fedora delete openJDK

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• linux

由于Fedora系统安装的时候会自带OpenJDK，安装完系统后 java -version 会显示

[root@localhost bin]# java -version

java version "1.6.0_22"

OpenJDK Runtime Environment (IcedTea6 1.10.1) (fedora-57.1.10.1.fc15-i386)

OpenJDK Client VM (build 20.0-b11, mixed mode)

如果要自己安装JDK 首先到sun 官网上下载JDK，找到系统对应的版本,我这里下载的是 jdk-6u33-linux-i586-rpm.bin 下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jdk6-downloads-1637591.html

下载完JDK 后，到下载目录给当前用户赋予执行权限

[root@localhost Downloads]# chmod +x jdk-6u33-linux-i586-rpm.bin

终端中输入“./jdk-6u33-linux-i586-rpm.bin”执行解压及安装操作。

[root@localhost Downloads]# ./jdk-6u33-linux-i586-rpm.bin

Unpacking...

Checksumming...

Extracting...

UnZipSFX 5.50 of 17 February 2002, by Info-ZIP (Zip-Bugs@lists.wku.edu).

inflating: jdk-6u33-linux-i586.rpm

inflating: sun-javadb-common-10.6.2-1.1.i386.rpm

inflating: sun-javadb-core-10.6.2-1.1.i386.rpm

inflating: sun-javadb-client-10.6.2-1.1.i386.rpm

inflating: sun-javadb-demo-10.6.2-1.1.i386.rpm

inflating: sun-javadb-docs-10.6.2-1.1.i386.rpm

inflating: sun-javadb-javadoc-10.6.2-1.1.i386.rpm

Preparing... ########################################### [100%]

...................

待提示

Press Enter to continue.....

回车完成JDK 的安装

卸载OpenJDK

---------------------------------------------------------------

1：在终端执行 rpm -qa|grep jdk 此时可以看到系统有两个jdk 如下

[root@localhost bin]# rpm -qa|grep jdk

jdk-1.6.0_33-fcs.i586

java-1.6.0-openjdk-1.6.0.0-57.1.10.1.fc15.i686

2：卸载系统自带的OpenJDK

root@localhost bin]# yum -y remove java java-1.6.0-openjdk-1.6.0.0-57.1.10.1.fc15.i686

Loaded plugins: langpacks, presto, refresh-packagekit

Setting up Remove Process

Resolving Dependencies

--> Running transaction check

---> Package java-1.6.0-openjdk.i686 1:1.6.0.0-57.1.10.1.fc15 will be erased

--> Processing Dependency: java-1.6.0-openjdk >= 1:1.6.0.0-55 for package: icedtea-web-1.0.2-2.fc15.i686

...........

Dependency Removed:

icedtea-web.i686 0:1.0.2-2.fc15

Complete!

配置JDK 环境变量

---------------------------------------------------------------

1：在终端打开profile文件

[root@localhost bin]# vi /etc/profile

2：在profile 文件中增加JDK环境变量

export JAVA_HOME=/usr/java/jdk1.6.0_33

export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin

保存并退出

3：使环境变量生效

[root@localhost bin]# source /etc/profile

[root@localhost bin]# java -version

java version "1.6.0_33"

Java(TM) SE Runtime Environment (build 1.6.0_33-b04)

Java HotSpot(TM) Client VM (build 20.8-b03, mixed mode, sharing)

OK，经过以上步骤就完成了JDK 的安装并卸载了Fedora 自带的OpenJDK。