Java Tutorial

In Java, arrays and strings are essential for handling data collections and text. Arrays allow you to store multiple values of the same type, while strings represent sequences of characters. The StringBuilder class provides a way to efficiently manipulate strings.

In Java, methods (sometimes called functions) are blocks of code that perform specific tasks and can be invoked to execute their code when needed. Methods are essential in programming because they help organize code, make it reusable, and facilitate modularization.

In Java, control flow statements determine the order in which code executes. The main control flow statements are conditional statements (if-else, switch) and loops (for, while, do-while), which allow you to create logic based on conditions and repeat code as needed.

Java was designed to be a versatile language for interactive TV, but it wasn’t initially feasible for that industry. However, with the rise of the internet, Java found its purpose and was rebranded in 1995.

In Java, data types define the kind of data a variable can hold, like int for whole numbers or double for decimals. Variables are named containers for data, declared with a type, e.g., int age = 25;. Type casting converts one data type to another, such as int to double (automatic) or double to int (requires a cast).