Java VM

[whitetr6]

I'm trying to install a specialized piece of software that is not part of the Gentoo portage tree, called cross-platform client for StarTeam (Borland). It's written in Java, so when I tried to install, it said it could not find the Java Virtual Machine on my system. What package(s) do I need to emerge for a Java VM? I tried emerge --search for Java VM, but nothing seemed obvious and I know nothing about Java to know which of the packages includes the VM. Thanks

[Mongoose5]

You could use:

dev-java/blackdown-jdk-1.4.1
dev-java/sun-jdk-1.4.2.07

both of them are java Development Kits

[JackDog]

I'm trying to install a specialized piece of software that is not part of the Gentoo portage tree, called cross-platform client for StarTeam (Borland). It's written in Java, so when I tried to install, it said it could not find the Java Virtual Machine on my system. What package(s) do I need to emerge for a Java VM? I tried emerge --search for Java VM, but nothing seemed obvious and I know nothing about Java to know which of the packages includes the VM. Thanks

Yikes. Sorry to hear that... StarTeam is horrible We are trying to jump ship this summer.

<Anyways>

I would recommend using a 1.5 JDK. Its faster, and looks a lot better. GTK LnF also works well.

[hlevyn]

With whatever JDK you choose, just make sure that it appears on the path. To test this simply execute:

Code: Select all

java -version

On a side note, the Win32 client for StarTeam is fairly decent. The cross platform client, as you've noticed, could use some work. At least it's better than the web interface.

[Ansur]

I would recommend using a 1.5 JDK. Its faster, and looks a lot better. GTK LnF also works well.

Any idea why 1.5 isn't in portage?

[JackDog]

It is... Just marked as unstable. You will have to download it first, then move it to /usr/portage/distfiles Then add

Code: Select all

dev-java/sun-jdk ~x86

to /etc/protage/package.keywords

It should then emerge. The JVMs are slotted so you can have more than one. There is a tool called java-config that lets you set the system and user jvm.

I usually just extract the jdk myself and set the PATHS myself...

[Ansur]

Wow
Thanks though

[IT]

I have a quick question about jkd & jre...on my last emerge update...I noticed it gave me a message that I was trying to remove my default VM...so I did the:

Code: Select all

 java-config -L

Code: Select all

 java-config -S

to set it all...but I'm confused as to why I have a few versions of both:
-L yields:

Code: Select all

[blackdown-jre-1.4.2.01] "Blackdown JRE 1.4.2.01" (/etc/env.d/java/20blackdown-jre-1.4.2.01)
[blackdown-jre-1.4.1] "Blackdown JRE 1.4.1" (/etc/env.d/java/20blackdown-jre-1.4.1)
[blackdown-jdk-1.4.2.01] "Blackdown JDK 1.4.2.01" (/etc/env.d/java/20blackdown-jdk-1.4.2.01)
[blackdown-jdk-1.4.1] "Blackdown JDK 1.4.1" (/etc/env.d/java/20blackdown-jdk-1.4.1) *

isn't 1.4.2.10 a newer version than 1.4.1? also, why doesn't the VM dynamically assign itself?...why did I have to go in there and assign it?

finally, what exactly are the differences between JDK and JRE? and which should I be using by default?

I have no idea about java...so bear with me on this one plz.

[Ansur]

1.4.2_01 is a more recent version than 1.4.2, though the difference between these two will be minimal.

The difference between the JDK and the JRE is as following:
JRE: Java RunTime Environment - you need this to use Java applications. Otherwise they won't run
JDK: Java Development Kit - you need this to develop Java applications. So if you are only a user of Java Applications, you have no need for this, the JRE will be sufficient then.