My Next button is not working. Please Help!

Question

Hello, everyone.
Thank you very much for stopping by my question.
I'm trying to make this work all day today. I'm out of idea...
SortedMap m = new TreeMap()is used to sort the collection.
I want to show next record(name and payrate) in the collection if there's any. Every time I try the code, I get 'Class Cast Exception'
What am I doing wrong? The following is the code.
<CODE>
// Next button
if (e.getSource().equals(nextBtn))
// Show an error message if the collection is empty.
if (m.isEmpty())
msg.setText("No Record is in the Collection");
//Instantiate an Inerator on the collection's key set and use it to
// display next record.
Iterator pointer = m.keySet().iterator();
if (pointer.hasNext())
msg.setText("The records: "+ (String)m.get(pointer.next()));
// Show a message if there is no more record available in the collection.
else {
msg.setText("No More Record");
</CODE>
Please give me suggestion/advice.
Thanks in advance.

Answer 1

hi, Radish21.
I think I'm not adding payRate into the collection succesfully.
I changed the code as below:
Iterator pointer = m.keySet().iterator();
if (pointer.hasNext()){
  Object key = pointer.next(); // get the next key.
  Object value = m.values(); // get the value for that key.
  msg.setText(key +"," +value);
}I got the following message in message area:
Eric,[project06.App$Employee[Eric,0,0,0x0,invalid,layout=java.awt.FlowLayout], project06.App$Employee[Maya,0,0,0x0,invalid,layout=java.awt.FlowLayout], project06.App$Employee[Naoyo,0,0,0x0,invalid,layout=java.awt.FlowLayout]]
I see the names I added, but don't see the payrate there.
The following is the code to add the name/payrate into the collection:
m.put(nameField.getText(),  new Employee (nameField.getText(), Double.parseDouble(payRateField.getText())));Isn't this adding payRate?
I'm sorry to ask you so many questions.
I do really appreciate your time and consideration.
Thank you