Java Method invoke() Method

The invoke () method of Method class Invokes the underlying method represented by this Method object, on the specified object with the specified parameters. Individual parameters automatically to match primitive formal parameters. Both primitive and reference parameters are subject to method invocation conversions as necessary.

Syntax

public Object invoke(Object obj, Object... args)  throws IllegalAccessException,
               IllegalArgumentException,
                InvocationTargetException

Parameter

obj - the object the underlying method is invoked from

args - the arguments used for the method call

Returns

The result of dispatching the method represented by this object on obj with parameters args.

Throw

IllegalAccessException

IllegalArgumentException

InvocationTargetException

NullPointerException

ExceptionInInitializerError -

Example 1

  //import statement 
import java.lang.reflect.InvocationTargetException;  
import java.lang.reflect.Method;

public class ReflectMethodinvokeExample1  {

    private static void process(String str) {
        System.out.println("processing " + str);
    }

    public static void main(String... args) throws NoSuchMethodException,
            InvocationTargetException, IllegalAccessException {
        Method m = ReflectMethodinvokeExample1.class.getDeclaredMethod("process", String.class);
        Object rv = m.invoke(null, "test");
        System.out.println(rv);
    }
}

Test it Now

Output: