1、首先上Oracle官网下载JDK
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
2、新建一个安装文件夹及拷贝源文件到文件夹下并解压
cd /usr/local sudo mkdir java sudo cp -r ~/download/jdk-7u51-linux-x64.tar.gz /usr/lib/java sudo tar -zxvf jdk-7u51-linux-x64.tar.gz
3、设置环境变量,用gedit打开/etc/profile文件
sudo gedit /etc/profile
在文件的最后面增加:
export JAVA_HOME=/usr/local/java/jdk1.7.0_51 export JRE_HOME=/usr/local/java/jdk1.7.0_51/jre export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH export CLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
4、将系统默认的jdk修改过来
sudo update-alternatives --install /usr/bin/java java /usr/local/java/jdk1.7.0_51/bin/java 300 sudo update-alternatives --install /usr/bin/javac javac /usr/local/java/jdk1.7.0_51/bin/javac 300
5、查看JDK的版本,看是否安装成功
java -version
时间: 2024-07-28 13:31:41