Web Reference: Definition and Usage The length() method returns the length of a specified string. Note: The length of an empty string is 0. In this example, we will be covering the simplest form of Java String length() method. We will initialize a String with some value and then we will calculate the length. Output: I ship Java in production every week, and I still call String.length() constantly. It’s the simplest sanity check in my toolbox: if a string is empty, too long, or unexpectedly short, your logic is off.
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