Using String Length Method in Java

In Java, one of the essential classes is the String class, packed with various functions to aid developers in managing and manipulating strings. Among these functions, the `length()` is precious. The primary function of `length()` is to count the number of characters in a given string, including every character, be it a letter, a number, punctuation, or even a space. Thus, for a string like "Hello World", the length() function would return 11. However, it's essential to note that the `length()` function operates on the premise of counting 16-bit Unicode characters. This means that the function's return value might only sometimes accurately represent the number of code points present in a string, especially when dealing with strings that contain surrogate pairs. Surrogate pairs are a pair of 16-bit units that represent a single character in certain Unicode representations. Given this, if a string contains these pairs, the output from `length()` might be slightly skewed. Yet, in the vast majority of practical applications, the slight intricacies of this distinction don't create noticeable problems, and the `length()` function proves to be both quick and efficient in providing an immediate count of characters in a string. Understanding these nuances ensures that programmers use the function optimally and are aware of its underlying workings. In this Java String Length example, мы создали строку и определили ее длину. Click Execute to run the Java String Length online and see the result.
Using String Length Method in Java Execute 
public class StringLengthDemo {
    public static void main(String[] args) {
        String example = "Hello, World!";
        
        int stringLength = example.length();
        
        System.out.println("The length of the string '" + example + "' is: " + stringLength);
    }
}
Updated: Viewed: 46 times


Java String Length Related API examples and articles