TreeMap 2

[ALongpwneage]

I am displaying the TreeMap in a gui interface, and i am trying to return both the current and previous keys, but it is only returning one. If anyone has a idea on how to return both it would be much appreciated. My code is below.


private void saveJButtonActionPerformed( ActionEvent event )
{

//Creates the tree map and the values that will be placed in the map
TreeMap hm = new TreeMap();
hm.put("Average Attendance ", subtotalJTextField.getText());
hm.put("1)",Name1JTextFeild.getText());
hm.put("Attendance", Members1JTextFeild.getText());
hm.put("2)",Name2JLabel.getText());
hm.put("Attendance", Members2JTextFeild.getText());
hm.put("3)",Name3JLabel.getText());
hm.put("Attendance", Members3JTextFeild.getText());
Set set = hm.entrySet();

Iterator i = set.iterator();


//displays the values in the map
while( i.hasNext())
{

Map.Entry me = (Map.Entry)i.next();
DisplayAttendance.setText(me.getKey() + " : " + me.getValue());
System.out.println(me.getKey() + " " + me.getValue());


}

 

[Bong]

Where are you trying to keep the previous key/value? Each loop, me is always the next entry. In order to display the previous one at the same iteration, you need to have saved it off in the previous iteration.

_________________
Bob Rashkin

 

[Diancecht]

You're using the same key, "Attendande" for three objects, so the only one that remains is the last one.

http://java.sun.com/j2se/1.3/docs/api/java/util/TreeMap.html#put(java.lang.Object, java.lang.Object)

And you're setting the text in each iteration, so only the last will remain.

Appart from that, the code works fine.

Cheers,
Dian

 

[ALongpwneage]

how would i save it ?

 

[Bong]

something like:
oldString = me.getKey() + " " + me.getValue();
at the end of the loop?

_________________
Bob Rashkin

 

[ALongpwneage]

Should I put in the while loop?

 

[ALongpwneage]

How should i declare oldString?

 

[Diancecht]

When you get the loop, you will only have the value for the third textfield.

Could you explain with more detais what are you trying to do?

Cheers,
Dian

 

[aHash]

Can you post what your are displaying?
Is it displaying 3 times or only once?

if you are trying to any particular entry, you should reference it with th correct index..

I second dian here, please be more specific about what you are trying to achieve..