run configuration for scala in eclipse

hi i have to run a scala programme. i got the error Main class not found.then i open preferences and in scala application. m开发者_开发百科ain class column no main class specified . can u please tell me what must i have to fill in that colummn to run my programme.please help me.thanks in advance

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Can you provide any extra information?

I've just created a Scala project, right click new Scala Project. Keep all defaults. Created the following object

object HelloWorld {

    def main(args: Array[String]): Unit = { println("Hello World!") }

 }

Right click on the file in the Package Explorer and select "Run As" -> "Scala Application"

I'm using Eclipse Version: 3.5.2 Build id: M20100211-1343

Plugin version 1.0.0.201011220809

Check you are in the Scala Perspective and not Java.