Web Reference: Input validation is performed to ensure only properly formed data is entering the workflow in an information system, preventing malformed data from persisting in the database and triggering malfunction of various downstream components. Jan 16, 2026 · In this blog post, we will explore the fundamental concepts of input validation in Java, different usage methods, common practices, and best practices. There are two different types of input validation approaches: whitelist validation (sometimes referred to as inclusion or positive validation) and blacklist validation (sometimes known as exclusion or negative validation).
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