Java Strings

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Page Index

1. Introduction
2. How to create a string
3. f string

Related

• Java Strings Methods
• Java String Builder

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Introduction

In Java, a String is a class, not a primitive data type. It represents a sequence of characters.

Unlike primitive data types, a String is an object, which means it has methods you can use, support for character strings is implemented via java.lang.String class.

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How to create a string

In Java, String is a special class and you can initialise a String object using string literals directly, without the need to call a constructor.

Here’s an example of creating a String using a constructor:

char[] charArray = {'H', 'e', 'l', 'l', 'o'};
String str = new String(charArray);
System.out.println(str);  // Outputs: Hello

However, it’s important to note that it’s more common and simpler to create a String object directly from a string literal, like this:

String str = "Hello";
System.out.println(str);  // Outputs: Hello 

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f string

Java you can use String.format() method which works similarly to [[Java Output#printf|printf()]]. It allows you to create a new string using a format string and arguments. Here is an example:

String name = "John";
int age = 30;
 
String formattedString = String.format("Hello, my name is %s and I am %d years old.", name, age);
System.out.println(formattedString);

In this example, %s is a placeholder for a string, and %d is a placeholder for an integer. The variables name and age are inserted into these placeholders respectively.

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