Hi and thanks for viewing my thread,
i have a problem with JComboBox.
in my situation, i have a code that display JTextArea and JComboBox.
this is my code:

public class JScrollPanes extends JApplet
{
  //--------------------------------------------------
 
    static String[] t_value2 = { "2", "3", "4", "5", "6" };
    
   // -----------------------------------------------

  private JButton generate_btn = new JButton("GO ");

  private Label label = new Label ("Enter Parameter Values");
  private Label labelt = new Label ("Choose t Value");

  private JTextArea
  t1 = new JTextArea("", 1, 20),
  t3 = new JTextArea("", 6, 20),
  t4 = new JTextArea("",13, 20);

  private JComboBox t2 = new JComboBox(t_value2);

class B4L implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
     {

        t3.setText("");
        t4.setText("");
      // get input from JTextArea
       String data_str=t1.getText();
     // get input from JComboBox...how??
     // count parameter
       int p = data_str.replaceAll("[^,]","").length();
       p++; // as an array size
       data = new int [p];
       int k =0;
       t3.append("Pairwise Test Set\n");
       t3.append("Parameters ="+Integer.toString(p)+"\n");
     }
  }

public void init()
  {
     //setting and initializing....
  }

  public static void main(String[] args)
  {
    run(new JScrollPanes(), 300, 500);
  }

  public static void run(JApplet applet, int width, int height)
  {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(applet);
    frame.setSize(width, height);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
}

i hope u guys understand my code....i cut the rest and juz show my problem...as u can see my combobox as t2...
my questions:
1) How to get index from dropdown menu. like JtextArea we use getText==> String data_str=t1.getText();
How we do in JComboBox. i want to get the data because i want to convert string to integer.
2) How to display the menu that user selected in t3(textarea 3)

comboBox.getSelectedItem().toString()
this code is used to get the selected item in combo box

comboBox.getSelectedItem().toString()
this code is used to get the selected item in combo box

yup. i got it!!

1) To get d item from dorpdown menu:
String tvalue_str=(String)t2.getSelectedItem();

2) this is d way i write to display the selected item :
int3.append("Value of T ="+tvalue_str+"\n");

thanks sennat_26

yup. i got it!!

1) To get d item from dorpdown menu:
String tvalue_str=(String)t2.getSelectedItem();

2) this is d way i write to display the selected item :
int3.append("Value of T ="+tvalue_str+"\n");

thanks sennat_26

I would like to add that in the same way you added String to the JComboBox, you can add objects:

class SomeObject {
  // many attributes
}
JComboBox t2 = new JComboBox();
// add some SomeObject objects to the JComboBox 


SomeObject so = (SomeObject)t2.getSelectedItem();

Also what will be displayed at the JComboBox will be determined by the toString method of SomeObject class. So don't forget to override it:

class SomeObject {
  // many attributes

  public Stirng toString() {
    return ""; // return whatever you want to be displayed at the options of ComboBox
  }
}
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