Java 25 (LTS) reference · String Methods

Java String length() Method

Return the number of characters (UTF-16 code units) in a string. An empty string has length 0.

Java 25 (LTS) Since Java 1.0

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Syntax

string.length()

Return value

An int.

Examples

Count characters

public class Main {
    public static void main(String[] args) {
        String name = "ReadyCamel";
        System.out.println(name.length());
        System.out.println("".length());
    }
}

Output

10
0

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Validate a minimum length

public class Main {
    public static void main(String[] args) {
        String password = "hunter2";
        if (password.length() < 8) {
            System.out.println("Password must be at least 8 characters");
        }
    }
}