java - Upgrade from Netbeans 7.2.1 to Netbeans 7.3.1 classpath error -


i upgraded netbeans 7.2.1 netbeans 7.3.1. have existing gwt project using jdk 7 ee. upon setting netbeans 7.3.1 point glassfish 4 , redeploying new server, see warning in output window of netbeans:

warning: [options] bootstrap class path not set in conjunction -source 1.6 

what warning , should concerned?

i went gwt project properties , found drop-down pointing jdk 6. changed jdk 7 , warning went away.


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