Variables are used to store data values. In Java, you declare variables with a specific data type, such as int, double, or String. Variables hold values that can be manipulated and used in your program.
Java supports various data types, including primitive types (e.g., int, double, boolean) and reference types (e.g., objects, arrays). Data types define the kind of data a variable can hold.
Operators perform operations on variables and values. Java supports arithmetic, relational, logical, and assignment operators, among others.
Control flow statements, such as if-else, switch, for, while, and do-while, dictate the flow of execution in a Java program. They help control the order in which statements are executed.
Methods are blocks of code that perform a specific task and can be called from other parts of the program. They promote code reusability and modularity.
Java is an object-oriented programming language, and classes and objects are fundamental concepts. A class is a blueprint for objects, and objects are instances of classes.
Arrays allow you to store multiple values of the same type in a single variable. They provide a way to work with collections of data.
Inheritance is a mechanism in which a new class inherits properties and behaviors from an existing class. It promotes code reuse and supports the creation of a hierarchy of classes.
Exception handling enables the handling of runtime errors and exceptional situations. Java provides try, catch, throw, and finally blocks for effective exception management.