I would suggest you to use the below command to download jdk  as the links are upgraded.

Command: wget --no-cookies --no-check-certificate --header "Cookie: oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/7u55-b13/jdk-7u55-linux-x64.tar.gz" -O jdk-7-linux-x64.tar.gz
 
Command: tar -xvf jdk-7-linux-x64.tar.gz
 
Hope this resolves your query.
 
Please feel free to revert if you need any further help we will be glad to assist you.

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