to create immutable lists. This method belongs to the java.util.List interface and allows you to create a list with a fixed set of elements. The lists created using List.of are immutable, meaning that their elements cannot be changed, added, or removed once the …
Introduction Private methods in interfaces were introduced in Java 9. These methods allow you to define helper methods within an interface that can be used by other default and static methods within the same interface. Private methods help to avoid code duplication and improve code maintainability by enabling the reuse of common logic across multiple …
Introduction JShell, introduced in Java 9, is a Read-Eval-Print Loop (REPL) tool that allows developers to interactively evaluate Java code snippets. JShell provides a quick and easy way to test and explore Java code without the need for a full development environment. It is particularly useful for prototyping, learning, and testing small pieces of code. …
Introduction Java modules were introduced in Java 9 as part of the Project Jigsaw. The module system, also known as the Java Platform Module System (JPMS), aims to provide a more scalable and flexible way to handle large applications and libraries. Modules help improve the structure, security, and maintainability of Java applications by enabling strong …
Introduction The Java Date and Time API, introduced in Java 8, provides a comprehensive model for date and time handling. The new API is based on the ISO-8601 calendar system and is intended to replace the old java.util.Date and java.util.Calendar classes. The API is designed to be easy to use and understand, providing a more …
Introduction The Optional class in Java is a container object used to represent the presence or absence of a value. It was introduced in Java 8 to reduce the number of null pointer exceptions and to provide a more expressive way of handling optional values. Key Points: Null Safety: Reduces the risk of null pointer …
Introduction Java 8 introduced significant enhancements to the language, one of which is the ability to define default and static methods in interfaces. These methods allow interfaces to provide concrete implementations, enabling new functionalities without breaking existing code that implements the interface. Key Points: Default Methods: Allow interfaces to have methods with default implementations. Static …
Introduction The Java Stream API, introduced in Java 8, provides a powerful way to process sequences of elements in a functional style. Streams allow you to perform operations such as filtering, mapping, and reducing on collections in a declarative manner. The Stream API is part of the java.util.stream package and is designed to work seamlessly …
Introduction Functional interfaces in Java are interfaces that have exactly one abstract method. They can have multiple default or static methods but only one abstract method. These interfaces are the foundation of lambda expressions and method references in Java. The concept of functional interfaces is central to Java’s implementation of functional programming principles. Key Points: …
Introduction In this tutorial, we’ll learn one of the most exciting features introduced in Java 8 — lambda expressions. Lambda expressions provide a clear and concise way to represent anonymous functions. They allow us to write less code while making our code easier to understand, especially when dealing with functional interfaces and collections. Let’s dive in and …
Introduction In Java, concurrency utilities are provided to handle synchronization and ensure thread safety. Locks and atomic variables are two key components of the java.util.concurrent package. Locks offer more extensive locking operations than synchronized methods and statements, while atomic variables provide a way to perform atomic operations on single variables without using synchronization. Key Points: …
Introduction Callable and Future are part of the java.util.concurrent package and are used for concurrent programming. Callable is similar to Runnable, but it can return a result and throw a checked exception. Future represents the result of an asynchronous computation and provides methods to check if the computation is complete, to wait for its completion, …
Introduction ExecutorService in Java is a part of the java.util.concurrent package and provides a higher-level replacement for working with threads directly. It simplifies the process of managing a pool of threads and executing tasks asynchronously. ExecutorService offers various methods for submitting tasks, shutting down the executor, and managing the lifecycle of threads. Key Points: Thread …