Has Declared Constructor : Constructor « Reflection « Java Tutorial

import java.lang.reflect.Constructor;

public class ReflectionUtils {

  public static boolean hasDeclaredConstructor(Class targetClass, Class[] partypes) {
    Constructor constructor = null;
    try {
      constructor = targetClass.getConstructor(partypes);
    }catch (Exception e) {
    return constructor != null;

7.3.1.Get all constructors or by parameters
7.3.2.Demonstrates use of Constructor objects
7.3.3.A program that displays a class synopsis for the named class
7.3.4.Create new instance from Constructor
7.3.5.Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED
7.3.6.Load class with Class.forName
7.3.7.Call Private constructor
7.3.8.Get constructor by parameter type
7.3.9.Invoke a constructor which throws Exception
7.3.10.Passing a parameter to the constructor and calling a method dynamically
7.3.11.Getting a Constructor of a Class Object: By obtaining a list of all Constructors object
7.3.12.Getting a Constructor of a Class Object: By obtaining a particular Constructor object.
7.3.13.Get a compatible constructor for the given value type
7.3.14.Has Declared Constructor