[英]Error while invoking method through reflection
Following are the two cases of Methods which I invoke using reflection 以下是我使用反射调用的方法的两种情况
actualoutput = mgenerateouput.invoke(outputclassinst,obj);
obj
is Object
array Type which contains Section
Type object in obj[0]
obj
是Object
数组类型,其中包含obj[0]
中的Section
Type对象
Case 1: 情况1:
public Student[] expectedOutputString(Section sec){
//Object arra[] = Section.makeSection((String[])params[0]);
ReportCard rc = new ReportCard();
Student[] exOut = rc.orderClass(sec);
return exOut;
}
it's working in first case perfect but in second case below when i declare parameter type as Object
i get IllegalArgumentException
. 它在第一种情况下工作完美,但在下面的第二种情况下,当我将参数类型声明为
Object
我得到了IllegalArgumentException
。
Case 2: 情况2:
public Student[] expectedOutputString(Object params[]){
//Object arra[] = Section.makeSection((String[])params[0]);
ReportCard rc = new ReportCard();
Student[] exOut = rc.orderClass((Section)params[0]);
return exOut;
}
[ [
Could be a typo: 可能是拼写错误:
rc.orderClass((Section)params[0]); // was: Second
^^^^^^^
Code 2 does not declare the parameter as Object but as Object[], ie array of objects. 代码2并不将参数声明为Object,而是声明为Object [],即对象数组。 So your obj[0] must be an array of objects, too.
因此,您的obj [0]也必须是对象数组。 Edit: Or the other way around: Code 2 should expect an Object instead of Object[].
编辑:或者反过来:代码2应该期望使用Object而不是Object []。
Why not using variable parameters in Case 2? 为什么在案例2中不使用可变参数? Like:
喜欢:
public Student[] expectedOutputString(Object ... params){
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.