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What difference does it make if JRE is not there in my system ?

Vikrant
Greenhorn

Joined: Jun 20, 2000
Posts: 4
Does it make any difference if I have the JDK installed on my machine but not JRE ?
If yes, kindly let me know.
Thanx.
Shriram Shivakumar
Ranch Hand

Joined: Jun 20, 2000
Posts: 42
JDK, Java Development Kit, helps you in compiling, running, debugging,profiling you Java applications/applets. Basically, it has got all the tool required for developing a Java application/applet. JRE, Java Runtime Environment, provides you with the tools required to mainly execute your java applications. ie., your .class file.
When you deploy your Java code, all you need is a JRE(for the deployment platform) to execute it.


-Shriram Shivakumar
Jim Yingst
Wanderer
Sheriff

Joined: Jan 30, 2000
Posts: 18671
Everything in the JRE is also part of the JDK, so you're not missing anything. The other way around though, there would be a big difference.


"I'm not back." - Bill Harding, Twister
Frank Carver
Sheriff

Joined: Jan 07, 1999
Posts: 6920
There is one small "gotcha", to beware of. Some JREs provide a n executable called "jre" to be called instead of the more standard "java" to run your applications. Scripts or programs written to use this probably won't work if you only have a JDK or SDK installed. It's simple to change "jre" to "java" if you have access to the source of the invoking program, but it is irritating.


Read about me at frankcarver.me ~ Raspberry Alpha Omega ~ Frank's Punchbarrel Blog
 
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