Method coco= d.getMethod("print", new Class[]{int.class,int.class});

a1.print(10, 20);

//Object go= coco.invoke(a1, new Object[]{2,3});

Object deo= coco.invoke(a1, 10,10);

Method lwk= d.getMethod("print", String.class,String.class);

deo= lwk.invoke(a1, "wode","nadi");//这一行就不报错呢？

String deo= (String) lwk.invoke(a1, "aaaa","vvvv"); //为什么这一行输出会报错呢？上面的就不报错了

String deo1 =(String) lwk.invoke(a1, "ddd","cccc");

a1.print("nigag", "gagog");