1、下载JDK ,我下载的是jdk-7u51-linux-i586.tar.gz
我这里有jvm文件夹,直接cd过去:
$ cd/usr/lib/jvm/
拷贝下载的jdk-7u51-linux-i586.tar.gz到jvm文件夹:
$ sudo cp ~/下载/jdk-7u51-linux-i586.tar.gz/usr/lib/jvm
解压:
$ sudo tar -zxvfjdk-7u51-linux-i586.tar.gz
设置环境变量:
$ sudo gedit/etc/profile
在文档结尾追加:
exportJAVA_HOME=/usr/lib/jvm/jdk1.7.0_51
exportPATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
exportCLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
将系统默认的java修改过来:
$ sudo update-alternatives--install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_51/bin/java300
$ sudo update-alternatives --install /usr/bin/javac javac/usr/lib/jvm/jdk1.7.0_51/bin/javac 300
$ sudo update-alternatives --config java
$ sudo update-alternatives --config javac
检测一下,输入:
$ java -version
显示:
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) Server VM (build 24.51-b03, mixedmode)
我这里有jvm文件夹,直接cd过去:
$ cd/usr/lib/jvm/
拷贝下载的jdk-7u51-linux-i586.tar.gz到jvm文件夹:
$ sudo cp
解压:
$ sudo tar -zxvfjdk-7u51-linux-i586.tar.gz
设置环境变量:
$ sudo gedit/etc/profile
在文档结尾追加:
exportJAVA_HOME=/usr/lib/jvm/jdk1.7.0_51
exportPATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
exportCLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
将系统默认的java修改过来:
$ sudo update-alternatives--install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_51/bin/java300
$ sudo update-alternatives --install /usr/bin/javac javac/usr/lib/jvm/jdk1.7.0_51/bin/javac 300
$ sudo update-alternatives --config java
$ sudo update-alternatives --config javac
检测一下,输入:
$ java -version
显示:
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) Server VM (build 24.51-b03, mixedmode)