Install and configure JDK in Linux

Openjdk is usually installed in Linux. However, in development, sunjdk is required in some cases. In this case, you can only uninstall openjdk and install sunjdk.
1. query existing installation versions
Rpm-Qa | grep JDK
2. Uninstall openjdk
Sudo Yum-y remove java-1.6.0-openjdk
3. Modify permissions
# Chmod 755 jdk-6u45-linux-i586-rpm.bin
4. Execute
/Jdk-6u45-linux-i586-rpm.bin
Or
Sh jdk-6u45-linux-i586-rpm.bin
5. Installation
Rpm-IVH jdk-6u45-linux-i586.rpm
6. modify the configuration file
# Vi. bashrc

#. Bashrc

# Source Global definitions
If [-F/etc/bashrc]; then
./Etc/bashrc
Fi

# User specific aliases and functions

######################################## #######################
# Edit by Hu Haibin (haib.hu@sunyard.com ##
######################################## #######################
Export java_home =/usr/Java/jdk1.6.0 _ 45
Export Path = $ path: $ java_home/bin
Export classpath =.: $ java_home/lib/dt. jar: $ java_home/lib/tools. Jar
######################################## #######################

Or modify/etc/profile.

######################################## #######################
# Edit by Hu Haibin (haib.hu@sunyard.com ##
######################################## #######################
Export java_home =/usr/local/Java/jdk1.6.0 _ 45
Export java_bin = $ java_home/bin
Export Path = $ path: $ java_home/bin
Export classpath =.: $ java_home/lib/dt. jar: $ java_home/lib/tools. Jar
Export java_home java_bin path classpath
######################################## #######################
7. Effective
Source. bashrc