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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.

java_swing_validation.png

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.