ReflectionTest.java Source code

Introduction

Here is the source code for ReflectionTest.java

Source

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

public class ReflectionTest {
    public static void main(String[] args) {
        String name = "java.util.Date";
        try {
            Class cl = Class.forName(name);
            Class supercl = cl.getSuperclass();
            System.out.print("class " + name);
            if (supercl != null && !supercl.equals(Object.class))
                System.out.println(" extends " + supercl.getName());
            System.out.print("Its constructors:");
            printConstructors(cl);
            System.out.println();
        } catch (ClassNotFoundException e) {
            System.out.println("Class not found.");
        }
    }

    public static void printConstructors(Class cl) {
        Constructor[] constructors = cl.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].getName());
            }
            System.out.println(");");
        }
    }
}