Introduction to Java Flashcards
What is Java?
It is a programming language created in 1995 that is owned by Oracle.
When and where did the development of Java begin?
It began in the early 1990s at Sun Microsystems, led by James Gosling.
What was the original name of the Java project?
It was called “Oak”.
When was the name “Java” officially chosen, and what inspired it?
1994, inspired by a coffee blend flavor.
When was the Java programming language formally announced?
at SunWorld ‘95.
When was Java 1.0 released, and what was its slogan?
1995, “Write Once, Run Anywhere” (WORA)
What new features were introduced with Java 1.1 in 1996?
Inner classes and the Abstract Window Toolkit (AWT)
What major changes were introduced in Java 2 Platform (Java 1.2) in 1997?
- Swing GUI toolkit
- Collections Framework
- Java Naming and Directory Interface
What were the key updates in Java 1.3, released in 2000?
- Performance Improvement
- HotSpot JVM
What features were introduced with Java 1.4 (J2SE 1.4) in 2002?
- ‘assert’
- Regular Expressions
- Java Web Start
What major features were introduced in Java 5, codenamed “Tiger,” in 2004?
- Generics
- Metadata Annotations
- Enumerated Types
- Enhanced For Loop
What were the significant updates in Java 6, also known as “Mustang,” released in 2006?
- Scripting Support via JC API
What were the key features introduced in Java 7, codenamed “Dolphin,” in 2011?
- Try-with-resources Statement
- Diamond Operator
- Fork/Join Framework
What groundbreaking features were introduced in Java 8, codenamed “Lambdas,” in 2014?
- Lambda Expressions
- Stream API
- java.time package
What were the significant updates in Java 9, released in 2017?
- Module System (Project Jigsaw)
- HTTP/2 Client
What were the key updates in Java 10 and Java 11, released in 2018?
- 10 - Local-variable Type Interference (‘var’)
- 11 - Long-term Support (LTS)
What notable features were introduced in Java 12 and Java 13, released in 2019?
Java 12 and 13 introduced incremental features.
What was introduced in Java 14, known as “Project Loom,” in 2020?
- Fibers (lightweight, user-mode threads)
What key features were added in Java 15, Java 16, and Java 17, released in 2021?
- Records
- Pattern Matching
How can you check if Java is installed on a Windows PC?
Type ‘java -version’ in CMD.
Where must every line of code that runs in Java be located?
Every line of code that runs in Java must be inside a class.
What naming convention should you follow for a class in Java?
A class name in Java should always start with an uppercase letter.
Is Java case-sensitive?
Yes.
“MyClass” and “myclass” have different meanings.
What must be true about the filename of a Java file?
It must match the class name and should be saved with the “.java” extension.
