Errore esecuzione SwingSet3.jnlp

[biagiopas]

ciao sto seguendo un tutorial java
ho scaricato il file SwingSet3.jnlp è un file dimostrativo per Swing si scarica da
download.java.net/javadesktop/swingset3/SwingSet3.jnlp

se provo a scaricarlo ed eseguirlo si visualizza il messaggio di errore

java_errore_swingset3.jpg

cliccando Dettagli

Errore: download.java.net

Eccezione

java.net.UnknownHostException: download.java.net at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at sun.net.NetworkClient.doConnect(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.<init>(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClie nt(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0( Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(U nknown Source) at sun.net.www.protocol.http.HttpURLConnection.connect(Unknow n Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream 0(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream (Unknown Source) at com.sun.deploy.net.HttpUtils.followRedirects(Unkno wn Source) at com.sun.deploy.net.BasicHttpRequest.doRequest(Unkn own Source) at com.sun.deploy.net.BasicHttpRequest.doGetRequestEX (Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.checkUpd ateAvailable(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.isUpdate Available(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResou rce(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResou rce(Unknown Source) at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unkn own Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.launch(Unknown Source) at com.sun.javaws.Main.launchApp(Unknown Source) at com.sun.javaws.Main.continueInSecureThread(Unknown Source) at com.sun.javaws.Main.access$000(Unknown Source) at com.sun.javaws.Main$1.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

ho provato ad entrare nel pannell di amministrazione di java >> tab Sicurezza
nelle eccezioni ho aggiunto: http://download.java.net/javadesktop/swingset3

mi sapete dire com intervenire per avviare SwingSet3.jnlp?
ps cosa è un file .jnlp?
grazie da adesso perle risposte


so: win7x64
jdk1.7.0_04
jdk1.8.0_05
jre7
jre8