Current Version: 1.7.0_09-b05 x64
Download the lastest version from Oracle. You want Java 7 SE edition:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
You want the JDK version as this will include the JRE as well. Oracle require you to accept an agreement to download so you won't be able to wget the link from your server. So download it to your local machine and SCP it. Get the Linux x64 tar.gz version.
scp jdk-7u10-linux-x64.tar.gz chris@mydomain.com:
Once you've sent it, log on via SSH:
ssh chris@mydomain.com
if you have upgrade to the latest Debian then the /usr/lib64 folder might not be there anymore. It might have been merged with /usr/lib.
if /usr/lib64 exists then un tar the file to here:
tar zxvf jdk-7u10-linux-x64.tar.gz -C /usr/lib64/jvm/
If /usr/lib64 doesn't exist then un tar to here:
tar zxvf jdk-7u10-linux-x64.tar.gz -C /usr/lib/jvm/
You will want to update your $JAVA_HOME and $JRE_HOME variables:
export JAVA_HOME##/usr/lib/jvm/jdk1.7.0_10
export JRE_HOME##/usr/lib/jvm/jdk1.7.0_10
add these to your /etc/profile file so all users have this.
If you have multiple versions of java on your system (you might have version 1.6), then you need to utilize update-alternatives to set your local java and javavc commands:
update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_10/bin/java 1065
update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_10/bin/javac 1065
1065 is a priority number and higher means more important so we want this number to be higher than our java6 install. We can check this by:
update-alternatives --config java
Finally let's make sure that the java and javac commands point to the new version:
java -version
javac -version