{"id":1534,"date":"2022-04-05T16:13:16","date_gmt":"2022-04-05T04:13:16","guid":{"rendered":"https:\/\/www.ronella.xyz\/?p=1534"},"modified":"2022-04-05T16:13:16","modified_gmt":"2022-04-05T04:13:16","slug":"generating-random-number","status":"publish","type":"post","link":"https:\/\/www.ronella.xyz\/?p=1534","title":{"rendered":"Generating Random Number"},"content":{"rendered":"

Listing the Available Random Algorithms<\/h2>\n
System.out.printf("%-13s| %s\\n-------------|---------------------\\n", "Group", "Name");\njava.util.random.RandomGeneratorFactory.all()\n        .sorted(java.util.Comparator.comparing(java.util.random.RandomGeneratorFactory::name))\n        .forEach(factory -> System.out.printf("%-13s| %s\\n", factory.group(), factory.name()));<\/code><\/pre>\n
The output is similar to the following:<\/p>\n
Group        | Name\n-------------|---------------------\nLXM          | L128X1024MixRandom\nLXM          | L128X128MixRandom\nLXM          | L128X256MixRandom\nLXM          | L32X64MixRandom\nLXM          | L64X1024MixRandom\nLXM          | L64X128MixRandom\nLXM          | L64X128StarStarRandom\nLXM          | L64X256MixRandom\nLegacy       | Random\nLegacy       | SecureRandom\nLegacy       | SplittableRandom\nXoroshiro    | Xoroshiro128PlusPlus\nXoshiro      | Xoshiro256PlusPlus<\/code><\/pre>\n
\n
Check from the following address on how to choose which algorithm to choose:<\/p>\n
https:\/\/docs.oracle.com\/en\/java\/javase\/17\/docs\/api\/java.base\/java\/util\/random\/package-summary.html#algorithms<\/a><\/p>\n<\/blockquote>\n
Creating an instance of RandomGenerator<\/h3>\n
The default algorithm (i.e. L32X64MixRandom)<\/em><\/h4>\n
var generator = java.util.random.RandomGenerator.getDefault();<\/code><\/pre>\n
The specific algorithm (e.g. L64X128MixRandom)<\/h4>\n
var generator = java.util.random.RandomGenerator.of("L64X128MixRandom");<\/code><\/pre>\n
\n
Use the static method RandomGenerator.of<\/strong> and pass the name of the algorithm<\/strong>.<\/p>\n<\/blockquote>\n
Generating Random Number<\/h2>\n
Use one of the following instance methods of the RandomGenerator class<\/strong>:<\/p>\n
    \n
  • nextDouble()<\/li>\n
  • nextDouble(double bound)<\/li>\n
  • nextDouble(double origin, double bound)<\/li>\n
  • nextFloat()<\/li>\n
  • nextFloat(float bound)<\/li>\n
  • nextFloat(float origin, float bound)<\/li>\n
  • nextInt()<\/li>\n
  • nextInt(int bound)<\/li>\n
  • nextInt(int origin, int bound)<\/li>\n
  • nextLong()<\/li>\n
  • nextLong(long bound)<\/li>\n
  • nextLong(long origin, long bound)<\/li>\n<\/ul>\n
    The origin parameter is inclusive<\/strong> and bound parameter is exclusive<\/strong>.<\/p>\n
    Example using a classic random algorithm<\/strong><\/p>\n
     var generator = java.util.random.RandomGenerator.of("Random");\n System.out.println(generator.nextInt());<\/code><\/pre>\n
    \n
    The output is a random integer number.<\/p>\n<\/blockquote>\n
    Generating Random Number Using Streams<\/h2>\n
    Use one of the following instance methods of RandomGenerators class to create streams<\/strong>:<\/p>\n
      \n
    • doubles()<\/li>\n
    • doubles(double origin, double bound)<\/li>\n
    • doubles(long streamSize)<\/li>\n
    • doubles(long streamSize, double origin, double bound)<\/li>\n
    • ints()<\/li>\n
    • ints(int origin, int bound)<\/li>\n
    • ints(long streamSize)<\/li>\n
    • ints(long streamSize, int origin, int bound)<\/li>\n
    • longs()<\/li>\n
    • longs(long origin, long bound)<\/li>\n
    • longs(long streamSize)<\/li>\n
    • longs(long streamSize, long origin, long bound)<\/li>\n<\/ul>\n
      The origin parameter is inclusive<\/strong> and bound parameter is exclusive<\/strong>.<\/p>\n
      Example using a classic random algorithm<\/strong><\/p>\n
      var generator = java.util.random.RandomGenerator.of("Random");\nvar randomInt = generator.ints(100, 1, 100)\n        .filter(number -> number % 2 == 0 )\n        .findFirst();\nrandomInt.ifPresent(System.out::println);<\/code><\/pre>\n
      \n
      The output is a random integer number.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
      Listing the Available Random Algorithms System.out.printf("%-13s| %s\\n————-|———————\\n", "Group", "Name"); java.util.random.RandomGeneratorFactory.all() .sorted(java.util.Comparator.comparing(java.util.random.RandomGeneratorFactory::name)) .forEach(factory -> System.out.printf("%-13s| %s\\n", factory.group(), factory.name())); The output is similar to the following: Group | Name ————-|——————— LXM | L128X1024MixRandom LXM | L128X128MixRandom LXM | L128X256MixRandom LXM | L32X64MixRandom LXM | L64X1024MixRandom LXM | L64X128MixRandom LXM | L64X128StarStarRandom LXM | L64X256MixRandom Legacy | Random […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[74],"tags":[],"_links":{"self":[{"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=\/wp\/v2\/posts\/1534"}],"collection":[{"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1534"}],"version-history":[{"count":1,"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=\/wp\/v2\/posts\/1534\/revisions"}],"predecessor-version":[{"id":1535,"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=\/wp\/v2\/posts\/1534\/revisions\/1535"}],"wp:attachment":[{"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ronella.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}