## 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

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.

Author:
  Peter Donald

Field Summary

Fields inherited from class org.apache.tools.ant.Task
`description, location, target, taskName, taskType, wrapper`

Fields inherited from class org.apache.tools.ant.ProjectComponent
`project`

Constructor Summary
`JarLibDisplayTask()`

Method Summary
`void` `addFileset(FileSet fileSet)` Adds a set of files about which library data will be displayed.
`void` `execute()` Called by the project to let the task do its work.
`void` `setFile(java.io.File file)` The JAR library to display information for.

Methods inherited from class org.apache.tools.ant.Task
`getDescription, getLocation, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, handleErrorFlush, handleErrorOutput, handleFlush, handleOutput, init, isInvalid, log, log, maybeConfigure, perform, setDescription, setLocation, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName`

Methods inherited from class org.apache.tools.ant.ProjectComponent
`getProject, setProject`

Methods inherited from class java.lang.Object
`clone, 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

  Description copied from class: `Task`
  Called by the project to let the task do its work. This method may be called more than once, if the task is invoked more than once. For example, if target1 and target2 both depend on target3, then running "ant target1 target2" will run all tasks in target3 twice.

  Overrides:
    `execute` in class `Task`
  Throws:
    `BuildException` - if something goes wrong with the build

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