org.apache.tools.ant.taskdefs.optional.extension

## Class JarLibDisplayTask

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.Task
    - - org.apache.tools.ant.taskdefs.optional.extension.JarLibDisplayTask

- All Implemented Interfaces:
    java.lang.Cloneable

      public class JarLibDisplayTask
      extends Task

  Displays the "Optional Package" and "Package Specification" information contained within the specified JARs.

  Prior to JDK1.3, an "Optional Package" was known as an Extension. The specification for this mechanism is available in the JDK1.3 documentation in the directory $JDK_HOME/docs/guide/extensions/versioning.html. Alternatively it is available online at http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html.

- - ### Field Summary

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

      `target, taskName, taskType, wrapper`

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

      `description, location, project`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JarLibDisplayTask()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addFileset(FileSet fileSet)` Adds a set of files about which library data will be displayed.
    `void` | `execute()` Execute the task.
    `void` | `setFile(java.io.File file)` The JAR library to display information for.

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

      `bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

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

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

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

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

- - ### Constructor Detail

    - #### JarLibDisplayTask

          public JarLibDisplayTask()

  - ### Method Detail

    - #### setFile

          public void setFile(java.io.File file)

      The JAR library to display information for.
      Parameters:
        `file` - The jar library to display information for.

    - #### addFileset

          public void addFileset(FileSet fileSet)

      Adds a set of files about which library data will be displayed.
      Parameters:
        `fileSet` - a set of files about which library data will be displayed.

    - #### execute

          public void execute()
                       throws BuildException

      Execute the task.
      Overrides:
        `execute` in class `Task`
      Throws:
        `BuildException` - if the task fails.