Re: Java Euro Converter

From:

Lew <lew@lewscanon.com>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 06 Oct 2007 10:04:53 -0400

Message-ID:

<-MOdnU2YvPKYC5ranZ2dnUVZ_oaonZ2d@comcast.com>

R.Demandt wrote:

But when compiling I get the following error's [sic]:
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);
^

The class of 'this' is 'Euro', which is not an ActionListener. It's all in
the compiler message.

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);
^

The class of 'this' is 'Euro', which is not an ActionListener. It's all in
the compiler message.

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();
^

You cannot divide by a String, which is what getText() returns. It's all in
the compiler message.

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();
^

You cannot multiply by a String, which is what getText() returns. It's all in
the compiler message.

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

Study and learn from:
<http://java.sun.com/docs/books/tutorial/index.html>

You need to master certain basics.

--
Lew