Linux ->> Ubuntu 14.04 LTE下安装JDK 1.8

时间：2023-03-08 19:38:08
Linux ->> Ubuntu 14.04 LTE下安装JDK 1.8

先到Oracle官网的下载中心下载JDK8的tar包到本地。

下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

创建应用程序主目录

jerry@ubuntu:/usr/lib$ sudo mkdir jvm

解压下载的tar包到应用程序主目录下

jerry@ubuntu:~/Downloads$ sudo tar zxf jdk-8u65-linux-x64.tar.gz -C /usr/lib/jvm

重命名下文件夹

jerry@ubuntu:/usr/lib/jvm$ sudo mv jdk1..0_65 java

安装vim（因为UBuntu默认情况下不安装vim命令，需要用apt-get命令安装）

jerry@ubuntu:/usr/lib/jvm/java$ sudo apt-get install vim

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following extra packages will be installed:

  vim-runtime

Suggested packages:

  ctags vim-doc vim-scripts

The following NEW packages will be installed:

  vim vim-runtime

 upgraded,  newly installed,  to remove and  not upgraded.

Need to get , kB of archives.

After this operation, 28.0 MB of additional disk space will be used.

Do you want to continue? [Y/n] y

Get: http://us.archive.ubuntu.com/ubuntu/ trusty/main vim-runtime all 2:7.4.052-1ubuntu3 [4,888 kB]

Get: http://us.archive.ubuntu.com/ubuntu/ trusty/main vim amd64 2:7.4.052-1ubuntu3 [956 kB]

Fetched , kB in 18min 52s (, B/s)

配置环境变量，vim ~/.bashrc文件

jerry@ubuntu:/usr/lib/jvm/java$ sudo vim ~/.bashrc

添加下面的内容到文件尾部

export JAVA_HOME=/usr/lib/jvm/java

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

如果你的Ubuntu上已经安装了其他版本的JDK，你可以通过update-alternatives命令来设定比如命令Java的默认命令路径。然后就是编译下让update-alternatives配置生效。

jerry@ubuntu:/usr/lib/jvm/java$ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java/bin/java

update-alternatives: using /usr/lib/jvm/java/bin/java to provide /usr/bin/java (java) in auto mode

jerry@ubuntu:/usr/lib/jvm/java$ sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java/bin/javac

update-alternatives: using /usr/lib/jvm/java/bin/javac to provide /usr/bin/javac (javac) in auto mode

jerry@ubuntu:/usr/lib/jvm/java$ sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/java/bin/jar

update-alternatives: using /usr/lib/jvm/java/bin/jar to provide /usr/bin/jar (jar) in auto mode

jerry@ubuntu:/usr/lib/jvm/java$ sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/java/bin/javah

update-alternatives: using /usr/lib/jvm/java/bin/javah to provide /usr/bin/javah (javah) in auto mode

jerry@ubuntu:/usr/lib/jvm/java$ sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/java/bin/javap

update-alternatives: using /usr/lib/jvm/java/bin/javap to provide /usr/bin/javap (javap) in auto mode

jerry@ubuntu:/usr/lib/jvm/java$ sudo update-alternatives --config java

There is only one alternative in link group java (providing /usr/bin/java): /usr/lib/jvm/java/bin/java

Nothing to configure.

最后检查是否安装成功

jerry@ubuntu:/usr/lib/jvm/java$ java -version

java version "1.8.0_65"

Java(TM) SE Runtime Environment (build 1.8.0_65-b17)

Java HotSpot(TM) -Bit Server VM (build 25.65-b01, mixed mode)

jerry@ubuntu:/usr/lib/jvm/java$

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