linux 安装JDK

linux下安装 jdk

1、离线安装 

　1、到 Sun 的官网下载

http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

　　选择 accept license ，然后选择适合自己机型的JDK下载。

　　2、解压文件，修改文件名

$ sudo mkdir /usr/lib/jvm
$ sudo tar zxvf /home/linlin/soft/jdk-7u71-linux-i586.tar.gz -C /usr/lib/jvm
$ cd /usr/lib/jvm
$ sudo mv jdk1.7.0_71 jdk

　　3、添加环境变量

$ sudo  vim /etc/profile

　　加入如下内容

export JAVA_HOME=/usr/lib/jvm/jdk
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JER_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JER_HOME/bin:$PATH

$ source /etc/profile

　　4、测试

$ java -version
java version "1.7.0_71"
Java(TM) SE Runtime Environment (build 1.7.0_71-b14)
Java HotSpot(TM) Server VM (build 24.71-b01, mixed mode)

  

2、在线安装

使用下面命令先搜索自己需要的jdk的版本

lin@lin166:~$ apt-cache search jdk
default-jdk - Standard Java or Java compatible Development Kit
default-jdk-doc - Standard Java or Java compatible Development Kit (documentation)
default-jre - Standard Java or Java compatible Runtime
default-jre-headless - Standard Java or Java compatible Runtime (headless)
gcj-4.6-jdk - gcj and classpath development tools for Java(TM)
gcj-jdk - gcj and classpath development tools for Java(TM)
gcj-native-helper - Standard helper tools for creating gcj native packages
icedtea-6-jre-cacao - Alternative JVM for OpenJDK, using Cacao
icedtea-6-jre-jamvm - Alternative JVM for OpenJDK, using JamVM
icedtea-6-plugin - web browser plugin based on OpenJDK and IcedTea to execute Java applets
libcommons-lang-java - Extension of the java.lang package
libcommons-lang-java-doc - Documentation for an extension of the java.lang package
libhessian-java - Java implementation of a binary protocol for web services
libhessian-java-doc - Documentation for libhessian-java
libreoffice - office productivity suite
mauve - free test suite for the Java Class libraries
openjdk-6-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-6-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-6-doc - OpenJDK Development Kit (JDK) documentation
.......

能显示很多，选择自己需要的版本进行安装，这里我选择的是openjdk-7-jdk

使用下面命令进行安装

 $ apt-get install openjdk-7-jdk

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