# Class NotConstraint

java.lang.Object
com.codename1.ui.validation.NotConstraint

All Implemented Interfaces:
  `Constraint`

public class NotConstraint extends Object implements Constraint
Negates a group of constraints, such that, if any of its child constraints is true, it returns false.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `NotConstraint(Constraint... children)`
  Creates a new NotConstraint
  `NotConstraint(String failMessage, Constraint... children)`
  Creates a new NotConstraint

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `getDefaultFailMessage()`
  Includes the error message for the constraint
  `boolean`
  `isValid(Object value)`
  Indicates if the given value is valid or not

  ### Methods inherited from class Object

  `clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### NotConstraint

    public NotConstraint(Constraint... children)

    Creates a new NotConstraint

    ###### Parameters

    - `children`: the child constraints

  - ### NotConstraint

    public NotConstraint(String failMessage, Constraint... children)

    Creates a new NotConstraint

    ###### Parameters

    - `failMessage`: the default error message if the constraint fails

    - `children`: the child constraints

- ## Method Details

  - ### isValid

    public boolean isValid(Object value)

    Indicates if the given value is valid or not

    ###### Parameters

    - `value`: the value for the object

    ###### Returns

    true if the value is valid and false otherwise

    Specified by:
      `isValid` in interface `Constraint`

  - ### getDefaultFailMessage

    public String getDefaultFailMessage()

    Includes the error message for the constraint

    ###### Returns

    the text of the error message for a constraint

    Specified by:
      `getDefaultFailMessage` in interface `Constraint`