Reflection to invoke setter / getter method a small problem

Watching "java development real classic" reflection chapter , invoked by reflection setter and getter, my own experiments encountered a problem , how the return value of the getter to return ?
code book is this:

  public static void setter(Object obj,String att,Object value,Class<?>type){
  		try{
  			Method met = obj.getClass().getMethod("set"+initStr(att),type);
  			met.invoke(obj, value);
  		}catch(Exception e){
  			e.printStackTrace();
  		}
  	}
  	public static void getter(Object obj,String att){
  		try{
  			Method met = obj.getClass().getMethod("get"+initStr(att));
  			System.out.println(met.invoke(obj));
  		}catch(Exception e){
  			e.printStackTrace();
  		}
  		return temp;
  	}
  

I want to return the getter method return value , write how not ah ?

  public static Object getter(Object obj,String att){
  		try{
  			Method met = obj.getClass().getMethod("get"+initStr(att));
  			Object temp = met.invoke(obj);
  		}catch(Exception e){
  			e.printStackTrace();
  		}
  		return temp;
  	}
  

invoke methods do not have a return value ?
------ Solution ---------------------------------------- ----

try{
              Method met = obj.getClass().getMethod("get"+initStr(att));
              Object temp = met.invoke(obj);
          }catch(Exception e){
              e.printStackTrace();
          }
          return temp;
  改为
   Object temp=null;
  try{
              Method met = obj.getClass().getMethod("get"+initStr(att));
              temp = met.invoke(obj);//这里定义是局部变量，return娶不到的。
          }catch(Exception e){
              e.printStackTrace();
          }
          return temp;
  

------ For reference only ----------------------------------- ----
Thank you, understand