ubuntu jdk java

第一步，下载jdk-7u4-linux-i586.tar.gz

到 Oracle 官网下载 JDK 7 。下载地址： http://download.oracle.com/otn-pub/java/jdk /7/jdk-7-linux-i586.tar.gz

第二步，解压安装

我把jdk安装到/opt/java 。

sudo mkdir /opt/java

解压

sudo mkdir /opt/javasudo tar zxvf /home/david/ 下载 /jdk-7u4-linux-i586.tar.gz -C/opt/java  

 

第三步，修改环境变量

用编辑器打开 /etc/environment

gedit /etc/environment

 

将其修改为：

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:${JAVA_HOME}/bin"
JAVA_HOME=/opt/java/jdk1.7.0_04
JRE_HOME=${JAVA_HOME}/jre
CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib 

然后重新加载.bashrc

source ~/.bashrc

第四步，修改默认配置项

到这里后运行 javac, java, 等命令还是不能用，接下来再执行下面命令：

sudo update-alternatives --install /usr/bin/java java /opt/java/jdk1.7.0_04/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /opt/java/jdk1.7.0_04/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /opt/java/jdk1.7.0_04/bin/jar 300
sudo update-alternatives --install /usr/bin/javah javah /opt/java/jdk1.7.0_04/bin/javah 300
sudo update-alternatives --install /usr/bin/javap javap /opt/java/jdk1.7.0_04/bin/javap 300 

第五步，测试一下

david@david-Rev-1-0:/$ java -version
java version "1.7.0_04"
Java(TM) SE Runtime Environment (build 1.7.0_04-b20)
Java HotSpot(TM) Server VM (build 23.0-b21, mixed mode)
david@david-Rev-1-0:/$ 

评论

1 楼 leagion 2013-06-28  

sudo rm /var/lib/dpkg/info/oracle-java7-installer*
sudo apt-get purge oracle-java7-installer*
sudo rm /etc/apt/sources.list.d/*java*
sudo apt-get update
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer