ReflectionTest.java

/**
   @version 1.1 2004-02-21
   @author Cay Horstmann
*/

import java.util.*;
import java.lang.reflect.*;

class ReflectionTest{
	
	public static void main(String args[]){
		
		String name;
		
		if(args.length > 0) name = args[0]; else name = "";
		
		try{
			Class cl = Class.forName(name);
			Class supcl = cl.getSuperclass();
			System.out.println("Class: " + name);
			if (supcl != null && supcl != Object.class){ System.out.println(" extends " + supcl.getName()); }
			printConstructors(cl);
			System.out.println();
			printMethods(cl);
			System.out.println();
			printFields(cl);
			System.out.println();
			}
		catch(ClassNotFoundException e){
			//e.PrintStackTrace();
			}
		System.exit(0);
		
		}
	
	/**
		Âûâîä ñèãíàòóð âñåõ êîíñòðóêòîðîâ êëàññà
		@param cl êëàññ
	*/
	
	public static void printConstructors(Class cl){
		Constructor[] constr = cl.getDeclaredConstructors();
		
		for (Constructor c : constr){
			String name = c.getName();
			System.out.print("   " + Modifier.toString(c.getModifiers()));
			System.out.print(" " + name + "(");

			// print parameter types
			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(");");
			}
		
		}
	
//----------------------------------------------------
	   /**
      Prints all methods of a class
      @param cl a class
    */
   public static void printMethods(Class cl)
   {  
      Method[] methods = cl.getDeclaredMethods();

      for (Method m : methods)
      {  
         Class retType = m.getReturnType();
         String name = m.getName();

         // print modifiers, return type and method name
         System.out.print("   " + Modifier.toString(m.getModifiers()));
         System.out.print(" " + retType.getName() + " " + name + "(");

         // print parameter types
         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(");");
      }
   }

   /**
      Prints all fields of a class
      @param cl a class
    */
   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 + ";");
      }
   }
//----------------------------------------------------	
	}