ubuntu安装jdk8&eclipse
Java的安装
1.下载jdk
- 手动下载
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
- 命令下载：wget -c http://download.oracle.com/otn-pub/java/jdk/xxx.tar.gz
2.解压 xxx.tar.gz
命令：tar zxvf ./jdk-7u79-linux-x64.tar.gz
注：在root下面找到当前用户的目录，例如到下载目录下
3.新建jvm文件夹
sudo su
cd /usr/lib/
mkdir jvm
4.移动并解压文件到/usr/lib/jvm
命令 tar zxvf jdk-7u79-linux-x64.tar.gz -C /usr/lib/jvm
5.修改环境变量
vim ~/.bashrc
在vim文件中写入
export JAVA_HOME=/usr/lib/jvm/java-7-sun
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
输入:wq保存并退出编辑器
source ~/.bashrc
6.配置默认JDK版本
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/javaxxx/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/javaxxx/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/javaxxx/bin/jar 300
sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/javaxxx/bin/javah 300
sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/javaxxx/bin/javap 300
sudo update-alternatives --config java
7.确定环境的配置完成
输入 java java-version
eclipse的安装
1.下载eclipse
http://www.eclipse.org/downloads/
2.将eclipse放到opt文件夹下
cd 下载
sudo do
tar zxvf eclipse-jee-mars-R-linux-gtk-x86_64.tar.gz -C /opt