Java Random primitive generation (basic Api only)

JavaRandom

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.Random;
import java.util.UUID;
import java.util.concurrent.ThreadLocalRandom;
import java.time.Instant;

class JavaRandom {

    public static void main(String[] args) {
        // uuid
        final UUID uuid = UUID.randomUUID();
        final long timestamp = UUID.randomUUID().timestamp();
        final String s = UUID.randomUUID().toString();

        // pseudo random using time
        final Long datemilliseconds = System.currentTimeMillis();
        final long datenanoseconds = System.nanoTime();
        final LocalDateTime now = LocalDateTime.now();
        final LocalDate localDate = LocalDate.now();
        final Long instantMs = Instant.now().toEpochMilli();
        
        // Math
        final double d = Math.random();

        // Random (many more options to get random values as stream random.doubles().
        final Random random = new Random();
        final int ri = random.nextInt();
        final double rd = random.nextDouble();
        final long r1 = random.nextLong();
        final boolean rb = random.nextBoolean();
        final float rf = random.nextFloat();


        // ThreadLocalRandom extends Random (same options)
        final Long l = ThreadLocalRandom.current().nextLong();

        // random generation with simple tweak + API call
        short rs = (short)random.nextInt(Short.MAX_VALUE + 1);

        byte[] array = new byte[7]; random.nextBytes(array);

        // using commons apache
        
        //random String
        int maxSize = new Random().nextInt();
        final String value = RandomStringUtils.random(maxSize);

    }
}