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## org.apache.tools.ant.launch
Class Launcher

    java.lang.Object
      org.apache.tools.ant.launch.Launcher

    public class Launcher

extends java.lang.Object

This is a launcher for Ant.

Since:
  Ant 1.6

Field Summary
`static java.lang.String` | `ANT_PRIVATEDIR` The directory name of the per-user ant directory.
`static java.lang.String` | `ANT_PRIVATELIB` The name of a per-user library directory.
`static java.lang.String` | `ANTHOME_PROPERTY` The Ant Home (installation) Directory property.
`static java.lang.String` | `ANTLIBDIR_PROPERTY` The Ant Library Directory property.
`protected static int` | `EXIT_CODE_ERROR` Exit code on trouble
`static boolean` | `launchDiag` launch diagnostics flag; for debugging trouble at launch time.
`static java.lang.String` | `MAIN_CLASS` The startup class that is to be run.
`static java.lang.String` | `USER_HOMEDIR` System property with user home directory.
`static java.lang.String` | `USER_LIBDIR` The location of a per-user library directory.

Constructor Summary
`Launcher()`

Method Summary
`static void` | `main(java.lang.String[] args)` Entry point for starting command line Ant.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### ANTHOME_PROPERTY

    public static final java.lang.String ANTHOME_PROPERTY

  The Ant Home (installation) Directory property. "ant.home"

  See Also:
    Constant Field Values

### ANTLIBDIR_PROPERTY

    public static final java.lang.String ANTLIBDIR_PROPERTY

  The Ant Library Directory property. "ant.library.dir"

  See Also:
    Constant Field Values

### ANT_PRIVATEDIR

    public static final java.lang.String ANT_PRIVATEDIR

  The directory name of the per-user ant directory. ".ant"

  See Also:
    Constant Field Values

### ANT_PRIVATELIB

    public static final java.lang.String ANT_PRIVATELIB

  The name of a per-user library directory. "lib"

  See Also:
    Constant Field Values

### launchDiag

    public static boolean launchDiag

  launch diagnostics flag; for debugging trouble at launch time.

### USER_LIBDIR

    public static final java.lang.String USER_LIBDIR

  The location of a per-user library directory.

  It's value is the concatenation of `ANT_PRIVATEDIR` with `ANT_PRIVATELIB`, with an appropriate file separator in between. For example, on Unix, it's `.ant/lib`.

### MAIN_CLASS

    public static final java.lang.String MAIN_CLASS

  The startup class that is to be run. "org.apache.tools.ant.Main"

  See Also:
    Constant Field Values

### USER_HOMEDIR

    public static final java.lang.String USER_HOMEDIR

  System property with user home directory. "user.home"

  See Also:
    Constant Field Values

### EXIT_CODE_ERROR

    protected static final int EXIT_CODE_ERROR

  Exit code on trouble

  See Also:
    Constant Field Values

Constructor Detail

### Launcher

    public Launcher()

Method Detail

### main

    public static void main(java.lang.String[] args)

  Entry point for starting command line Ant.

  Parameters:
    `args` - commandline arguments

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