Please help trying to install Java 7

After downloading Java7 and installing it I noticed that the java version is the same before installing java7. What step am I missing. I downloaded Java7 from http://wiki.bukkit.org/CraftBukkit_CentOS_Server_Setup

I am running CentOS 6

Code:

[root@localhost java]# java -version
java version "1.6.0_22"
OpenJDK Runtime Environment (IcedTea6 1.10.4) (rhel-1.42.1.10.4.el6_2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)
[root@localhost java]# rpm -i jre-7u1-linux-x64.rpm
Unpacking JAR files...
        rt.jar...
        jsse.jar...
        charsets.jar...
        localedata.jar...
[root@localhost java]# java -version
java version "1.6.0_22"
OpenJDK Runtime Environment (IcedTea6 1.10.4) (rhel-1.42.1.10.4.el6_2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)
[root@localhost java]#

 

Uninstall the OpenJDK first please...

Code:

rpm -e java-1.6.0_22-openjdk

After uninstalling the OpenJDK and installing the Sun Java JRE, you have to change some linkings.
http://wiki.centos.org/HowTos/JavaRuntimeEnvironment

 

I tried to remove openjdk first but failed. Is it really better to use the java7 JRE over what is already installed in CentOS?

Code:

[root@localhost User]# rpm -e java-1.6.0_22-openjdk
error: package java-1.6.0_22-openjdk is not installed
[root@localhost User]# java -version
java version "1.6.0_22"
OpenJDK Runtime Environment (IcedTea6 1.10.4) (rhel-1.42.1.10.4.el6_2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)

 

Here you go.
http://www.centos.org/modules/newbb/viewtopic.php?viewmode=flat&topic_id=5717&forum=28

 

I'm not sure where I went wrong, but now I cant check the java version.

Code:

[User@localhost ~]$ java -version
-bash: java: command not found
[User@localhost ~]$

Code:

[User@localhost ~]$ alternatives --config java
 
There is 1 program that provides 'java'.
 
  Selection    Command
-----------------------------------------------
*+ 1          /usr/java/jre1.7.0_01
 
Enter to keep the current selection[+], or type selection number:

 

Try this to check the Version.

Code:

java -Xmx4m -version
which java

 

here is what I got

Code:

[root@localhost java]# java -version
bash: java: command not found
[root@localhost java]# java -Xmx4m -version
bash: java: command not found
[root@localhost java]# which java
/usr/bin/which: no java in (/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/User/bin)
[root@localhost java]#

 

No Java installed

 

but why this?

Code:

[root@localhost User]# cd /usr/java
[root@localhost java]# dir
default  jre1.7.0_01  jre-7u1-linux-x64.rpm  latest
[root@localhost java]# rpm -i jre-7u1-linux-x64.rpm
        package jre-1.7.0_01-fcs.x86_64 is already installed
[root@localhost java]# java -version
bash: java: command not found

 

I Know, I'm bringing this back from the graveyard, but I had the same problem! And I couldn't find any solution. I Finaly Figured it out though.

What your having there is JRE And your going to need JDK