import java.util.*;
import java.lang.reflect.*;
public class ReflectionTest
{
public static void main(String[] args)
{
String name;
if(args.length > 0)
name = args[0];
else
{
Scanner in = new Scanner(System.in);
System.out.println("Enter class name (e.g. java.util.Date): ");
name = in.next();
}
try
{
Class cl = Class.forName(name);
Class supercl = cl.getSuperclass();
System.out.print("class " + name);
if(supercl != null && supercl != Object.class)
System.out.print(" extends " + supercl.getName());
System.out.print("\n{\n");
printConstructors(cl);
System.out.println();
printMethods(cl);
System.out.println();
printFields(cl);
System.out.println("}");
}
catch(ClassNotFoundException e){ e.printStackTrace();}
System.exit(0);
}
public static void printConstructors(Class cl)
{
Constructor[] constructors = cl.getDeclaredConstructors();
for(Constructor c : constructors)
{
String name = c.getName();
System.out.print(" " + Modifier.toString(c.getModifiers()));
System.out.print(" " + name + "(");
Class[] paramTypes = c.getParameterTypes();
for(int j = 0;j < paramTypes.length;j++)
{
if(j > 0) System.out.print(", ");
System.out.print(paramTypes[j].getName());
}
System.out.println(");");
}
}
public static void printMethods(Class cl)
{
Method[] methods = cl.getDeclaredMethods();
for(Method m : methods)
{
Class retType = m.getReturnType();
String name = m.getName();
System.out.print(" " + Modifier.toString(m.getModifiers()));
System.out.print(" " + retType.getName() + " " + name + "(");
Class[] paramTypes = m.getParameterTypes();
for(int j = 0;j < paramTypes.length;j++)
{
if(j > 0) System.out.print(", ");
System.out.print(paramTypes[j].getName());
}
System.out.println(");");
}
}
public static void printFields(Class cl)
{
Field[] fields = cl.getDeclaredFields();
for(Field f : fields)
{
Class type = f.getType();
String name = f.getName();
System.out.print(" " + Modifier.toString(f.getModifiers()));
System.out.println(" " + type.getName() + " " + name + ";");
}
}
}