在Ubuntu手動安裝Sun Java JDK

1. sudo -s ./jdk-6u12-linux-i586.bin
2. sudo gedit /etc/profile
   #set java environment
   JAVA_HOME=/home/xxxxxx/JAVA/jdk1.6.0_25
   export JRE_HOME=/home/xxxxxx/JAVA/jdk1.6.0_25/jre
   export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
   export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
3. sudo update-alternatives --install /usr/bin/java java /home/xxxxxx/JAVA/jdk1.6.0_25/bin/java 300
4. sudo update-alternatives --install /usr/bin/javac javac /home/xxxxxx/JAVA/jdk1.6.0_25/bin/javac 300
5. sudo update-alternatives --config java
6. java -version