Java Reflection Constructor Invoke invokeConstructor(Class clazz, Object... parameters)

Description

invoke Constructor

License

Open Source License

Declaration

public static Object invokeConstructor(Class<?> clazz, Object... parameters) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.lang.reflect.*;

public class Main {
    public static Object invokeConstructor(Class<?> clazz, Object... parameters) {
        try {//from ww w. j  a v  a 2  s  .  co m
            Constructor constructor = clazz.getConstructor(convertToMethodParameters(parameters));
            return constructor.newInstance(parameters);
        } catch (NoSuchMethodException | InstantiationException | IllegalAccessException
                | InvocationTargetException e) {
            e.printStackTrace();
            return null;
        }
    }

    private static Class<?>[] convertToMethodParameters(Object... parameters) {
        Class<?>[] classes = new Class<?>[parameters.length];
        for (int i = 0; i < parameters.length; i++) {
            Class<?> clazz = parameters[i].getClass();
            if (clazz == Boolean.class) {
                clazz = boolean.class;
            } else if (clazz == Byte.class) {
                clazz = byte.class;
            } else if (clazz == Character.class) {
                clazz = char.class;
            } else if (clazz == Double.class) {
                clazz = double.class;
            } else if (clazz == Float.class) {
                clazz = float.class;
            } else if (clazz == Integer.class) {
                clazz = int.class;
            } else if (clazz == Long.class) {
                clazz = long.class;
            } else if (clazz == Short.class) {
                clazz = short.class;
            } else if (clazz == Void.class) {
                clazz = void.class;
            }
            classes[i] = clazz;
        }
        return classes;
    }

    private static Class<?> getClass(String clazz) {
        try {
            return Class.forName(clazz);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }
}

Related

1. invoke(Constructor constructor)
2. invoke(Constructor constructor, Object... args)
3. invoke(Constructor constructor, Object... args)
4. invokeConstructor(Class clazz, Class[] paramTypes, Object[] params)
5. invokeConstructor(Class objectClass, Class[] classes, Object... params)
6. invokeConstructor(Class clazz, Class[] argTypes, Object[] args)
7. invokeConstructor(Class cls)
8. invokeConstructor(Class type, Object value)