#001 public String func(String s, Hashtable ht)#002 {#003 …System.out.println("func invoked"); return s;#004 }#005 public static void main(String args[])#006 {#007 Class c = Class.forName("Test");#008 Class ptypes[] = new Class[2];#009 ptypes[0] = Class.forName("java.lang.String");#010 ptypes[1] = Class.forName("java.util.Hashtable");#011 Method m = c.getMethod("func",ptypes);#012 Test obj = new Test();#013 Object args[] = new Object[2];#014 arg[0] = new String("Hello,world");#015 arg[1] = null;#016 Object r = m.invoke(obj, arg);#017 Integer rval = (String)r;#018 System.out.println(rval);#019 }
倒数第二句不懂。r是Object类,是可以强制转化为String类是没错,但是为什么要赋给Integer呢?啥意思啊
倒数第二句不懂。r是Object类,是可以强制转化为String类是没错,但是为什么要赋给Integer呢?啥意思啊
见http://www.j2medev.com/Article/Class3/Class7/200604/1995.html
图8