JRE vrs. JVM
Ulf Dittmer
Rancher
Posts: 42972
73
Diego Freniche
Greenhorn
Posts: 8
posted 9 years ago
Think of it that way:
- JVM: Java Virtual Machine. The program that interpretes Java bytecode stored in .class files. In Windows, java.exe.
- JRE: Java Runtime Environment. A JVM is not enough. You need an implementation of the core Java APIs. As you need in C the shared libraries installed in your system.
In short:
JRE = JVM + core Java APIs (in jar format) + utils
- JVM: Java Virtual Machine. The program that interpretes Java bytecode stored in .class files. In Windows, java.exe.
- JRE: Java Runtime Environment. A JVM is not enough. You need an implementation of the core Java APIs. As you need in C the shared libraries installed in your system.
In short:
JRE = JVM + core Java APIs (in jar format) + utils
SCBCD 1.3, SCWCD 1.5, SCJP 1.5 & 1.6
Raees Uzhunnan
Ranch Hand
Posts: 126
posted 9 years ago
The above postings are right !. Additionally if you are looking for java development, you need to download Java SDK (or called JDK ). This includes all the above and the tools to develop; compile ; debug and deploy
Raees
[ January 03, 2008: Message edited by: Raees Uzhunnan ]
Raees
[ January 03, 2008: Message edited by: Raees Uzhunnan ]
Sun Certified Enterprise Architect
Java Technology Blog
Bill Shirley
Ranch Hand
Posts: 457
posted 9 years ago
nice diagram:
http://java.sun.com/j2se/1.5.0/docs/
JRE - bracket on left
Java Virtual Machine - blue layer on bottom
http://java.sun.com/j2se/1.5.0/docs/
JRE - bracket on left
Java Virtual Machine - blue layer on bottom
Bill Shirley - bshirley - frazerbilt.com
if (Posts < 30) you.read( JavaRanchFAQ);
