2 )./jdk-6u30-linux-x64.bin
3 ) vim /etc/profile
4)增加環境變量
export JAVA_HOME=/usr/local/jdk/jdk1.6.0_30
export JAVA_BIN=//usr/local/jdk/jdk1.6.0_30/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