Constructor.getParameterTypes() has the following syntax.
public Class <?>[] getParameterTypes()
In the following code shows how to use Constructor.getParameterTypes() method.
import java.lang.reflect.Constructor; import java.lang.reflect.Modifier; //from ww w. j a v a 2 s. c o m public class Main { public static void main(String[] argv) throws Exception { Constructor[] constructors = String.class.getDeclaredConstructors(); for (int i = 0; i < constructors.length; i++) { Constructor c = constructors[i]; Class[] paramTypes = c.getParameterTypes(); String name = c.getName(); System.out.print(Modifier.toString(c.getModifiers())); System.out.print(" " + name + "("); for (int j = 0; j < paramTypes.length; j++) { if (j > 0) System.out.print(", "); System.out.print(paramTypes[j].getCanonicalName()); } System.out.println(");"); } } }
The output: