为了搭建测试环境
1 在vmware 下安装了x86-64-bit的linux
2 新建虚拟机中选择 iso，然后一路next
3 root登入新的虚拟机
4 查看有无安装jdk命令：#java -version
5 yum安装jdk
首先，我们来看看yum库是否有java安装包
[root@233797 www.ctohome.com]yum -y list java*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.grikare.com
* extras: centos.mirror.facebook.net
* rpmforge: ftp-stud.fht-esslingen.de
* updates: mirror.grikare.com
Excluding Packages in global exclude list
Finished
Available Packages
java-1.4.2-gcj-compat.i386 1.4.2.0-40jpp.115 base
java-1.4.2-gcj-compat-devel.i386 1.4.2.0-40jpp.115 base
java-1.4.2-gcj-compat-javadoc.i386 1.4.2.0-40jpp.115 base
java-1.4.2-gcj-compat-src.i386 1.4.2.0-40jpp.115 base
java-1.6.0-openjdk.i386 1:1.6.0.0-1.23.1.9.10.el5_7 updates
java-1.6.0-openjdk-demo.i386 1:1.6.0.0-1.23.1.9.10.el5_7 updates
java-1.6.0-openjdk-devel.i386 1:1.6.0.0-1.23.1.9.10.el5_7 updates
java-1.6.0-openjdk-javadoc.i386 1:1.6.0.0-1.23.1.9.10.el5_7 updates
java-1.6.0-openjdk-src.i386 1:1.6.0.0-1.23.1.9.10.el5_7 updates
java_cup.i386 1:0.10-0.k.6jpp.1 base
java_cup-javadoc.i386 1:0.10-0.k.6jpp.1 base
java_cup-manual.i386 1:0.10-0.k.6jpp.1 base
javacc.i386 4.0-3jpp.3 base
javacc-demo.i386 4.0-3jpp.3 base
javacc-manual.i386 4.0-3jpp.3
然后我们安装java1.6.x，怎样使用yum安装java？ 怎么用yum安装jdk？
[root@233797 www.ctohome.com]yum -y install java-1.6.0-openjdk*
查看yum安装java的结果，安装完成后，执行java -version
[root@233797 www.ctohome.com]java -version
java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.10) (rhel-1.23.1.9.10.el5_7-i386)
OpenJDK Client VM (build 19.0-b09, mixed mode)
6 安装成功