java.lang.Object
- java.io.OutputStream
- - java.io.FilterOutputStream
  - - java.io.PrintStream
    - - weka.core.Tee

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

public class Tee
extends java.io.PrintStream
implements RevisionHandler

This class pipelines print/println's to several PrintStreams. Useful for redirecting System.out and System.err to files etc.
E.g., for redirecting stderr/stdout to files with timestamps and:

    import java.io.*;
    import weka.core.Tee;

    ...
    // stdout
    Tee teeOut = new Tee(System.out);
    teeOut.add(new PrintStream(new FileOutputStream("out.txt")), true);
    System.setOut(teeOut);
    
    // stderr
    Tee teeErr = new Tee(System.err);
    teeErr.add(new PrintStream(new FileOutputStream("err.txt")), true);
    System.setOut(teeErr);
    ...

Version:: $Revision: 5057 $
Author:: FracPete (fracpete at waikato dot ac dot nz)

Constructor Summary

Constructors
Constructor	Description
`Tee()`	initializes the object, with a default printstream.
`Tee(java.io.PrintStream def)`	initializes the object with the given default printstream, e.g., System.out.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`add(java.io.PrintStream p)`	adds the given PrintStream to the list of streams, with NO timestamp and NO prefix.
`void`	`add(java.io.PrintStream p, boolean timestamp)`	adds the given PrintStream to the list of streams, with NO prefix.
`void`	`add(java.io.PrintStream p, boolean timestamp, java.lang.String prefix)`	adds the given PrintStream to the list of streams.
`void`	`clear()`	removes all streams and places the default printstream, if any, again in the list.
`boolean`	`contains(java.io.PrintStream p)`	checks whether the given PrintStream is already in the list.
`void`	`flush()`	flushes all the printstreams.
`java.io.PrintStream`	`get(int index)`	returns the specified PrintStream from the list.
`java.io.PrintStream`	`getDefault()`	returns the default printstrean, can be NULL.
`java.lang.String`	`getRevision()`	Returns the revision string.
`void`	`print(boolean x)`	prints the given boolean to the streams.
`void`	`print(char x)`	prints the given char to the streams.
`void`	`print(char[] x)`	prints the given char array to the streams.
`void`	`print(double x)`	prints the given double to the streams.
`void`	`print(float x)`	prints the given float to the streams.
`void`	`print(int x)`	prints the given int to the streams.
`void`	`print(long x)`	prints the given long to the streams.
`void`	`print(java.lang.Object x)`	prints the given object to the streams.
`void`	`print(java.lang.String x)`	prints the given string to the streams.
`void`	`println()`	prints a new line to the streams.
`void`	`println(boolean x)`	prints the given boolean to the streams.
`void`	`println(char x)`	prints the given char to the streams.
`void`	`println(char[] x)`	prints the given char array to the streams.
`void`	`println(double x)`	prints the given double to the streams.
`void`	`println(float x)`	prints the given float to the streams.
`void`	`println(int x)`	prints the given int to the streams.
`void`	`println(long x)`	prints the given long to the streams.
`void`	`println(java.lang.Object x)`	prints the given object to the streams (for Throwables we print the stack trace).
`void`	`println(java.lang.String x)`	prints the given string to the streams.
`java.io.PrintStream`	`remove(int index)`	removes the given PrintStream from the list.
`java.io.PrintStream`	`remove(java.io.PrintStream p)`	removes the given PrintStream from the list.
`int`	`size()`	returns the number of streams currently in the list.
`java.lang.String`	`toString()`	returns only the classname and the number of streams.
`void`	`write(byte[] buf, int off, int len)`	Writes `len` bytes from the specified byte array starting at offset `off` to this stream.
`void`	`write(int b)`	Writes the specified byte to this stream.

Methods inherited from class java.io.PrintStream
append, append, append, checkError, close, format, format, printf, printf

Methods inherited from class java.io.FilterOutputStream
write

Methods inherited from class java.io.OutputStream
nullOutputStream

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Tee
```
public Tee()
```
    initializes the object, with a default printstream.
  - Tee
```
public Tee(java.io.PrintStream def)
```
    initializes the object with the given default printstream, e.g., System.out.
    
    Parameters:
    
    def - the default printstream, remains also after calling clear()
- Method Detail
  - clear
```
public void clear()
```
    removes all streams and places the default printstream, if any, again in the list.
    
    See Also:
    
    getDefault()
  - getDefault
```
public java.io.PrintStream getDefault()
```
    returns the default printstrean, can be NULL.
    
    Returns:
    
    the default printstream
    
    See Also:
    
    m_Default
  - add
```
public void add(java.io.PrintStream p)
```
    adds the given PrintStream to the list of streams, with NO timestamp and NO prefix.
    
