课程: Java Algorithms

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Validate strings in Java: Specific properties

Validate strings in Java: Specific properties - Java教程

课程: Java Algorithms

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Validate strings in Java: Specific properties

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- [Instructor] Sometimes, we need to validate more specific properties on a given piece of data. For example, we might want to check if a string has at least one digit or at least one upper case letter. Validating specific properties can come in handy if we need to verify password complexity. Let's create an algorithm that validates this complexity. In other words, whether a string has at least one number, one uppercase letter, and one lowercase letter. We'll call it, is password complex. For the implementation, will iterate through the characters, s dot chars, but instead of using all match, we'll use the any match method. This will return true as long as any character in the string meets the inputted requirement. Our requirements are one upper case, one lower case and one number, let's add in those. We'll call any match with each requirement and then use the and operator to link them into a single expression. We'll return that from the function, we'll check is uppercase then at…

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