In Java Util Tutorial you will learn how to effectively use utility classes from Java API to be even more productive!
Java Util Base64
- Java Base64
Shows how to encode and decode messages using new in Java 8 Base64 class. - Java Base64 MIME
Shows how to encode and decode MIME messages using new in Java 8 Base64 class. - Java Base64 URL
URL and Filname safe encoding using new in Java 8 Base64 class.
Java Util Calendar
- Java Calendar
Shows how to properly create Calendar instances also with Java 8 builder.
Java Util Console
- Java Console read password
Find out how to read password from Java Console in a secure way!
Java Util Currency
- Java Util Currency
How to work with currencies in Java.
Java Util Formattable
- Java Formattable example
Shows how to print Java objects using custom format.
Java Util List
- Java List types and their methods
Learn this fundamental data structure!
Java Util Locale
- Java Locale create in different ways
How to create Locale using builder, constructor, and factory method. - Java Locale information
How to display various information about Locale.
Java Util Optional
- Java Util Optional.ofNullable(T)
How to handle with Optional potentially nullable values. - Java Util Optional map(Function)
How to convert value conditionally using Optional.
Java Util Map
- Java Util Map.compute(Key, BiFunction)
How to compute a new value for the key using given BiFunction (new in Java 8). - Java Util Map computeIfAbsent(key,Function)
How to compute a new value only when there wasn’t any (new in Java 8). - Java Util Map computeIfPresent(Key,BiFunction)
How to compute a new value only when there was one before (new in Java 8). - Java Util Map forEach(BiConsumer)
How to perform given action for each entry of the map (new in Java 8). - Java Util Map getOrDefault
How to return mapped value or default if not found (new in Java 8). - Java Util Map merge(key, value, BiFunction)
How to update mapping using given BiFunction (new in Java 8). - Java Util Map.putIfAbsent(key, value)
How to add to map only when it doesn’t contain given mapping (new in Java 8). - Java Util Map remove(key, value)
How to conditionally remove entry for the key (new in Java 8). - Java Util Map replace(key, value)
How to replace existing value in the map (new in Java 8). - Java Util Map replace(key, oldValue, newValue)
How to replace mappings conditionally. - Java Util Map replaceAll(BiFunction)
How to replace all mappings with result of application of BiFunction.
Java Util Properties
- Java list Properties
Shows how to list Properties into PrintWriter or PrintStream. - Java Properties load
Shows how to load Properties from InputStream. - Java Properties load from XML
Shows how to load Properties from an XML. - Java Properties store
Shows how to store Java Properties into OutputStream. - Java Properties store as XML
Did you know that Java Properties can be stored as XML? Here’s how.
Java Util Regular Expressions
- Java 8 named capturing groups
Learn how to use named capturing groups in your regexps to make them more readable. - Java Regex matching IP Address
How to write IP Address Validator using Java Regular Expressions! - Java Regex to remove duplicated words
How to remove duplicate words using Regular Expressions in Java!
Java Util ResourceBundle
- Java ResourceBundle – internationalized program
How to implement internationalized dictionary using ResourceBundle. - Java programmatic ResourceBundle – dynamic translations
How to use ResourceBundles to provide translations dynamically. - Java ListResourceBundle example
How to use ListResourceBundle to simplify ResourceBundle implementation.
Java Util Scanner
- Java Scanner from String, File/Path, InputStream
How to read data from different input sources.
Java Util Zip
- Java zip file
Shows how to zip/unzip files.
