Installing Java Problems Post: 302503804

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Top Forums UNIX for Dummies Questions & Answers Installing Java Problems Post 302503804 by yifangt on Friday 11th of March 2011 05:47:52 PM

03-11-2011

Registered User

similar question but for upgrade

I was trying to upgrade my java 1.6.0_20 to java 1.6.0_24 as a self-learning experience. Felt nervous and want to know the right way. Yes, I downloaded the file from SUN:

Code:

jre-6u24-linux-x64.bin

and executed it. It was successfully installed in my local folder

Code:

/Downloads/jre1.6.0_24/

But, when I check the version it still displayed the old version which is linked the java executable by two symlinks after I recursively checked each file (for simplicity I put them directly here):

Code:

$ java -version
java version "1.6.0_20"
$which java
/usr/bin/java---> /etc/alternatives/java--->/usr/lib/jvm/java-6-openjdk/jre/bin/java

Now, my question is: can I replace the old java executable with the new one, or simply replace the whole folder that contains the java executable? I am aware there some new files. Not sure the whole story while I am trying to understand the basics.
I am using Ubuntu 10.10 Maverick Meerkat - released in October 2010 amd64-server in linux kernel 2.6.35.27-server & gnome 2.32.0.
Please someone give me a explanation. Thanks a lot!

Yifang

yifangt

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LEARN ABOUT MOJAVE

serialver

serialver(1)						      General Commands Manual						      serialver(1)

NAME

       serialver - serial version command

SYNOPSIS

       serialver [ options ] [ classnames ]

       options
	      Command-line options, as specified in this document.

       classnames
	      One or more class names.

DESCRIPTION

       serialver returns the serialVersionUID for one or more classes in a form suitable for copying into an evolving class.  When invoked with no
       arguments, it prints a usage line.

OPTIONS

       -classpath  <directories and zip/jar files separated by:>
		      Set search path for application classes and resources.

       -show	      Displays a simple user interface.  Enter the full class name and press either the Enter key or the Show  button  to  display
		      the serialVersionUID.

       -Joption       Pass  option to the Java virtual machine, where option is one of the options described on the man page for the java applica-
		      tion launcher, java(1). For example, -J-Xms48m sets the startup memory to 48 megabytes. It is a common convention for -J	to
		      pass options to the underlying virtual machine.

SEE ALSO

       See (or search java.sun.com) for the following:

       java.io.ObjectStreamClass @
	    http://java.sun.com/j2se/1.5/docs/api/java/io/ObjectStreamClass.html

								   24 June 2004 						      serialver(1)

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LEARN ABOUT MOJAVE

serialver