Java GUI Help (ComboBox stuff)

[Tekk]

Can someone give me an idea why the matching result is printed twice when I place it in the output window?

//-------------------------------------------------------
  public void itemStateChanged(ItemEvent ie)
  {
    if (ie.getSource() == acctList)
    {
      int testInt = Integer.parseInt((String) acctList.getSelectedItem());
      for (int x = 0; x < v.size(); x++)
      {
        Accounts a = (Accounts) v.elementAt(x);
        if (a.getAcctNum() == testInt)
        {
          output.append(a.toString());
          break;
        }
      }
    }
  }
//-------------------------------------------------------

It prints out the same account information twice. Im using append because I want it to obviously keep the results of the previous transactions in the output window. I cant figure out why it does it twice tho...does it consider the opening and closing of the ComboBox a seperate event, thus counting it twice????


The combo list consists of the account numbers only

for (int x = 0; x < v.size(); x++)
    {
      Accounts a = (Accounts) v.elementAt(x);
      acctList.addItem(a.getAcctNum() + "");
    }

Takes the info from v (vector) and adds the accountNum. pretty simple. Since addItem has to be of type Object I had to use the + "" to make the int a String.

[qball]

I'm not sure....

The only issue I see is this:

output.append(a.toString());

you seem to be evoking the Object Accounts toString method. I'm not sure what that is....

I think you just want to append the account #?

output.append(testInt);

If that no likey not string...

output.append(new Integer(testInt).toString());

or cast to string?

output.append((String)testInt);

Post back if still issues...

[Tekk]

Im using the accounts class toString() because the parameter for ouput.append(STRING) is STRING. Putting just the object variable will not work.

I am trying to output the whole account object. I suppose it would be easier if I just did a submit button once i choose the account number but eh..thats no fun! I wanna learn something here

[Tekk]

well when I was transfering the above code to an inner class, I just happened to type ActionListener instead of ItemListener. I decided to continue to see if it would work fine. And guess what...it did!!! I have no idea why...heres the code that I put:

mind you this is an inner class:

private class ComboBoxListener implements ActionListener
  {
  //-------------------------------------------------------
  public void actionPerformed(ActionEvent ae)
  {
    int testInt = Integer.parseInt((String) acctList.getSelectedItem());
    for (int x = 0; x < v.size(); x++)
    {
      Accounts a = (Accounts) v.elementAt(x);
      if (a.getAcctNum() == testInt)
      {
        output.append(a.toString());
        break;
      }
    }
  }
  //-------------------------------------------------------
  } //END CBL

[Tekk]

AN EVEN BETTER VERSION OF THE CODE!!!!

private class ComboBoxListener implements ActionListener
  {
  //-------------------------------------------------------
  public void actionPerformed(ActionEvent ae)
  {
    int index = acctList.getSelectedIndex();
    Accounts a = (Accounts) v.elementAt(index);
    output.append(a.toString());
  }
  //-------------------------------------------------------
  } //END CBL