Java StringTag ArchiveSubscribe

Java String.replaceAll() The method replaceAll() replaces all occurrences of a String in another String. Available Signatures [source,java,gutter:,false] public String replaceAll(String regex, String replacement) Example [source,java,gutter:,true] @Test public void whenCallReplace_thenCorrect() { String s = “I learn Spanish”; assertEquals(“I learn French”, s.replaceAll(“Spanish”, “French”)); }

Java String.substring() The method substring() comes with two signatures. If we pass the beginIndex and the endIndex to the method, then it obtains a part of a String given the starting index and the length of the result. We can also pass the beginIndex only and obtain the part of… Continue Reading substring

Java String.startsWith() The method startsWith() is a convenience method that checks whether a String starts with another String. We can also pass the index of the first character to start checking from. Available Signatures [source,java,gutter:,false] public boolean startsWith(String prefix) public boolean startsWith(String prefix, int toffset) Example [source,java,gutter:,true] @Test public void… Continue Reading starts-with

Java String.trim() The method trim() removes any whitespace at the beginning and at the end of a String. If the String contains only spaces, then the method returns an empty String. Available Signatures [source,java,gutter:,false] public String trim() Example [source,java,gutter:,true] @Test public void whenTrim_thenCorrect() { assertEquals(“foo”, ” foo “.trim()); }

String API Updates in Java 12 1. Introduction Java 12 added a couple of useful APIs to the String class. In this tutorial, we will explore these new APIs with examples. 2. indent() The indent() method adjusts the indentation of each line of the string based on the argument passed… Continue Reading java12-string-api

Converting a List to String in Java 1. Introduction In this quick article, we’ll have a look at how to convert a List of elements to a String. This might be useful in certain scenarios like printing the contents to the console in a human-readable form for inspection/debugging. 2. Standard… Continue Reading java-list-to-string

Guide to java.util.Formatter 1. Overview In this article, we’ll discuss the String formatting in Java using the java.util.Formatter class, which provides support for the layout justification and alignment. 2. How to Use the Formatter Remember C’s printf? Formatting a String in Java feels very similar. The format() method of the… Continue Reading java-string-formatter

Convert Character Array to String in Java 1. Overview In this quick tutorial, we’ll cover various ways to convert a character array to a String in Java. 2. String Constructor The String class has a constructor that accepts a char array as an argument: @Test public void whenStringConstructor_thenOK() { final… Continue Reading java-char-array-to-string

Check if a String is a Palindrome 1. Introduction In this article, we’re going to see how we can check whether a given String is a palindrome using Java. A palindrome is a word, phrase, number, or other sequences of characters which reads the same backward as forward, such as… Continue Reading java-palindrome