Continuing my series on advanced classes that are handy to have around when needed. I have created the UnitOfTime. This class is used to convert a number of milliseconds over to a more understandable period of time.<\/p>\n\n\n
package name.mymiller.extensions.lang;\n\nimport java.math.BigDecimal;\nimport java.math.BigInteger;\n\n\/**\n * Measure UnitOfTime based on milliseconds\n *\n * @author jmiller\n *\/\npublic enum UnitOfTime {\n \/\/@formatter:off\n \/**\n * Millieseconds\n *\/\n Millisecond(\"ms\", new BigInteger(\"1\")),\n \/**\n * Seconds\n *\/\n Second(\"secs\", new BigInteger(\"1000\")),\n \/**\n * Minutes\n *\/\n Minute(\"mins\", new BigInteger(\"60000\")),\n \/**\n * Hours\n *\/\n Hour(\"hours\", new BigInteger(\"3600000\")),\n \/**\n * Days\n *\/\n Day(\"days\", new BigInteger(\"86400000\")),\n \/**\n * Weeks\n *\/\n Week(\"weeks\", new BigInteger(\"604800000\")),\n \/**\n * Years\n *\/\n Year(\"years\", new BigInteger(\"31536000000\")),\n \/**\n * Millennium\n *\/\n Millennium(\"millennium\", new BigInteger(\"31536000000000\"));\n\n \/\/@formatter:on\n\n \/**\n * Label to use on this UnitOfTime\n *\/\n private String label = null;\n \/**\n * Total Millieseonds\n *\/\n private BigInteger milliseconds = null;\n\n \/**\n * Constructor for this UnitOfTime\n *\n * @param label Label to use\n * @param milliseconds Number of milliseconds to make this unit of time.\n *\/\n UnitOfTime(String label, BigInteger milliseconds) {\n this.label = label;\n this.milliseconds = milliseconds;\n }\n\n \/**\n * Convert a number of milliseconds into a Years Days Hours Minutes Seconds\n * Milliseconds format\n *\n * @param milliseconds Number of milliseconds to convert\n * @return String containing the conversion\n *\/\n public static String convert(BigInteger milliseconds) {\n BigInteger working = milliseconds;\n final StringBuilder builder = new StringBuilder();\n\n final BigInteger years = UnitOfTime.Year.getMilliseconds().divide(working);\n working = working.subtract(years.multiply(UnitOfTime.Year.getMilliseconds()));\n\n final BigInteger days = UnitOfTime.Day.getMilliseconds().divide(working);\n working = working.subtract(days.multiply(UnitOfTime.Day.getMilliseconds()));\n\n final BigInteger hours = UnitOfTime.Hour.getMilliseconds().divide(working);\n working = working.subtract(hours.multiply(UnitOfTime.Hour.getMilliseconds()));\n\n final BigInteger minutes = UnitOfTime.Minute.getMilliseconds().divide(working);\n working = working.subtract(minutes.multiply(UnitOfTime.Minute.getMilliseconds()));\n\n final BigInteger seconds = UnitOfTime.Second.getMilliseconds().divide(working);\n working = working.subtract(seconds.multiply(UnitOfTime.Second.getMilliseconds()));\n\n if (years.longValue() != 0L) {\n builder.append(years);\n builder.append(\" years \");\n }\n if (days.longValue() != 0L) {\n builder.append(days);\n builder.append(\" days \");\n }\n if (hours.longValue() != 0L) {\n builder.append(hours);\n builder.append(\" hours \");\n }\n if (minutes.longValue() != 0L) {\n builder.append(minutes);\n builder.append(\" minutes \");\n }\n if (seconds.longValue() != 0L) {\n builder.append(seconds);\n builder.append(\" seconds \");\n }\n if (working.longValue() != 0L) {\n builder.append(working);\n builder.append(\" milliseconds \");\n }\n\n return builder.toString();\n }\n\n \/**\n * Determine what unit to use based on the number of milliseconds\n *\n * @param milliseconds Total number of milliseconds\n * @return UnitOfTime you should use.\n *\/\n public static UnitOfTime useUnit(BigInteger milliseconds) {\n if (milliseconds.compareTo(UnitOfTime.Millennium.getMilliseconds()) >= 0) {\n return UnitOfTime.Millennium;\n } else if (milliseconds.compareTo(UnitOfTime.Year.getMilliseconds()) >= 0) {\n return UnitOfTime.Year;\n } else if (milliseconds.compareTo(UnitOfTime.Week.getMilliseconds()) >= 0) {\n return UnitOfTime.Week;\n } else if (milliseconds.compareTo(UnitOfTime.Day.getMilliseconds()) >= 0) {\n return UnitOfTime.Day;\n } else if (milliseconds.compareTo(UnitOfTime.Hour.getMilliseconds()) >= 0) {\n return UnitOfTime.Hour;\n } else if (milliseconds.compareTo(UnitOfTime.Minute.getMilliseconds()) >= 0) {\n return UnitOfTime.Minute;\n } else if (milliseconds.compareTo(UnitOfTime.Second.getMilliseconds()) >= 0) {\n return UnitOfTime.Second;\n } else {\n return UnitOfTime.Millisecond;\n }\n }\n\n \/**\n * Determine what unit to use based on the number of milliseconds\n *\n * @param milliseconds Total number of milliseconds\n * @return UnitOfTime you should use.