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Exception Handling in Java: try, catch, finally, throw and Best Practices
Mental model: An exception represents an abnormal condition that interrupts normal control flow. Good exception handling is not...
Continue ReadingChecked vs Unchecked Exceptions in Java: Differences, Examples and Design
Key distinction: Checked exceptions are enforced by the compiler through catch or throws declarations. Unchecked exceptions extend RuntimeException...
Continue ReadingCustom Exceptions in Java: Creating, Throwing and Handling Your Own Exceptions
Purpose: Custom exceptions give an application vocabulary for failures that matter to its domain. Instead of exposing generic...
Continue ReadingTry-With-Resources in Java: Automatic Resource Management with Examples
Core benefit: Try-with-resources makes cleanup part of the language syntax. Any resource implementing AutoCloseable can be declared in...
Continue ReadingRegular Expressions in Java: Pattern, Matcher, Groups and Practical Validation
Core model: A regex describes a pattern; Pattern represents the compiled pattern and Matcher applies it to input....
Continue ReadingIterators in Java: Iterator, ListIterator, Removal and Safe Traversal
Core purpose: Iterator provides a standard way to traverse a collection without exposing its internal representation. It also...
Continue ReadingEnums in Java: Constants, Methods, Fields, Constructors and Best Practices
More than constants: An enum is a type with a fixed set of instances. Each constant can have...
Continue ReadingJava Records: Compact Data Carriers, Constructors, Methods and Use Cases
Core idea: A record is a concise declaration for a class whose main purpose is to model data....
Continue ReadingAnnotations in Java: Metadata, Built-In Annotations and Custom Annotations
Metadata: Annotations attach metadata to program elements such as classes, methods, fields, and parameters. Compilers, tools, IDEs, and...
Continue ReadingLambda Expressions in Java: Functional Programming, Syntax and Examples
Core idea: A lambda is an expression that supplies an implementation for a functional interface. It makes small...
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