java core

When using generics in Java, it’s important to follow standardized naming conventions and best practices. This improves code readability, maintainability, and aligns with Java community standards. Type Parameter Naming Conventions Java uses single uppercase letters for type parameters, each representing a specific kind of role. These are conventional, not enforced by the compiler, but widely …

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Java generics provide compile-time type safety by allowing you to define classes, interfaces, and methods with type parameters. These parameters can later be replaced with specific types when the generic is used. Type Bounds Type bounds restrict the kinds of types that can be passed to a generic type parameter. Without bounds, a type parameter …

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In Java, type safety and unchecked exceptions are two crucial concepts in writing reliable and maintainable code, especially in large-scale applications. Though they serve different purposes, both are central to ensuring correctness at compile-time and runtime. Type Safety Type safety ensures that a program will not perform operations on an object that are inappropriate to …

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Type inference lets the Java compiler figure out generic types for you, so you don’t have to write them out every time. It makes code shorter and cleaner. Example Without Type Inference With type inference (Java 7+): The <> is called the diamond operator, and the compiler understands the type from the left-hand side. Type …

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Java implements generics through a process called type erasure. This means that generic type information is removed (erased) by the compiler before the bytecode is generated. As a result, generic types are not available at runtime—they exist only at compile time for type checking and safety. What Is Type Erasure? Type erasure is Java’s technique …

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Raw types in Java generics, such as using List instead of List<String>, are a legacy feature designed for backward compatibility with pre-Java 5 code. They allow generic classes or interfaces to be used without specifying type parameters, but this comes at the cost of type safety, code clarity, and maintainability. Due to type erasure, generics …

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Runtime Type Information (RTTI) is a mechanism that allows Java programs to discover and use type information at runtime, rather than at compile time. This capability is essential for features such as: Dynamic type checking Reflection Polymorphism Generic type handling (with limitations due to type erasure) Why RTTI ? At compile time, Java enforces type …

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In Java, bridge methods are a lesser-known but critical mechanism generated by the compiler to ensure type safety and method overriding compatibility when generics and inheritance interact. They are especially relevant when type erasure comes into play, which removes generic type information at runtime. 1. What Are Bridge Methods? A bridge method is a synthetic …

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A generic interface in Java allows you to define an interface with type parameters, which can then be specified when the interface is implemented. Promotes code reusability Ensures type safety Supports flexible interface contracts Syntax Program-1 :Generic Interface with Non  Generic class Implementation Program 2: Generic Interface with Generic Class Program-3: Bounded Type in Generic …

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Overriding in Java refers to redefining a superclass method in a subclass. When using generics, overriding still follows the same rules, but type parameters can add flexibility or complexity. Generic classes can: Inherit from other generic or non-generic classes Override methods with or without type parameters Add constraints via bounded types Syntax Program Overriding With …

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