1. GET jdk and jre by apt
#apt-get install sun-java6-jdk sun-java6-jre
2.SET JRE
#update-alternatives –config java
you will see
———————————————–
1 /usr/bin/gij-4.2
2 /usr/lib/jvm/java-gcj/jre/bin/java
3 /usr/lib/jvm/ia32-java-6-sun/jre/bin/java
* 4 /usr/lib/jvm/java-6-sun/jre/bin/java
+ 5 /usr/lib/jvm/java-6-openjdk/jre/bin/java
6 /usr/lib/jvm/java-1.5.0-sun/jre/bin/java
choose which you want
3.SET JAVAC
#update-alternatives –config java
———————————————–
1 /usr/bin/gij-4.2
2 /usr/lib/jvm/java-gcj/jre/bin/java
3 /usr/lib/jvm/ia32-java-6-sun/jre/bin/java
* 4 /usr/lib/jvm/java-6-sun/jre/bin/java
+ 5 /usr/lib/jvm/java-6-openjdk/jre/bin/java
6 /usr/lib/jvm/java-1.5.0-sun/jre/bin/java
4. # javac -version
javac 1.6.0_06
5 # java -version
java version “1.6.0″
OpenJDK Runtime Environment (build 1.6.0-b09)
OpenJDK 64-Bit Server VM (build 1.6.0-b09, mixed mode)
Notice: do not set JAVA_HOME!