    Parameters:
    
    p - the printstream to add
  - add
```
public void add(java.io.PrintStream p,
                boolean timestamp)
```
    adds the given PrintStream to the list of streams, with NO prefix.
    
    Parameters:
    
    p - the printstream to add
    
    timestamp - whether to use timestamps or not
  - add
```
public void add(java.io.PrintStream p,
                boolean timestamp,
                java.lang.String prefix)
```
    adds the given PrintStream to the list of streams.
    
    Parameters:
    
    p - the printstream to add
    
    timestamp - whether to use timestamps or not
    
    prefix - the prefix to use
  - get
```
public java.io.PrintStream get(int index)
```
    returns the specified PrintStream from the list.
    
    Parameters:
    
    index - the index of the PrintStream to return
    
    Returns:
    
    the specified PrintStream, or null if invalid index
  - remove
```
public java.io.PrintStream remove(java.io.PrintStream p)
```
    removes the given PrintStream from the list.
    
    Parameters:
    
    p - the PrintStream to remove
    
    Returns:
    
    returns the removed PrintStream if it could be removed, null otherwise
  - remove
```
public java.io.PrintStream remove(int index)
```
    removes the given PrintStream from the list.
    
    Parameters:
    
    index - the index of the PrintStream to remove
    
    Returns:
    
    returns the removed PrintStream if it could be removed, null otherwise
  - contains
```
public boolean contains(java.io.PrintStream p)
```
    checks whether the given PrintStream is already in the list.
    
    Parameters:
    
    p - the PrintStream to look for
    
    Returns:
    
    true if the PrintStream is in the list
  - size
```
public int size()
```
    returns the number of streams currently in the list.
    
    Returns:
    
    the number of streams in the list
  - flush
```
public void flush()
```
    flushes all the printstreams.
    
    Specified by:
    
    flush in interface java.io.Flushable
    
    Overrides:
    
    flush in class java.io.PrintStream
  - print
```
public void print(int x)
```
    prints the given int to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(long x)
```
    prints the given long to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(float x)
```
    prints the given float to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(double x)
```
    prints the given double to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(boolean x)
```
    prints the given boolean to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(char x)
```
    prints the given char to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(char[] x)
```
    prints the given char array to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(java.lang.String x)
```
    prints the given string to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - print
```
public void print(java.lang.Object x)
```
    prints the given object to the streams.
    
    Overrides:
    
    print in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println()
```
    prints a new line to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(int x)
```
    prints the given int to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(long x)
```
    prints the given long to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(float x)
```
    prints the given float to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(double x)
```
    prints the given double to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(boolean x)
```
    prints the given boolean to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(char x)
```
    prints the given char to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(char[] x)
```
    prints the given char array to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(java.lang.String x)
```
    prints the given string to the streams.
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - println
```
public void println(java.lang.Object x)
```
    prints the given object to the streams (for Throwables we print the stack trace).
    
    Overrides:
    
    println in class java.io.PrintStream
    
    Parameters:
    
    x - the object to print
  - write
```
public void write(byte[] buf,
                  int off,
                  int len)
```
    Writes len bytes from the specified byte array starting at offset off to this stream. If automatic flushing is enabled then the flush method will be invoked.
    Note that the bytes will be written as given; to write characters that will be translated according to the platform's default character encoding, use the print(char) or println(char) methods.
    
    Overrides:
    
    write in class java.io.PrintStream
    
    Parameters:
    
    buf - A byte array
    
    off - Offset from which to start taking bytes
    
    len - Number of bytes to write
  - write
```
public void write(int b)
```
    Writes the specified byte to this stream. If the byte is a newline and automatic flushing is enabled then the flush method will be invoked.
    Note that the byte is written as given; to write a character that will be translated according to the platform's default character encoding, use the print(char) or println(char) methods.
    
    Overrides:
    
    write in class java.io.PrintStream
    
    Parameters:
    
    b - The byte to be written
    
    See Also:
    
    print(char), println(char)
  - toString
```
public java.lang.String toString()
```
    returns only the classname and the number of streams.
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    only the classname and the number of streams
  - getRevision
```
public java.lang.String getRevision()
```
    Returns the revision string.
    
    Specified by:
    
    getRevision in interface RevisionHandler
    
    Returns:
    
    the revision

Class Tee

Constructor Summary

Method Summary

Methods inherited from class java.io.PrintStream

Methods inherited from class java.io.FilterOutputStream

Methods inherited from class java.io.OutputStream

Methods inherited from class java.lang.Object

Constructor Detail

Tee

Tee

Method Detail

clear

getDefault

add

add

add

get

remove

remove

contains

size

flush

print

print

print

print

print

print

print

print

print

println

println

println

println

println

println

println

println

println

println

write

write

toString

getRevision