linux 安装java shell

#!/bin/bash
 
# dos2unix *.sh
# Program:
# This program to install and config jdk .
# History:
# 2015/01/28 - add JRE_HOME 
 
#---------------------------- custom variables ---------------------start
runuser=root
jdk=jdk-6u27-linux-x64.bin
 
#---------------------------- custom variables ---------------------end
 
#---------------------------- user check ---------------------start
if [ "`whoami`" != "$runuser" ]; then
    echo "Please re-run ${this_file} as $runuser."
    exit 1
fi
#---------------------------- user check ---------------------end
 
#---------------------------- function ---------------------start
choice ()
{
clear
echo "
Choose one of the following numbers:
[0]I quit
[1]install jdk
[2]config profile
[3]check java version and path
 
"
}
 
pause()
{
    read -n1 -p "Press any key to continue..."
}
 
#---------------------------- function ---------------------end
 
#---------------------------- choice ---------------------start
 
clear
echo "
Choose one of the following numbers:
[0]I quit
[1]install jdk
[2]config profile
[3]check java version and path
 
"
while
echo "Input your choice: "
read  choice
do
case $choice in
    "0")
        exit 0
        ;;
    "1")
        cp $jdk /usr/local
        chmod u+x /usr/local/$jdk
        cd /usr/local
        /usr/local/$jdk
        pause
        choice
        ;;
    "2")
cat >> /etc/profile << EOF
export JAVA_HOME=/usr/local/jdk1.6.0_27
export JRE_HOME=/usr/local/jdk1.6.0_27/jre
export PATH=\$JAVA_HOME/bin:\$PATH
EOF
        source /etc/profile
        pause
        choice
        ;;
    "3")
        java -version
        echo JAVA_HOME
        pause
        choice
        ;;
    *)
        choice
        ;;
esac
done
 
#---------------------------- choice ---------------------end