SWT 菜单

public class MenuTest {

  public static void main(String[] args) {
      Display display = new Display();//创建一个display对象
      final Shell shell = new Shell(display);//shell是程序的主窗体
      shell.setText("菜单示例");
      Menu mainMenu = new Menu(shell, SWT.BAR);
      shell.setMenuBar(mainMenu);
      //Menu mainMenu = new Menu(shell,SWT.POP_UP);//创建弹出式菜单
      //shell.setMenu(mainMenu);//创建弹出式菜单
      {
          //"文件"项
          MenuItem fileItem = new MenuItem(mainMenu, SWT.CASCADE);
          fileItem.setText("文件&F");
          //"文件"菜单
          Menu fileMenu = new Menu(shell, SWT.DROP_DOWN);
          fileItem.setMenu(fileMenu);
          {
              //"新建"项
              MenuItem newFileItem = new MenuItem(fileMenu, SWT.CASCADE);
              newFileItem.setText("新建&N");
              //"新建"菜单
              Menu newFileMenu = new Menu(shell, SWT.DROP_DOWN);
              newFileItem.setMenu(newFileMenu);
              {
                  //"新建项目"项
                  MenuItem newProjectItem = new MenuItem(newFileMenu, SWT.PUSH);
                  newProjectItem.setText("项目\tCtrl+Shift+N");
                  //设置快捷键
                  newProjectItem.setAccelerator(SWT.CTRL+SWT.SHIFT+'N');
                  //添加事件监听
                  newProjectItem.addSelectionListener(new SelectionAdapter() {
                  @Override
                  public void widgetSelected(SelectionEvent e) {
                  Text text = new Text(shell, SWT.MULTI | SWT.BORDER | SWT.WRAP);
                     text.setBounds(10, 10, 100, 30);
                     text.setText("你选择了“新建项目”");
                  }
                  });
                  new MenuItem(newFileMenu, SWT.SEPARATOR);
                  //"包"项
                  new MenuItem(newFileMenu, SWT.PUSH).setText("包");
                  //"类"项
                  new MenuItem(newFileMenu, SWT.PUSH).setText("类");
               }
               //"打开"项
               MenuItem openFileItem = new MenuItem(fileMenu, SWT.CASCADE);
               openFileItem.setText("打开&O");
               //"退出"项
               MenuItem exitItem = new MenuItem(fileMenu, SWT.CASCADE);
               exitItem.setText("退出&E");
            }
            //"帮助"项
            MenuItem helpItem = new MenuItem(mainMenu, SWT.CASCADE);
            helpItem.setText("帮助&H");
         }
         shell.pack();
         shell.open();
         while(!shell.isDisposed()){//如果主窗体没有关闭则一直循环
            if(!display.readAndDispatch()){//如果display不忙
               display.sleep();//休眠
            }
         }
         display.dispose();//销毁display
     }
 }