Using XML::XSH2, a wrapper around XML::LibXML: 
open nightly.xml ;
xinsert text 'JDK 1.8.0_40' replace //jdk/text() ;
save :b ;

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In reply to Re^2: modifying xml file and saving them in the same file using Perl and XML:Twig by choroba
in thread modifying xml file and saving them in the same file using Perl and XML:Twig by 92sai

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