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#/usr/sbin/alternatives --config java

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* 1 /usr/java/jre1.6.0_03/bin/java
+ 2 /opt/jre1.6.0_03/bin/java

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java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)

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$ sudo ln -s ./jre1.6.0_03/plugin/i386/ns7/libjavaplugin_oji.so /usr/lib/mozilla/plugins/libjavaplugin_oji.so
$ sudo ln -s /opt/jre1.6.0_03/plugin/i386/ns7/libjavaplugin_oji.so /usr/lib/firefox-2.0.0.8/plugins/libjavaplugin_oji.so
$ su -
(Give your root password)
# nano /etc/profile.d/java.sh
export JAVA_HOME=/usr/java/jre1.6.0_03
export PATH=$JAVA_HOME/bin:$PATH
# source /etc/profile.d/java.sh
# /usr/sbin/alternatives --config java
There are 2 programs which provide 'java'.

Selection Command
-----------------------------------------------
*+ 1 /usr/lib/jvm/jre-1.7.0-icedtea/bin/java
2 /usr/lib/jvm/jre-1.5.0-gcj/bin/java
Enter to keep the current selection[+], or type selection number:
# /usr/sbin/alternatives --install /usr/bin/java java /usr/java/jre1.6.0_03/bin/java 3
# /usr/sbin/alternatives --config java
There are 3 programs which provide 'java'.
Selection Command
-----------------------------------------------
*+ 1 /usr/lib/jvm/jre-1.7.0-icedtea/bin/java
2 /usr/lib/jvm/jre-1.5.0-gcj/bin/java
3 /opt/jre1.6.0_03/bin/java
Enter to keep the current selection[+], or type selection number:
$ java -version
del
$ sudo alternatives --remove java /opt/jre1.6.0_02/bin/java
sed -i 's/XINERAMA/FAKEEXTN/g' /usr/lib/jvm/java-6-sun-1.6.0.00/jre/lib/i386/xawt/libmawt.so

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