Java - 4 different ways to generate random double

public static double nextDouble() {

    return ThreadLocalRandom.current().nextDouble();

}

System.out.println(nextDouble()); // 0.6260248581412109

System.out.println(nextDouble()); // 0.8624217725537807

System.out.println(nextDouble()); // 0.4870344165107542

public static double nextDouble2() {

    return new Random().nextDouble();

}

System.out.println(nextDouble2()); // 0.8853243052768429

System.out.println(nextDouble2()); // 0.763297548370907

System.out.println(nextDouble2()); // 0.8125479078816122

public static double nextDouble3() {

    return Math.random();

}

System.out.println(nextDouble3()); // 0.36225288271248024

System.out.println(nextDouble3()); // 0.03675822890573344

System.out.println(nextDouble3()); // 0.48065002903809895

public static double nextDouble4() {

    // java 8 + DoubleStream

    return new Random().doubles().limit(1).findFirst().getAsDouble();

}

System.out.println(nextDouble4()); // 0.9310238127103216

System.out.println(nextDouble4()); // 0.7304200864872137

System.out.println(nextDouble4()); // 0.9112523320636519