This little piece of code lets you to add validation to your Java Swing application forms. You can set verification to your JTextFields and JTextAreas with InputVerifier method, which is a native Java method.

Types of verifications this little piece of code supports are:

• Integer only w/ min and max values.
• Double only w/ min and max values.
• Max text length check.
• Not null check.

It lets you to disable your Save and/or Update buttons on the fly if any wrong input is given, or user skipped a not nullable area.