Thanks for reply.
i used sudo yum install java-1.7.0-openjdk icedtea-web and it installed
Loaded plugins: langpacks, presto, refresh-packagekit
Package 1:java-1.7.0-openjdk-1.7.0.9-2.3.4.fc17.i686 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package icedtea-web.i686 0:1.3.1-1.fc17 will be installed
It then installed icedtea-web.i686 0:1.3.1-1.fc17 .
Then I used following command to open the file but it failed
$ seamcat.jnlp
bash: seamcat.jnlp: command not found...
What should I do now.
Regards