Copy jdk-6u21-linux-i586.bin file using winscp to home dir.
Extract
#sh jdk-6u21-linux-i586.bin
#mkdir /usr/local/jdk
#mv jdk1.6.0_21 /usr/local/jdk/jdk1.6.0_21
#ln -s /usr/local/jdk/jdk1.6.0_21/ /usr/local/jdk/java
#cp jdk.csh /etc/profile.d/jdk.csh
#cp jdk.sh /etc/profile.d/jdk.sh
#cd /etc/profile.d
#vi jdk.csh à sesuaikan folder environment à /usr/local/jdk/java
#vi jdk.sh à sesuaikan folder environment à /usr/local/jdk/java
#reboot