Java String

Java String class has a lot of methods. There are many methods to get the characters of the string object. There are many methods to split the string into an array or to create substrings. Since String is immutable, the original string remains unchanged. If the method is returning a string object, it’s creating a […]

Sometimes we have to perform authentication in our application. Most of the times, we ask the user to provide the user id and password to validate them. Why prefer Char[] array over String for Password? We can store the password in a String variable. But, the char[] array is preferred over String to store password

A string literal is is the sequence of characters enclosed in double-quotes. Java String literals are the preferred way to create string objects. They are string objects created in the string pool area. Creating String Literal in Java Where is String Literal stored in Java? The string literals are always stored in the string pool.

Java String chars() method returns an IntStream. The stream contains the integer code point values of the characters in the string object. This method was added to the String class in Java 9 release. Java String chars() Method Examples Let’s look into some simple examples of chars() method. 1. Printing the String Character Code Points

Java StringTokenizer class is used to break a string into tokens based on the specified delimiter. This class implements Enumeration interface. Java StringTokenizer Constructors The StringTokenizer class has three constructors. StringTokenizer(String str): This creates a string tokenizer instance with the given string and default delimiter characters. The default delimiter characters are the space character (

Java String transform() method is used to apply a function to this string. The function should accept a single string argument and return an object. This utility method was added to String class in Java 12 release. String transform() Method Syntax The transform method is defined as follows: The Function is a functional interface that

There are many ways to remove whitespaces from a string in Java. Note that the string is immutable, so the original string remains unchanged. We have to assign the result string to a variable to use it later on. Remove whitespace from String using replace() method There are many characters that come under whitespace category.

Sometimes we have to generate random string in Java. Usually, a random string is used to create a unique identifier for session, database table primary key, etc. Algorithm to Generate Random String in Java Create an alphanumeric string that contains all the ASCII uppercase and lowercase characters and digits. Use the Random class to generate

The simple approach to swap two strings in Java is by using a third variable. But, we can also swap two strings without using the third variable. Swap Two Strings in Java using Third Variable Here is the simple program to swap two strings using a third variable. Output: Swap Two Strings in Java without

Java StringJoiner is a utility class to create a sequence of characters separated by a delimiter. When creating StringJoiner instance, we can also specify the prefix and suffix character sequence. If StringJoiner doesn’t have any sequence added, its toString() method will return “prefix+suffix” string. We can call setEmptyValue() method to set the output of the