JDK 6 update 21 config problem

[mlhazan]

Hello experts,
I moved the jdk1..bin file to the /usr/bin/jvm and installed it as a root.I also configured jre with my firefox plugin.I tested that and java aaplets are running fine.but whenever I try to compile a .java file ,it shows the following:

root@optix:/home/mlhazan/Desktop# javac a.java 
The program 'javac' can be found in the following packages:
 * openjdk-6-jdk
 * ecj
 * gcj-4.4-jdk
 * gcj-4.3
Try: apt-get install <selected package>

when I Type java -version it shows:

root@optix:/home/mlhazan/Desktop# java -version
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-4ubuntu3)
OpenJDK Server VM (build 16.0-b13, mixed mode)

it means java is on my system and working but there may some config problem.When ever I try to install limeware it shows:

Error: Dependency is not satisfiable: sun-java6-jre|icedtea-java7-jre|sun-java6-jdk|icedtea-java7-jdk

Can any one please help me.

[Kloschüssel]

you have installed the icedtea jre, but are missing the jdk. to understand why you need the jdk, i can just say:

JRE = java runtime environment
JDK = java developers kit

JRE => run java programs
JDK => create (i.e. compile) java programs

the JDK needs the JRE, but not vice-versa. anyway, I would recommend to install the openjdk-6-jdk package and uninstall the other java framework packages. from what I read of it, it has a pretty good hotspot VM to run the code which (as I know) performs best amongst all the available virtual machines.