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Introduction to Java

Introduction to Java

Content

What is Java?
History of Java
Features of Java
Hello World Example
Activity

Updated on 10/09/2024
450 Views

What is Java?

Java is a popular, high-level programming language used for building a wide range of applications, from mobile apps to large-scale enterprise systems. It is known for its portability, meaning code written in Java can run on any device that has the Java Virtual Machine (JVM).

History of Java

Developed by Sun Microsystems in the mid-1990s. James Gosling is considered the father of Java. It is now owned by Oracle Corporation.

Features of Java

Object-Oriented: Everything in Java is an object.
Platform-Independent: Write once, run anywhere (WORA).
Simple and Secure: Java is designed to be easy to use and has strong security features.
Robust and Multithreaded: Java programs can handle many tasks simultaneously and manage errors effectively.

Hello World Example

Write and run your first Java program that prints 'Hello, Java!' to the console.

Activity

Write and run a simple Java program that prints 'Hello, Java!' to the console.

Quiz

1. What is the main purpose of the Java Virtual Machine (JVM)?

a) To compile Java code
b) To interpret Java code
c) To run Java programs on any platform
d) To debug Java programs

2. Who is considered the father of Java?

a) Bill Gates
b) Steve Jobs
c) James Gosling
d) Mark Zuckerberg

3. What does WORA stand for?

a) Write Once, Read Anywhere
b) Write Once, Run Anywhere
c) Write Once, Rewrite Always
d) Write Once, Run Anytime

4. Is Java platform-independent? Why or why not?

a) Yes, because it is open-source
b) No, because it only runs on Windows
c) Yes, because it runs on the JVM
d) No, because it needs a specific compiler