String Comparison and Immutability
References
Additional Java SE Packages
String class methods
References
String Creation and Manipulation
In Java, String is a widely used class that represents a sequence of characters. The String class is immutable, meaning once a String object is created, its value cannot be modified. Java provides several ways to create and manipulate strings using constructors, operators, and built-in methods. 1. String Creation Using String Literals: When a string …
Autoboxing and unboxing
Java introduced Autoboxing and Unboxing in Java 5 to facilitate the automatic conversion between primitive data types and their corresponding wrapper classes. This feature simplifies data manipulation by eliminating the need for explicit conversion. What is Autoboxing? Definition: Autoboxing is the automatic conversion of a primitive data type into its corresponding wrapper class object. Example: …
Conversion between wrappers and primitives
Java provides a mechanism to convert between primitive data types and their corresponding wrapper classes. This conversion is categorized into two processes: Autoboxing: Converting a primitive type to its wrapper class object. Unboxing: Converting a wrapper class object to its primitive type. Conversion Methods Example Program: Demonstrating Conversion Between Wrappers and Primitives Conversion between wrappers …
Wrapper classes
Java provides wrapper classes in the java.lang package to convert primitive data types into objects. These classes are essential for treating primitive data types as objects, enabling them to be used in data structures like collections. Why Wrapper Classes? Object Manipulation: Primitive data types cannot be treated as objects. Wrapper classes bridge this gap. Data …
Primitive data types
Java’s primitive data types can be categorized into four major categories: Integer Types (byte, short, int, long) Floating-Point Types (float, double) Character Type (char) Boolean Type (boolean) Example Program Java provides eight primitive data types categorized into four main groups: Integer, Floating-Point, Character, and Boolean. These data types are the building blocks of data manipulation …
Reflection API
Java Reflection API is part of the java.lang.reflect and java.lang packages. It allows inspection and manipulation of classes, interfaces, constructors, methods, and fields at runtime—even if they are private. This capability is extremely useful for frameworks, development tools, and advanced operations such as serialization, dependency injection, and testing. What is the Reflection API? The Reflection …
The Class
The java.lang package in Java provides fundamental classes that are automatically imported into every Java program. The Class class, specifically java.lang.Class, is a core class in this package. It represents classes and interfaces in a running Java application, serving as the entry point for Java’s reflection API. Below is a detailed explanation of the Class …