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Remove Emojis from a Java String 1. Overview Emojis are becoming more popular in text messaging these days – sometimes we need to clean our text from them and other symbols. In this tutorial, we’ll discuss different ways to remove emojis from a String in Java. 2. Using Emoji Library… Continue Reading java-string-remove-emojis
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Java toString() Method 1. Overview Every class in Java is a child of the Object class either directly or indirectly. And since the Object class contains a toString() method, we can call toString() on any instance and get its string representation. In this tutorial, we’ll look at the default behavior of toString() and learn how to… Continue Reading java-tostring
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Sorting Strings by Contained Numbers in Java 1. Introduction In this tutorial, we’ll look at how to sort alphanumeric Strings by the numbers they contain. We’ll focus on removing all non-numeric characters from the String before sorting multiple Strings by the numerical characters that remain. We’ll look at common edge cases, including empty Strings… Continue Reading java-sort-strings-contained-numbers
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Guava CharMatcher In this quick tutorial we’ll explore the CharMatcher utility class in Guava. 1. Remove Special Characters from a String Let’s start by removing all special characters from a String. In the following example, we remove all characters that aren’t digit or letter using retainFrom(): @Test public void whenRemoveSpecialCharacters_thenRemoved(){… Continue Reading guava-string-charmatcher
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Checking for Empty or Blank Strings in Java 1. Introduction In this tutorial, we’ll go through some ways of checking for empty or blank strings in Java. We’ve got some native language approaches as well as a couple of libraries. 2. Empty vs. Blank It’s, of course, pretty common to… Continue Reading java-blank-empty-strings
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How to Remove the Last Character of a String? 1. Overview In this quick article, we are going to check and discuss different techniques for removing the last character of a String. 2. Using String.substring() The easiest way is to use the built-in substring() method of the String class. In… Continue Reading java-remove-last-character-of-string
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Java Multi-line String 1. Overview Due to the fact that there is no native multi-line string class in Java yet, it’s a little bit tricky to create and utilize multi-line strings. In this tutorial, we walk through several methods to make and use multi-line strings in Java. 2. Getting the… Continue Reading java-multiline-string
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Why String is Immutable in Java? 1. Introduction In Java, Strings are immutable. An obvious question that is quite prevalent in interviews is “Why Strings are designed as immutable in Java?” James Gosling, the creator of Java, was once asked in an interview when should one use immutables, to which he… Continue Reading java-string-immutable
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Sorting a String Alphabetically in Java 1. Overview In this tutorial, we’ll show how to sort String alphabetically. There might be plenty of reason why we’d like to do it – one of them could be validation if two words are composed of the same characters set. That way, we’ll… Continue Reading java-sort-string-alphabetically
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StringBuilder and StringBuffer in Java 1. Overview In this short article, we’re going to look at similarities and differences between StringBuilder and StringBuffer in Java. Simply put, StringBuilder was introduced in Java 1.5 as a replacement for StringBuffer. 2. Similarities Both StringBuilder and StringBuffer create objects that hold a mutable… Continue Reading java-string-builder-string-buffer
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