Question - History Of Java?
Answer -
- JAVA Developer Team (Team member or group) also known as Green Team.
- Java Old name is OAK ( based on Oak Tree).
- Java Developed by James Gosling. (Team of James Gosling)
- By Sun Micro Systems but now acquired by Oracle.
Question - Versions of Java?
Answers -
- JDK Alpha and Beta (1995 - for Sun Micro System use)
- JDK 1.0 (in 1996 - Public use)
- JDK 1.1
- J2SE 1.2
- J2SE 1.3
- J2SE 1.4
- J2SE 5.0
- Java SE 6
- Java SE 7
- Java SE 8 (We are going to study this + new fetures of other newer versions)
- Java SE 9
- Java SE 10 (Currently we use)
Question - What is JAVA?
Answer - Java Program is a collection of one or more classes, with one of them containing the program's executing starting point [ main() is the execution start point ].
Question - What is JDK, JRE and JVM?
Answer -
JDK - stands for JAVA DEVELOPMENT KIT
- As a developer, you have to write the code, compile it and run it.
- For writing code - you need pre-defined class (called API)
- For Compiling the code - you need Compiler
- For Run the code you need JVM (It is also called Java Interpreter)
- JDK is defined as a bundle of software that you can use to develop Java based application.
- JRE - stands for JAVA RUNTIME ENVIRONMENT
- JRE provides the minimum requirements for execution of the Java program
- JRE is a part of JDK
- Inside JRE = JVM + Other run time libraries.
- JVM - stands for JAVA VIRTUAL MACHINE
- It helps to convert BYTE CODE into MACHINE CODE.
- It is OS Dependent.
- JVM also Know as JAVA INTERPRETER.
[Short Video --- About JDK, JRE and JVM ]
[Detailed Video - About JDK, JRE and JVM ]
Some more Links ---
Go here to read more -- (edureka links)
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