org.apache.tools.ant.util

## Class KeepAliveOutputStream

- java.lang.Object
- - java.io.OutputStream
  - - java.io.FilterOutputStream
    - - org.apache.tools.ant.util.KeepAliveOutputStream

All Implemented Interfaces:
  java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

    public class KeepAliveOutputStream
    extends java.io.FilterOutputStream

Class that can be used to wrap `System.out` and `System.err` without getting anxious about any client closing the stream.

In code-language it means that it is not necessary to do:

     if (out != System.out && out != System.err) {
       out.close();
     }

### Field Summary

### Fields inherited from class java.io.FilterOutputStream

`out`

### Constructor Summary

Constructors
Constructor and Description
`KeepAliveOutputStream(java.io.OutputStream out)` Constructor of KeepAliveOutputStream.

### Method Summary

All Methods Static Methods Instance Methods Concrete Methods
`void` `close()` This method does nothing.
`static java.io.PrintStream` `wrapSystemErr()` Convenience factory method that returns a non-closing PrintStream around System.err.
`static java.io.PrintStream` `wrapSystemOut()` Convenience factory method that returns a non-closing PrintStream around System.out.

### Methods inherited from class java.io.FilterOutputStream

`flush, write, write, write`

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

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

### Constructor Detail

#### KeepAliveOutputStream

    public KeepAliveOutputStream(java.io.OutputStream out)

Constructor of KeepAliveOutputStream.

Parameters:
  `out` - an OutputStream value, it should be standard output.

### Method Detail

#### close

    public void close()
               throws java.io.IOException

This method does nothing.

Specified by:
  `close` in interface `java.io.Closeable`
Specified by:
  `close` in interface `java.lang.AutoCloseable`
Overrides:
  `close` in class `java.io.FilterOutputStream`
Throws:
  `java.io.IOException` - as we are overriding FilterOutputStream.

#### wrapSystemOut

    public static java.io.PrintStream wrapSystemOut()

Convenience factory method that returns a non-closing PrintStream around System.out.

Returns:
  PrintStream
Since:
  Ant 1.8.0

#### wrapSystemErr

    public static java.io.PrintStream wrapSystemErr()

Convenience factory method that returns a non-closing PrintStream around System.err.

Returns:
  PrintStream
Since:
  Ant 1.8.0