http://download.oracle.com/otn/java/jdk/7u67-b01/jdk-7u67-linux-x64.tar.gz
sudo mkdir /usr/lib/jvm
sudo cp -r jdk1.7.0_67 /usr/lib/jvm
vi ~/.profile
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_67 # Add JAVA to PATH for scripting
source ~/.profile
env
#如果JAVA_HOME=/usr/lib/jvm/jdk1.7.0_67,说明配置成功
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_67/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_67/bin/javac 300
sudo update-alternatives --config java
sudo update-alternatives --config javac
java -version
#如果看到java version "1.7.0_67",就说明安装成功
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