Java Lambda Expressions, introduced in Java 8, provide a clear and concise way to represent one method interface using an expression. They are particularly useful for functional interfaces, which are interfaces with a single abstract…
In Java, Hidden Classes are a feature introduced in Java 15 as part of the JEP 371 proposal. They are not meant for direct use by typical application developers but are more relevant to frameworks,…
Java sealed classes, introduced in Java 15 as a preview feature and finalized in Java 17, allow developers to define which classes or interfaces can extend or implement a given class or interface. This provides…
In Java, the throw keyword is used to explicitly throw an exception. It’s a powerful feature for handling error cases in your programs. You can throw either checked or unchecked exceptions, depending on your needs.…
In Java, the finally block is used in exception handling to ensure that a section of code is always executed, regardless of whether an exception is thrown or not. The finally block is typically used…
In Java, the concept of a “static class” typically refers to static nested classes. Java does not support creating a completely standalone static class, but a class defined within another class can be marked as…
Java inner classes are classes that are defined within another class. They provide a way to logically group classes that are only used in one place and help encapsulate the outer class functionality by hiding…
Nested try blocks in Java are a way to handle complex error scenarios by allowing try blocks within other try or catch blocks. This is especially useful when you need to perform multiple operations that…
Regular Expressions (Regex) in Java provide a powerful way to search, match, and manipulate strings. They are part of the java.util.regex package and allow you to use patterns to locate, extract, and replace specific text…
The FileReader class in Java is used to read character-based data from files. It is part of the java.io package and allows you to read data from a file character by character, line by line,…