After you install the new version of Java on Linux, please reset the Environment Variables by adding the following lines at the end of /etc/profile file:

CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
PATH=$PATH:$JAVA_HOME/bin
export JAVA_HOME CLASSPATH PATH

Please perform the command "source /etc/profile" after saving the /etc/profile file. You can test if the new setting takes effect by "java -version" command.