Java

Java String format() method returns a formatted string using the given format and the arguments. It’s inspired by the C language sprintf() method. String format() Methods There are two variants of the String format() method. Both of these methods are static. format(String format, Object… args): This method uses the system default locale for the formatting. […]

Java String isEmpty() method returns true if the string length is 0, else returns false. This utility method was added to String class in Java 1.6 version. Java String isEmpty() Method Implementation The internal implementation of isEmpty() method is: Java String isEmpty() Method Examples Let’s look at some examples of using isEmpty() method. 1. String

Java String endsWith() method is used to test if this string ends with the given suffix string or not. This method is case sensitive. Java String endsWith() Method Implementation The String endsWith() method internally calls the startsWith() method. The method implementation from the Java Doc is: String endsWith() Method Example Here is a simple example

Java String startsWith() method is used to test if the string starts with the given prefix. This method is case sensitive. String startsWith() Methods There are two variants of startsWith() method. startsWith(String prefix): used to determine if the string starts with the specified prefix or not. If the prefix is empty string then this method

Java StringBuilder class is used to manipulate string objects. StringBuilder is a mutable sequence of characters. StringBuilder was introduced in Java 1.5 StringBuilder methods are not thread-safe, so it’s recommended for the single-threaded environment. You should use StringBuffer in a multithreaded environment for thread safety. Some of the common operations StringBuilder provides are – append, insert,

Java StringBuffer class is used to manipulate string objects. StringBuffer is a thread-safe mutable sequence of characters. StringBuffer methods are synchronized, so it’s advised to use it for string manipulation in a multithreaded environment. Some of the common operations StringBuffer provides are – append, insert, reverse, and delete. StringBuilder class was introduced in Java 1.5,

Java String array is used to store a fixed number of string objects. String arrays are used a lot in Java programs. Even the Java main method parameter is a string array. The common use cases are – read CSV data into a string array, read text file lines into a string array. How to

Java String equalsIgnoreCase() method compares this string with the argument string without case consideration. This method returns true if both the strings have the same character sequence, ignoring their case. String equalsIgnoreCase() Method Implementation The equalsIgnoreCase() method is implemented like this. The Logic for Characters Comparison Ignoring Case The two characters c1 and c2 are

Java String contentEquals() method returns true if this string has the same character sequence as the method argument. String contentEquals() Method Signatures There are two overloaded version of contentEquals() method. public boolean contentEquals(CharSequence cs): The string object content is compared with the CharSequence argument. If the character sequence is exactly the same, then this method