swt conbo用法

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import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class ComboTest {

    public static void main(String[] args) {
        String[] WEEK = { "Monday", "Tuesday", "Wednesday"};
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setBounds(500, 100, 500, 300);
        shell.setText("Combo");
        shell.setLayout(new GridLayout(3, true));

        //创建Combo组件，为下拉列表样式
        final Combo dc = new Combo(shell, SWT.DROP_DOWN);
        dc.setItems(WEEK);
        dc.addSelectionListener(new SelectionAdapter(){
            @Override
            public void widgetSelected(SelectionEvent e) {
                String key = ""+dc.getSelectionIndex();
                String value = dc.getText();
                System.out.println("key:"+key+"    value:"+value);
            }
        });

        //创建Combo组件，为下拉列表样式，且只读
        final Combo rc = new Combo(shell, SWT.DROP_DOWN | SWT.READ_ONLY);
        //在界面中显示的是123
        rc.add("123");
        //第一个值是key从0开始 ,第二个值为value
        rc.setData("0", "321");

        rc.add("456");
        rc.setData("1", "654");

        rc.addSelectionListener(new SelectionAdapter(){
            @Override
            public void widgetSelected(SelectionEvent e) {
                String key = ""+rc.getSelectionIndex();
                System.out.println("key:"+key);
                String value = (String) rc.getData(key);
                System.out.println("key:"+key+"    value:"+value);
            }
        });
        //rc.setItems(MONTHS);
        //创建Combo组件，为List组件样式
        Combo sc = new Combo(shell, SWT.SIMPLE);
        sc.setItems(WEEK);
        shell.open();
        while (!shell.isDisposed()) {
           if (!display.readAndDispatch()) {
               display.sleep();
          }
     }

     display.dispose();

    }

}

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