\n *\/\n public static UnitOfTime useUnit(Integer milliseconds) {\n return UnitOfTime.useUnit(BigInteger.valueOf(milliseconds));\n }\n\n \/**\n * Determine what unit to use based on the number of milliseconds\n *\n * @param milliseconds Total number of milliseconds\n * @return UnitOfTime you should use.\n *\/\n public static UnitOfTime useUnit(Long milliseconds) {\n return UnitOfTime.useUnit(BigInteger.valueOf(milliseconds));\n }\n\n \/**\n * @return the label\n *\/\n public final String getLabel() {\n return this.label;\n }\n\n \/**\n * @return the milliseconds\n *\/\n public final BigInteger getMilliseconds() {\n return this.milliseconds;\n }\n\n \/**\n * Convert to the UnitOfTime\n *\n * @param milliseconds Milliseconds to convert\n * @return BigDecimal of the number of units\n *\/\n public BigDecimal getUnits(BigInteger milliseconds) {\n return new BigDecimal(milliseconds.divide(this.getMilliseconds()));\n }\n\n \/**\n * Convert to the UnitOfTime\n *\n * @param milliseconds Milliseconds to convert\n * @return BigDecimal of the number of units\n *\/\n public BigDecimal getUnits(Integer milliseconds) {\n return this.getUnits(BigInteger.valueOf(milliseconds));\n }\n\n \/**\n * Convert to the UnitOfTime\n *\n * @param milliseconds Milliseconds to convert\n * @return BigDecimal of the number of units\n *\/\n public BigDecimal getUnits(Long milliseconds) {\n return this.getUnits(BigInteger.valueOf(milliseconds));\n }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"Continuing my series on advanced classes that are handy to have around when needed. I have created the UnitOfTime. This class is used to convert a number of milliseconds over to a more understandable period of time.<\/p>\n","protected":false},"author":1,"featured_media":2342,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[457],"tags":[69],"series":[248],"class_list":["post-2111","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java_extra","tag-java-2","series-advanced-classes"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2017\/03\/time-3222267_640.jpg?fit=640%2C426&ssl=1","jetpack-related-posts":[{"id":2067,"url":"https:\/\/www.mymiller.name\/wordpress\/java_extra\/unitofmemory\/","url_meta":{"origin":2111,"position":0},"title":"UnitOfMemory – Measure and convert you bytes","author":"Jeffery Miller","date":"November 24, 2025","format":false,"excerpt":"Not very often do I need to take a number of bytes and convert them into the most appropriate measurement. \u00a0This came up recently on a project and I thought it would be nice to just create a class to handle this for me. \u00a0So I created UnitOfMemory as enum\u2026","rel":"","context":"In "Java Extras"","block_context":{"text":"Java Extras","link":"https:\/\/www.mymiller.name\/wordpress\/category\/java_extra\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2017\/02\/info-1641937_640.jpg?fit=640%2C426&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2017\/02\/info-1641937_640.jpg?fit=640%2C426&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2017\/02\/info-1641937_640.jpg?fit=640%2C426&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":3249,"url":"https:\/\/www.mymiller.name\/wordpress\/java_tips\/java-tips-part-5\/","url_meta":{"origin":2111,"position":1},"title":"Java Tips Part 5","author":"Jeffery Miller","date":"December 24, 2025","format":false,"excerpt":"Tip 21: Use Prepared Statements When working with JPA\/Hibernate make use of Prepared Statements that can be reused. Basically, I'm saying do not do the following: Query query = JPA.em().createNativeQuery(\"select count(*) from user u inner join\" + \"address a where a.user_id=u.id and a.city='\" + city + \"'\"); BigInteger val =\u2026","rel":"","context":"In "Java Tips"","block_context":{"text":"Java