Invoke static methods using Reflection

Procedure is similar like previous post, except, you supply null instead of an object instance for the 'invoke' method.

public class Add {
    static int add(int a, int b){
        return (a+b);
    }
    
    static int add(int a, int b, int c){
        return a+b+c;
    }
    
    static float add(float a, float b){
        return (a+b);
    }
    
    static float add(float a, float b, float c){
        return (a+b+c);
    }
}

import java.lang.reflect.*;

public class RunMethod {
    public static void main(String arg[]) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException{
        Class myClass = Class.forName("Add");
        Add obj = new Add();
        
        Method method = myClass.getDeclaredMethod("add", int.class, int.class);
        Object result = method.invoke(null, 1, 2);
        System.out.println(result);
        
        method = myClass.getDeclaredMethod("add", float.class, float.class);
        result = method.invoke(null, 1.05f, 2.07f);
        System.out.println(result);
        
        method = myClass.getDeclaredMethod("add", int.class, int.class, int.class);
        result = method.invoke(null, 1, 2, 3);
        System.out.println(result);
        
        method = myClass.getDeclaredMethod("add", float.class, float.class, float.class);
        result = method.invoke(null, 1.05f, 2.07f, 3.06f);
        System.out.println(result);
    }
}

Output

3
3.12
6
6.18

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