import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
//Accessing Private methods using Reflection
public class Test {
public static void main(String ag[])
{
A obj=new A();
try {
Class c=obj.getClass();
Method method=c.getDeclaredMethod("msg", null);
//System.out.println(method);
try {
method.setAccessible(true);
method.invoke(obj,null);//Calling Private method of a class.
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
////////////second class************Having Private methods
class A
{
private void msg()
{
System.out.println("In class A of private Mehod");
}
}
//Hi Guys we can access the private fields of a java class using reflection in the same way.
Thanks
Pankaj Kumar Singh
What if constructor is not exposed or overriden.
ReplyDelete@Kunal : you can get the constructor and make it accessable true using reflection to navigate that class.
ReplyDeleteReflection provides many ways to expose the constructor like as follows
Constructor<\A\> constructor = A.class.getDeclaredConstructor();
constructor.setAccessible(true);