org.apache.tools.ant.taskdefs.condition

## Class Not

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.taskdefs.condition.ConditionBase
    - - org.apache.tools.ant.taskdefs.condition.Not

- All Implemented Interfaces:
    java.lang.Cloneable, Condition

      public class Not
      extends ConditionBase
      implements Condition

  <not> condition. Evaluates to true if the single condition nested into it is false and vice versa.
  Since:
    Ant 1.4

- - ### Field Summary

    - ### Fields inherited from class org.apache.tools.ant.ProjectComponent

      `description, location, project`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `Not()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `eval()` Evaluate condition

    - ### Methods inherited from class org.apache.tools.ant.taskdefs.condition.ConditionBase

      `add, addAnd, addAvailable, addChecksum, addContains, addEquals, addFilesMatch, addHttp, addIsFalse, addIsFileSelected, addIsReference, addIsSet, addIsTrue, addNot, addOr, addOs, addSocket, addUptodate, countConditions, getConditions, getTaskName, setTaskName`

    - ### Methods inherited from class org.apache.tools.ant.ProjectComponent

      `clone, getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProject`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### Not

          public Not()

  - ### Method Detail

    - #### eval

          public boolean eval()
                       throws BuildException

      Evaluate condition
      Specified by:
        `eval` in interface `Condition`
      Returns:
        true if the condition is true.
      Throws:
        `BuildException` - if the condition is not configured correctly.