The length() method returns the length of a specified string. Note: The length of an empty string is 0.

Dec 23, 2024 · In this article, we will see how to find the length of a string using the String length () method. Example: Important Points: The length () method returns the number of characters present in the string. Suitable for string objects but not for arrays. Can also be used for StringBuilder and StringBuffer classes. It is a public member method.

To get the number of Unicode codepoints in a String use str.codePointCount(0, str.length()) -- see the javadoc. To get the size (in bytes) of a String in a specific encoding (i.e. charset) use str.getBytes(charset).length 2.

Mar 24, 2025 · The Java String class's length() function yields the total number of characters (or Unicode code units) in the string. The length of a string may be easily and quickly determined with this method that is helpful for a variety of string manipulation tasks.

Jun 27, 2024 · The simplest way to find the length of a string in Java is to use the length() method of the String class, int len = str.length(); This method returns the number of characters in the string. Here’s a quick example: In this example, we have a string str with the value “Hello World”.

Jun 9, 2022 · How to find the length of a Java String. Follow these steps to find the length of a String in Java: Declare a variable of type String; Initialize the String variable to a non-null value; Call the Java String length() method; Hold the value of the String length in a variable for future use; Java String length method()

Feb 1, 2025 · Best Practices for Using String Length. Here are 3 top best practices I recommend for leveraging Java‘s string length() effectively: Cache lengths – For immutable strings, calculate once and store length in variable instead of recomputing. Use comparison – Compare lengths directly instead of subtracting as it short circuits evaluation.

In this guide, you will learn about the String length () method in Java programming and how to use it with an example. 1. String length () Method Overview. The length () method of Java's String class returns the number of characters (including whitespace) in the specified string. - This method doesn't accept any parameters.

In this tutorial, you will learn about the Java String length () method with the help of examples.

Sep 11, 2022 · Java String length () method is used to find out the length of a String. This method counts the number of characters in a String including the white spaces and returns the count. Java String length () Method int length () This method returns an integer number which represents the number of characters (length) in a given string.