Java™ Phrasebook

Discovering Class Constructors

Class c = someObject.getClass(); Constructor[] constructors = c.getConstructors(); for (int i = 0; i < constructors.length; i++) { Class[] paramTypes = constructors[i].getParameterTypes(); for (int k = 0; k < paramTypes.length; k ++) { String paramTypeStr = paramTypes[k].getName(); System.out.print(paramTypeStr + " "); } System.out.println(); }

You can get information about a class’s public constructors by calling the getConstructors() method on a Class object. This method returns an array of Constructor objects. Using the Constructor object, you can then get the constructor’s name, modifiers, parameter types, and throwable exceptions. The Constructor object also has a newInstance() method that allows you to create ...