萬花筒

// Fig. 3.4: GradeBook.java

// Class declaration with a method that has a parameter.

// U3 P.099

public class GradeBook
{
   // display a welcome message to the GradeBook user
   public void displayMessage ( String courseName )
   {
      System.out.printf ( "XXX\n%s!\n" , courseName);
   } // end method displayMessage

} // end class GradeBook

圖3.4　宣告帶有一個方法的類別，該方法中含有一個參數


java.GradeBook
出現：Exception in thread "main" java.lang.NoSuchMethodError: main