Tips","link":"https:\/\/www.mymiller.name\/wordpress\/category\/java_tips\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2021\/12\/sam-dan-truong-rF4kuvgHhU-unsplash-scaled-e1640791434235.jpg?fit=640%2C427&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2021\/12\/sam-dan-truong-rF4kuvgHhU-unsplash-scaled-e1640791434235.jpg?fit=640%2C427&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2021\/12\/sam-dan-truong-rF4kuvgHhU-unsplash-scaled-e1640791434235.jpg?fit=640%2C427&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":2072,"url":"https:\/\/www.mymiller.name\/wordpress\/java_extra\/unitofdistance\/","url_meta":{"origin":2111,"position":2},"title":"UnitOfDistance – Measure and Convert your distance","author":"Jeffery Miller","date":"November 24, 2025","format":false,"excerpt":"Well I was bored one night after creating the UnitOfMemory and decided what else could be useful in the future. \u00a0I came up with a UnitOfDistance to convert distances over land. \u00a0Miles v's kilometers and everything in between. \u00a0The class was easy to come up with, finding the exact conversion\u2026","rel":"","context":"In "Java Extras"","block_context":{"text":"Java Extras","link":"https:\/\/www.mymiller.name\/wordpress\/category\/java_extra\/"},"img":{"alt_text":"UnitOfDistance","src":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2017\/02\/tape-measure-1860811_640.jpg?fit=640%2C426&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2017\/02\/tape-measure-1860811_640.jpg?fit=640%2C426&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2017\/02\/tape-measure-1860811_640.jpg?fit=640%2C426&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":3380,"url":"https:\/\/www.mymiller.name\/wordpress\/java\/synchronous-to-asynchronous\/","url_meta":{"origin":2111,"position":3},"title":"Synchronous to Asynchronous","author":"Jeffery Miller","date":"December 24, 2025","format":false,"excerpt":"Converting a synchronous method to an asynchronous one in Java involves modifying the code to allow other tasks to execute while it is waiting for input\/output operations to complete. Here's an example of how to convert a synchronous method to an asynchronous one in Java: Let's say we have a\u2026","rel":"","context":"In "JAVA"","block_context":{"text":"JAVA","link":"https:\/\/www.mymiller.name\/wordpress\/category\/java\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2023\/06\/multitasking-ga6749a2b2_640.jpg?fit=640%2C394&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2023\/06\/multitasking-ga6749a2b2_640.jpg?fit=640%2C394&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2023\/06\/multitasking-ga6749a2b2_640.jpg?fit=640%2C394&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":3153,"url":"https:\/\/www.mymiller.name\/wordpress\/architecture\/performance-nanoseconds-now-not-milliseconds\/","url_meta":{"origin":2111,"position":4},"title":"Performance? nanoseconds, not milliseconds!","author":"Jeffery Miller","date":"March 12, 2022","format":false,"excerpt":"In today's time of high-performance computing, we no longer have the luxury of measuring our time in milliseconds, we need to move past this into nanoseconds. When I first started programming in the '90s we measured our code in seconds. That quickly gave way to milliseconds, even before the '90s\u2026","rel":"","context":"In "Architecture"","block_context":{"text":"Architecture","link":"https:\/\/www.mymiller.name\/wordpress\/category\/architecture\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2022\/01\/superhero-g470982bed_640.jpg?fit=640%2C418&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2022\/01\/superhero-g470982bed_640.jpg?fit=640%2C418&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.mymiller.name\/wordpress\/wp-content\/uploads\/2022\/01\/superhero-g470982bed_640.jpg?fit=640%2C418&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":3179,"url":"https:\/\/www.mymiller.name\/wordpress\/java_extra\/understanding-json-data-processing-with-java-exploring-the-jsonfieldprocessor-class\/","url_meta":{"origin":2111,"position":5},"title":"Understanding JSON Data Processing with Java: Exploring the JsonFieldProcessor Class","author":"Jeffery Miller","date":"January 15, 2026","format":false,"excerpt":"In today's digital era, data comes in various formats, with JSON (JavaScript Object Notation) being one of the most popular for representing structured data. Manipulating and processing JSON data efficiently is crucial for many software applications, from web development to data analysis. 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