如何在Fedora 17 18 19 20 21 22 23 系统中安装 openjdk 1.6 与 1.7 1.8 共存

首先在高版本Fedora中，没有java-openjdk-1.6包，需要在网上下载，比如CentOS 7中的java-openjdk-1.6包：java-1.6.0-openjdk-1.6.0.36-1.13.8.1.el7_1.x86_64.rpm，实测可在Fedora 20中安装。

以下为转载，主要注意安装提示“

java-1.7.0-openjdk

obsoletes

java-1.6.0-openjdk

”时，使用

rpm -nodeps就可以了，然后还需要：update-alternatives --config java和update-alternatives --config javac，指定1.6版本：

yum install java-1.6.0-openjdk --releasever=16 --nogpgcheck

(

--nogpgcheck

because

yum

complains of not having the key for Fedora 16, maybe there are better ways to solve this)

But this shows, that

java-1.7.0-openjdk

obsoletes

java-1.6.0-openjdk

and skips installation. And it shows that the package

xorg-x11-fonts-Type1

is needed. So I did

yum install xorg-x11-fonts-Type1

and then I used the openjdk package which

yum

downloaded but refused to install because of theobsoletes warning

rpm --nodeps -ihv /var/cache/yum/x86_64/16/updates/packages/java-1.6.0-openjdk-1.6.0.0-68.1.11.5.fc16.x86_64.rpm

(

--nodeps

for overriding the obsoletes warning)

Now I have both java 1.6 and java 1.7 on my system. Java 1.7 is my default. And Java 1.6 is in

/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java

.

PS: There won't be any conflicts when you install both 1.7 and 1.6. The reason for removing 1.6 from Fedora 17 was, that OpenJDK6 willno
longer get security updates after November 2012.

PS: Please vote up, if you liked my answer.

#update-alternatives --config java

There are 2 programs which provide 'java'.

Selection Command

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

*+ 1 /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.79-2.5.5.0.fc20.x86_64/jre/bin/java

2 /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java

Enter to keep the current selection[+], or type selection number: 2

# update-alternatives --config javac

There is 1 program that provides 'javac'.

Selection Command

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

*+ 1 /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.79-2.5.5.0.fc20.x86_64/bin/javac

Enter to keep the current selection[+], or type selection number: