Package org.apache.tools.ant.taskdefs

## Class BuildNumber

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.Task
    - - org.apache.tools.ant.taskdefs.BuildNumber

All Implemented Interfaces:
  `java.lang.Cloneable`

    public class BuildNumber
    extends Task

Read, increment, and write a build number in a file It will first attempt to read a build number from a file, then set the property "build.number" to the value that was read in (or 0 if no such value). Then it will increment the build number by one and write it back out into the file.

Since:
  Ant 1.5

### 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
`BuildNumber()`

### Method Summary

All Methods Instance Methods Concrete Methods
`void` `execute()` Run task.
`void` `setFile​(java.io.File file)` The file in which the build number is stored.

### 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

#### BuildNumber

    public BuildNumber()

### Method Detail

#### setFile

    public void setFile​(java.io.File file)

The file in which the build number is stored. Defaults to "build.number" if not specified.

Parameters:
  `file` - the file in which build number is stored.

#### execute

    public void execute()
                 throws BuildException

Run task.

Overrides:
  `execute` in class `Task`
Throws:
  `BuildException` - if an error occurs