Java tutorial
import java.lang.reflect.Constructor; public class Main { public static void main(String[] args) { MyClass cls = new MyClass(); Class c = cls.getClass(); // constructors Constructor[] ct = c.getDeclaredConstructors(); for (int i = 0; i < ct.length; i++) { System.out.println("Constructor found: " + ct[i].toString()); } } } class MyClass { public MyClass() { System.out.println("no argument constructor"); } public MyClass(Double d, Long l) { this.d = d; this.l = l; } Double d = new Double(3.9d); Long l = new Long(123); }