Reminder classloader, classname :

Exit0.class.getSimpleName() = Exit0
Exit0.class.getCanonicalName() = com.gorki.Exit0
<instance>.getClass().getSimpleName() = 
<instance>.getClass().getCanonicalName() = null
<instance>.getClass().getName() = com.gorki.Exit0$1
<instance>.getClass().getTypeName() = com.gorki.Exit0$1
<instance>.getClass().getPackage().getName() = com.gorki
<instance>.getClass().isAnonymousClass() = true

With :

package com.gorki;

import java.util.ArrayList;
import java.util.Random;

public class Exit0 {

    public static void main(String... args) {

        Runnable t = new Runnable() {
            @Override
            public void run() {
            }
        };

        System.out.println("Exit0.class.getSimpleName() = " + Exit0.class.getSimpleName());
        System.out.println("Exit0.class.getCanonicalName() = " + Exit0.class.getCanonicalName());
        System.out.println("<instance>.getClass().getSimpleName() = " + t.getClass().getSimpleName());
        System.out.println("<instance>.getClass().getCanonicalName() = " + t.getClass().getCanonicalName());
        System.out.println("<instance>.getClass().getName() = " + t.getClass().getName());
        System.out.println("<instance>.getClass().getTypeName() = " + t.getClass().getTypeName());
        System.out.println("<instance>.getClass().getPackage().getName() = " + t.getClass().getPackage().getName());
        System.out.println("<instance>.getClass().isAnonymousClass() = " + t.getClass().isAnonymousClass());
    }
}