Java Reflection Constructor Get getConstructor(Class clazz, Class... parameterTypes)

Description

Returns a public constructor of the given class with the given parameter types.

License

Apache License

Parameter

Parameter	Description
clazz	the class
parameterTypes	expected types of parameters

Return

the matching public constructor or null, if there is no matching constructor.

Declaration

public static <T> Constructor<T> getConstructor(Class<T> clazz, Class<?>... parameterTypes) 

Method Source Code

//package com.java2s;
/*//from   w w  w  .  j a  v a 2 s. c  o m
 * Copyright 2016 Sai Pullabhotla.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.lang.reflect.Constructor;

public class Main {
    /**
     * Returns a public constructor of the given class with the given parameter
     * types. Returns <code>null</code>, if there is no matching constructor.
     * 
     * @param clazz
     *            the class
     * @param parameterTypes
     *            expected types of parameters
     * @return the matching public constructor or <code>null</code>, if there is
     *         no matching constructor.
     */
    public static <T> Constructor<T> getConstructor(Class<T> clazz, Class<?>... parameterTypes) {
        try {
            if (parameterTypes != null && parameterTypes.length > 0) {
                return clazz.getConstructor(parameterTypes);
            } else {
                return clazz.getConstructor();
            }
        } catch (Exception exp) {
            return null;
        }
    }
}

Related

1. getConstructor(Class type, Object[] args)
2. getConstructor(Class type, Class[] givenTypes)
3. getConstructor(Class aClass)
4. getConstructor(Class cl, Class... params)
5. getConstructor(Class clazz)
6. getConstructor(Class clazz, Class[] expectedTypes)
7. getConstructor(Class cls, Class... parameterClses)
8. getConstructor(Class cls, Class[] args)
9. getConstructor(Class cls, Object... args)