java 反射 get方法_java反射调用方法

I’m working with the basics of Java reflection and observing information on methods of classes. I need to get a method that matches specifications as described by the getMethod() function. However, when I do this I get a NoSuchMethodException, and I was hoping you could tell me why my implementation is incorrect.

static void methodInfo2(String className) throws ClassNotFoundException,

NoSuchMethodException{

Class cls = null;

try{

cls = Class.forName(className);

} catch(ClassNotFoundException e){

e.printStackTrace();

}

System.out.println(“Cls: “+cls);

Method method1 = cls.getMethod(“test”, null);

System.out.println(“method1: “+method1);

}

EDIT1:When I print out “Cls: “+cls, the output is “Cls: class a8.myclass2”. Why does it append the class part? (the a8 is correct, so don’t worry about that) /EDIT1

This is the function I use to read in a class from my main function, and then I want to getMethod() with the parameters “test” and null, where “test” is the name of the method and null means the method has no parameters. The class I am reading in is called myclass2 which is here:

package a8;

public class myclass2 {

void test(){

//”takes no parameters”

//”returns bool”

//”name starts with test”

//return true;

}

}

As you can see, the method does infact exist in the class. If you could point out my mistake, I would really appreciate it.

解决方案

Make your test method public. I believe Class.getMethod() is limited to public methods.