Can I use Java for high-volume traffic Web site like a bidding Web site?
Most people think Java is too slow to be used for a public Web site with high volume triffic. So I wonder what to use: PHP, Perl, Python, or Java? Is Java only for enterprise internal use (traffic is small)?
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No I would not use Java, it is really too slow. I would use .NET technologies ASP.NET and C# to develop the site along with an SQL Server database.
Yes. You definitely can use Java for a high-volume web site. You can also use C# or any of the languages you have listed in your question. Java’s reputation for being slow comes from fat/thick client applications – not web applications. The performance of an application often has to do with it’s implementation. You can write slow web applications in any language as well as write fast applications in those same languages. Good design and implementation is the main key to performance, not the language.