Hi Markus,

Here is one example I have made for you. This will compile and run in both
Sun Java and J#.net.

public class test
{
   public test()
   {
       float a = 2.456335f;
       float b = 3.167745f;
       float sum = a + b;
       String format = ".00";    // The format you want.

       java.text.DecimalFormat f = new java.text.DecimalFormat( format );
       String outp = f.format( sum );  // The formatted result.

       // Textbox GUI
       java.awt.Frame fme = new java.awt.Frame();
       java.awt.Dialog dia = new java.awt.Dialog(fme);
       dia.setModal(true);
       dia.setSize(100,75);
       dia.setTitle("hello");

       // Add the result to a textbox/textfield.
       dia.add(new java.awt.TextField(""+outp));
       dia.setVisible(true);

       // Show the TextBox.
       dia.show();
     }

       public static void main(String[] arg)
       {
           new test();
       }
}

Regards,
Lars-Inge T?nnessen
www.larsinge.com