JAVA设计模式english

				import java.awt.*;
				public class checkCommand extends Checkbox
				      implements Command
				{
				   Command cmd;
				   public checkCommand(String caption, CheckboxGroup grp, Command comd)
				   {
				      super(caption, grp, false);
				      cmd  = comd;
				   }
				   public void Execute()
				   {
				      cmd.Execute();
				   }
				}