ubuntu上安装jdk
童学芬 2014-04-18 14:07

安装JDK的方法非常简单,和php环境比起来,简单不是一个等级的

    1. Download the following file:
  1. http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-i586.tar.gz (32-bit)

    http://download.oracle.com/otn-pub/java/jdk/7u1-b08/jdk-7u1-linux-x64.tar.gz (64-bit) 
    2. Decompress the .tar.gz file. 
    3. Move the JDK files to /usr/lib/jvm/jdk1.7.0 or elsewhere you like. 
    4. $sudo gvim /etc/environment   
    You will see 
    PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" 
    Change the file as (change the installation path if needed) 
    PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/jvm/jdk1.7.0/bin"   
    CLASSPATH=.:/usr/lib/jvm/jdk1.7.0/lib   
    JAVA_HOME=/usr/lib/jvm/jdk1.7.0   
    PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/jvm/jdk1.7.0/bin" 
    CLASSPATH=.:/usr/lib/jvm/jdk1.7.0/lib 
    JAVA_HOME=/usr/lib/jvm/jdk1.7.0 
    And then reload .bashrc file: 
    source ~/.bashrc 

    5. Run the following commands:  
    $sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0/bin/java 300 
    $sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0/bin/javac 300 
    $sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/jdk1.7.0/bin/javap 300 
    $sudo update-alternatives --install /usr/bin/javadoc javadoc /usr/lib/jvm/jdk1.7.0/bin/javadoc 300 
    Installation has now done. Run $java -version for a test.