Java by API/org.eclipse.swt.custom/PopupList

new PopupList(Shell shell)

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.PopupList;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class MainClass {
  public static void main(String[] a) {
    
    final Display d = new Display();
    final Shell shell = new Shell(d);
    shell.setSize(250, 200);
    
    shell.setLayout(new RowLayout());
    Button button = new Button(shell, SWT.PUSH);
    button.setText("Push Me");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        PopupList list = new PopupList(shell);
        String[] OPTIONS = { "A", "B", "C"};
        list.setItems(OPTIONS);
        String selected = list.open(shell.getBounds());
        System.out.println(selected);
      }
    });
    
    
    shell.open();
    while (!shell.isDisposed()) {
      if (!d.readAndDispatch())
        d.sleep();
    }
    d.dispose();
  }
}

PopupList: open(Rectangle rect)

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.PopupList;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class MainClass {
  public static void main(String[] a) {
    
    final Display d = new Display();
    final Shell shell = new Shell(d);
    shell.setSize(250, 200);
    
    shell.setLayout(new RowLayout());
    Button button = new Button(shell, SWT.PUSH);
    button.setText("Push Me");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        PopupList list = new PopupList(shell);
        String[] OPTIONS = { "A", "B", "C"};
        list.setItems(OPTIONS);
        String selected = list.open(shell.getBounds());
        System.out.println(selected);
      }
    });
    
    
    shell.open();
    while (!shell.isDisposed()) {
      if (!d.readAndDispatch())
        d.sleep();
    }
    d.dispose();
  }
}

PopupList: setItems(String[] items)

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.PopupList;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class MainClass {
  public static void main(String[] a) {
    
    final Display d = new Display();
    final Shell shell = new Shell(d);
    shell.setSize(250, 200);
    
    shell.setLayout(new RowLayout());
    Button button = new Button(shell, SWT.PUSH);
    button.setText("Push Me");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        PopupList list = new PopupList(shell);
        String[] OPTIONS = { "A", "B", "C"};
        list.setItems(OPTIONS);
        String selected = list.open(shell.getBounds());
        System.out.println(selected);
      }
    });
    
    
    shell.open();
    while (!shell.isDisposed()) {
      if (!d.readAndDispatch())
        d.sleep();
    }
    d.dispose();
  }
}