Getting selected item index from Combo : Combo « SWT « Java Tutorial

1. Java Tutorial
2. SWT
3. Combo

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class ComboSelectedIndex {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Show Message Box");
    shell.setLayout(new GridLayout(2, false));
    new Label(shell, SWT.NONE).setText("Icon:");
    final Combo icons = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
    icons.add("A");
    icons.add("B");
    icons.add("C");
    icons.select(0);

    new Label(shell, SWT.NONE).setText("Buttons:");
    final Combo buttons = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
    buttons.add("1");
    buttons.add("2");
    buttons.select(0);

    new Label(shell, SWT.NONE).setText("Return:");
    final Label returnVal = new Label(shell, SWT.NONE);
    returnVal.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

    Button button = new Button(shell, SWT.PUSH);
    button.setText("Show Message");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {

        returnVal.setText("");

        returnVal.setText(icons.getSelectionIndex() + " " + buttons.getSelectionIndex());
      }
    });
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }
}

17.11.Combo
	17.11.1.	Introducing Combo
	17.11.2.	Create a dropdown Combo
	17.11.3.	Create a read-only (non-editable) Combo
	17.11.4.	Create a 'simple' Combo
	17.11.5.	Getting selected item index from Combo
	17.11.6.	Retrieve the content text of the text field of a combo
	17.11.7.	Programmatically select an item from the list
	17.11.8.	Deselect an item
	17.11.9.	Getting Items
	17.11.10.	Setting Items
	17.11.11.	Finding Items
	17.11.12.	Adding Items
	17.11.13.	Add method appends an item to the end of the list
	17.11.14.	Removing Items
	17.11.15.	To remove multiple items
	17.11.16.	Removes the first found item with given text
	17.11.17.	Creating a Combo with Sorted List