Java Programming Essentials:
- Java uses the JDK (Java Development Kit) for execution, consisting of a Java Compiler and JRE (Java Runtime
... [Show More] Environment).
- Java bytecode is executed by the platform-specific JVM (Java Virtual Machine), making Java platform-dependent.
- Key Java buzzwords include platform independence, object-oriented concepts, simplicity, and security for internet applications.
- Java follows OOPS concepts like abstraction, encapsulation, inheritance, and polymorphism.
Java Keywords and Naming Conventions:
- Java keywords serve various purposes, including exception handling, data types, and control structures.
- Naming conventions guide the naming of classes, methods, variables, and objects.
- Data types include primitive (boolean, int) and non-primitive (strings, arrays) types.
- Variables have fixed sizes in Java and are architecturally neutral.
Input and Output in Java:
- Java offers three main I/O streams: System.in, System.out, and System.err.
- Input can be read using the Scanner class or the BufferedReader class.
- Output can be displayed using methods like System.out.println() and System.out.printf().
- To access methods in a class, create an object of that class.
- Example code for reading input using the Scanner class was provided.
Reading Input in Java:
- Input can be read from the keyboard using InputStreamReader and BufferedReader.
- Data can be converted from strings to specific data types using Integer.parseInt() and Float.parseFloat().
- Reading input from a file involves using FileReader and BufferedReader.
- Command line arguments can be used to pass input data to a Java program.
Overall, Java programming encompasses platform independence, OOPS principles, essential keywords, naming conventions, and various methods for input and output, making it a versatile and powerful language for software development. [Show Less]