Java Object Info, Java

Java Object Info

//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

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

class Rextester
{  
    public static final String NL = System.lineSeparator();
    public static void main(String args[]) throws Exception
    {
        StringBuilder sb = new StringBuilder();
        Class<?> c = Class.forName(new Scanner(System.in).nextLine());
        String name = c.getName();
        sb.append("**");
        for(int i = 0; i < name.length(); i++) sb.append("*");
        String sep = sb.append("**").append(NL).toString();
        sb.append("* ").append(name).append(" *")
        .append(NL).append(sep);
        sb.append("* Superclasses:").append(NL);
        for(Class<?> cl = c.getSuperclass(); cl != null; cl = cl.getSuperclass()) sb.append("* ").append(cl.getName()).append(NL);
        sb.append(sep).append("* Fields:").append(NL);
        for(Class<?> cl = c; cl != Object.class; cl = cl.getSuperclass())
            for(Field f : cl.getDeclaredFields()) {
                String mod = Modifier.toString(f.getModifiers());
                if(mod.isEmpty()) mod = "package private";
                sb.append("* ").append(mod).append(" ").append(f.getType().getSimpleName()).append(" ").append(f.getName()).append(NL);
            }
        sb.append(sep).append("* Methods:").append(NL);
        for(Class<?> cl = c; cl != null; cl = cl.getSuperclass()){
            for(Method m : cl.getDeclaredMethods()){
                StringJoiner sjs = new StringJoiner(" ");
                String mod = Modifier.toString(m.getModifiers());
                if(mod.isEmpty()) mod = "package private";
                sjs.add("*").add(mod).add(m.getReturnType().getSimpleName()).add(m.getName());
                sb.append(sjs.toString());
                StringJoiner sj = new StringJoiner(", ", "(", ")");
                for(Class<?> par : m.getParameterTypes()){
                    sj.add(par.getSimpleName());
                }
                sb.append(sj.toString()).append(NL);
            }
        }

System.out.println(sb);
    }
}


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