Ubuntu 14.04 安装jdk1.7.0_65

Ubuntu 14.04 安装jdk1.7.0_651、oracle官网下载jdk-7u65-linux-x64.tar.gz
#http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html#

Linux x64

135.79 MB

href="javascript:%20void(0)" jdk-7u65-linux-x64.tar.gz

2、在/usr/lib/下mkdir jvm/目录
#sudo cp jdk-7u65-linux-x64.tar.gz jvm/ 解压#sudo tar zxvf jdk-7u65-linux-x64.tar.gz 得到jdk1.7.0_65/#sudo rm jdk-7u65-linux-x64.tar.gz
3、设置环境变量，用gedit打开/etc/profile文件
（注gedit和 vim的使用区别 gedit试用desktop版本的系统 而vim编辑器试用任何版本） #sudo vi /etc/profile
在文件的最后面增加：
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_65
export JRE_HOME=${JAVA_HOME}/jreexport CLASSPATH=$CLASSPATH:.:${JAVA_HOME}/lib:${JAVA_HOME}/jre/libexport PATH=${JAVA_HOME}/bin:${JAVA_HOME}/jre/bin:$PATH:wq 保存退出注：如果系统默认安装了openjdk-7 将系统默认的jdk修改过来
#update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_65/bin/java 300#update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_65/bin/javac 300 #update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7.0_65/bin/jar 300
#update-alternatives --config java
#update-alternatives --config javac
#update-alternatives --config jar
没安装则提示
#update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_65/bin/java 300update-alternatives: using /usr/lib/jvm/jdk1.7.0_65/bin/java to provide /usr/bin/java (java) in 自动模式#update-alternatives --config javaThere is only one alternative in link group java (providing /usr/bin/java): /usr/lib/jvm/jdk1.7.0_65/bin/java无需配置。
4、验证
java –version配置成功java version "1.7.0_65"Java(TM) SE Runtime Environment (build 1.7.0_65-b17)Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)