Package weka.core
Class Tee
- java.lang.Object
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- java.io.OutputStream
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- java.io.FilterOutputStream
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- java.io.PrintStream
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- weka.core.Tee
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- 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)
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-
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)
Writeslen
bytes from the specified byte array starting at offsetoff
to this stream.void
write(int b)
Writes the specified byte to this stream.
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Method Detail
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clear
public void clear()
removes all streams and places the default printstream, if any, again in the list.- See Also:
getDefault()
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getDefault
public java.io.PrintStream getDefault()
returns the default printstrean, can be NULL.- Returns:
- the default printstream
- See Also:
m_Default
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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
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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 addtimestamp
- whether to use timestamps or not
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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 addtimestamp
- whether to use timestamps or notprefix
- the prefix to use
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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
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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
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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
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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
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size
public int size()
returns the number of streams currently in the list.- Returns:
- the number of streams in the list
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flush
public void flush()
flushes all the printstreams.- Specified by:
flush
in interfacejava.io.Flushable
- Overrides:
flush
in classjava.io.PrintStream
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print
public void print(int x)
prints the given int to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(long x)
prints the given long to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(float x)
prints the given float to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(double x)
prints the given double to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(boolean x)
prints the given boolean to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(char x)
prints the given char to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(char[] x)
prints the given char array to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(java.lang.String x)
prints the given string to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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print
public void print(java.lang.Object x)
prints the given object to the streams.- Overrides:
print
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println()
prints a new line to the streams.- Overrides:
println
in classjava.io.PrintStream
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println
public void println(int x)
prints the given int to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println(long x)
prints the given long to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println(float x)
prints the given float to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println(double x)
prints the given double to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println(boolean x)
prints the given boolean to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println(char x)
prints the given char to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println(char[] x)
prints the given char array to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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println
public void println(java.lang.String x)
prints the given string to the streams.- Overrides:
println
in classjava.io.PrintStream
- Parameters:
x
- the object to print
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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 classjava.io.PrintStream
- Parameters:
x
- the object to print
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write
public void write(byte[] buf, int off, int len)
Writeslen
bytes from the specified byte array starting at offsetoff
to this stream. If automatic flushing is enabled then theflush
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)
orprintln(char)
methods.- Overrides:
write
in classjava.io.PrintStream
- Parameters:
buf
- A byte arrayoff
- Offset from which to start taking byteslen
- Number of bytes to write
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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 theflush
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)
orprintln(char)
methods.- Overrides:
write
in classjava.io.PrintStream
- Parameters:
b
- The byte to be written- See Also:
print(char)
,println(char)
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toString
public java.lang.String toString()
returns only the classname and the number of streams.- Overrides:
toString
in classjava.lang.Object
- Returns:
- only the classname and the number of streams
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Returns:
- the revision
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