IllegalArgumentException：Invalid characters in hostname.
Bug 238843 -则抛出︰ 主机名中的字符无效

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java.lang.IllegalArgumentException: Invalid characters in hostname
    at java.net.HostPortrange.toLowerCase(Unknown Source)
    at java.net.HostPortrange.<init>(Unknown Source)
    at java.net.URLPermission$Authority.<init>(Unknown Source)
    at java.net.URLPermission.parseURI(Unknown Source)
    at java.net.URLPermission.init(Unknown Source)
    at java.net.URLPermission.<init>(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.URLtoSocketPermission(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(Unknown Source)
    at java.net.URLConnection.getContentType(Unknown Source)
    at com.sun.deploy.net.proxy.AbstractAutoProxyHandler.isSupportedINSFile(Unknown Source)
    at com.sun.deploy.net.proxy.AbstractAutoProxyHandler.retrieveContentOfPACFile(Unknown Source)
    at com.sun.deploy.net.proxy.AbstractAutoProxyHandler.contructLegacyPACScript_16(Unknown Source)
    at com.sun.deploy.net.proxy.AbstractAutoProxyHandler.init(Unknown Source)
    at com.sun.deploy.net.proxy.SunAutoProxyHandler.init(Unknown Source)
    at com.sun.deploy.net.proxy.DynamicProxyManager.reset(Unknown Source)
    at com.sun.deploy.net.proxy.DeployProxySelector.reset(Unknown Source)
    at com.sun.javaws.Main.initializeExecutionEnvironment(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)

解决方案：
怀疑安装路径中含有空格等非法字符。