ubuntu下安裝oracle JDK

1.下載jdk壓縮包
jdk-7u80-linux-x64.tar.gz
2.解壓到/app/jdk
3.設定環境變數
tian@tian-lenovo:/etc$ sudo vi profile
新增如下引數
JAVA_HOME=/app/jdk7
JRE_HOME=$JAVA_HOME/jre
JAVA_BIN=$JAVA_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME PATH CLASSPATH
儲存退出
tian@tian-lenovo:/etc$ source profile
4.驗證
tian@tian-lenovo:/etc$ java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)