Cocoa Java Grandé Latté

/* Converter */

import com.apple.cocoa.foundation.*;
import com.apple.cocoa.application.*;

public class Converter {

   public double convertAmount(double amt, double rate){
      return (amt * rate);
   }

}

/* ConverterController */

import com.apple.cocoa.foundation.*;
import com.apple.cocoa.application.*;

public class ConverterController {

    public Converter converter; /* IBOutlet */
    public NSTextField dollarField; /* IBOutlet */
    public NSTextField rateField; /* IBOutlet */
    public NSTextField totalField; /* IBOutlet */

    public void convert(Object sender) { /* IBAction */

      double rate, amt, total;

      amt = dollarField.doubleValue();
      rate = rateField.doubleValue();

      total = converter.convertAmount(amt,rate);

      totalField.setDoubleValue(total);

      rateField.selectText(this);
    }

}