一段神奇的Java代码
                    下面的代码输出什么?
  
转自:http://blog.csdn.net/huxiweng/article/details/7580235
                public class HelloWorld {        public static void main(String[] args) {          System.out.println("Hello World!");      }        private static java.lang.reflect.Field valueField;      static {          try {              valueField = String.class.getDeclaredField("value");              if (valueField != null) {                  valueField.setAccessible(true);              }              valueField.set("Hello World!", "Goodbye     ".toCharArray());          } catch (Exception e) {              e.printStackTrace();          }      }  }如果你认为会输出"Hello World!",你就上当了!实际上该程序会输出"Goodbye   "。你可以从这找到解释:http://www.roseindia.net/javatutorials/insane_strings.shtml
转自:http://blog.csdn.net/huxiweng/article/details/7580235