linux安装jdk

 
 
 http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.tar.gz
 
 
 
 .切换用户
  sudo -i  然后输入密码
 
 2.将jdk-8u144-linux-x64.tar.gz从桌面拷贝到/usr/local/jdk目录下
 
 cp /home/kangkang/Desktop/jdk-8u144-linux-x64.tar.gz /usr/local/jdk
 
 3.解压jdk-8u144-linux-x64.tar.gz文件
 
 tar -zxvf jdk-8u144-linux-x64.tar.gz
 
 4.编辑配置文件，配置环境变量
 
 vim /etc/profile

添加如下内容：JAVA_HOME根据实际目录来
#set java environment
JAVA_HOME=/usr/local/jdk/jdk1.8.0_151
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH

5.重启机器或执行命令 ：source /etc/profile
或者sudo shutdown -r now

6.查看安装情况
java -version
安装成功则出现java版本信息
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)