java - Cannot resolve hostname (localhost) on eclipse -

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hey i'am using eclipse run java applications when running application showing error

unable load page

problem occurred while loading url http://localhost:8080/loan_management/admin.html

cannot resolve hostname (localhost)

how resolve problem?

the error you're getting due server (tomcat) not running or it's not configured properly.
steps setup tomcat server in eclipse: https://www.eclipse.org/webtools/jst/components/ws/1.0/tutorials/installtomcat/installtomcat.html

if using proxy in server need configure settings well. can set required properties when starting jvm.
in eclipse run-> run configuration-> argument tab, set vm argument

-dhttp.proxyhost=your/proxy/server.com  -dhttp.proxyport=80

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