## 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
`JarLibDisplayTask()`

Method Summary
`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.