How do I connect to the net through a proxy server?

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Index:Java 2 Standard Edition (J2SE):Java 2 JDK:Networking (java.net.*)

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How do I connect to the net through a proxy server?

An applet will automatically use the browser settings. With an application, the proxy server can be specified with the following properties: proxySet, proxyHost and proxyPort.

They can either be set at the command line or in the source.

At command line:

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In source:

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It could be that the proxy server requires you to authenticate with a username + password. This request has to be in the form "username:password" encoded in base64. A converter to base64 can be found in the package sun.misc - BASE64Encoder. The final call is to setRequestProperty which will change the http header as to get you through the proxy.
Code snippet:

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Further Information

Author of answer: Joris Van den Bogaert

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