BlueBreeze

package com.leo.test;

import java.lang.reflect.*;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Leo
 */
public class test 
{

    /**
     *
     * @param args input class name
     */
    public static void main(String[] args) 
    {
        String name;
        if (args.length > 0)
        {
            name = args[0];
        }
        else
        {
            Scanner s = new Scanner(System.in);
            System.out.println("Please input a class name (eg. java.util.Date)");
            name = s.next();
        }
        
        try 
        {
            Class cl = Class.forName(name);
            Class superCl = cl.getSuperclass();
            String modifiers = Modifier.toString(cl.getModifiers());
            if (modifiers.length() > 0) System.out.print(modifiers + " ");
            System.out.print("class " + name + " ");
            if (superCl != null && superCl != Object.class)
                System.out.print("extends " + superCl.getName());
            System.out.print("\n{\n");
            printFields(cl);
            System.out.println();
            printConstructors(cl);
            System.out.println();
            printMethods(cl);
            System.out.println("}");
        } 
        catch (ClassNotFoundException ex) 
        {
            Logger.getLogger(test.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    
    /**
     *
     * @param cl class name
     */
    public static void printFields(Class cl)
    {
        Field[] fields;
        fields = cl.getDeclaredFields();
        
        for (Field f : fields)
        {
            Class type = f.getType();
            String name = f.getName();
            System.out.print("  ");
            String modifiers = Modifier.toString(f.getModifiers());
            if (modifiers.length() > 0) System.out.print(modifiers + " ");
            System.out.print(type.getName() + " ");
            System.out.println(name);
        }
    }
    
    public static void printConstructors(Class cl)
    {
        Constructor[] cons;
        cons = cl.getDeclaredConstructors();
        
        for (Constructor c : cons)
        {
            System.out.print("  ");
            String modifiers = Modifier.toString(c.getModifiers());
            if (modifiers.length() > 0) System.out.print(modifiers + " ");
            System.out.print(c.getName() + " (");
            
            Class[] params = c.getParameterTypes();
            for (int i = 0; i < params.length; i++)
            {
                if (i > 0) System.out.print(", ");
                System.out.print(params[i].getName());
            }
            System.out.println(")");
        }
    }
    
    public static void printMethods(Class cl)
    {
        Method[] methods;
        methods = cl.getDeclaredMethods();
        
        for (Method m : methods)
        {
            System.out.print("  ");
            String modifiers = Modifier.toString(m.getModifiers());
            if (modifiers.length() > 0) System.out.print(modifiers + " ");
            Class ret = m.getReturnType();
            System.out.print(ret.getName() + " ");
            System.out.print(m.getName() + " (");
            
            Class[] params = m.getParameterTypes();
            for (int i = 0; i < params.length; i++)
            {
                if (i > 0) System.out.print(", ");
                System.out.print(params[i].getName());
            }
            System.out.println(")");
        }
    }
}