org.strbio.io
Class PrintfWriter

java.lang.Object
  java.io.Writer
      java.io.BufferedWriter
          org.strbio.io.PrintfWriter

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.Appendable, Printf

public class PrintfWriter
extends java.io.BufferedWriter
implements Printf

A Writer that you can do printf() on, like a civilized (C) programmer. This uses the sprintf routines in StringUtil. These routines are not thread-safe.

  Version 1.22, 5/1/07 - added constructor for other Writers; moved
    tests to PrintfTest
  Version 1.21, 3/29/99 - fixed to use updated StringUtil routines.
  Version 1.2, 6/4/98 - uses my StringUtil class instead of corejava.
  Version 1.1, 4/7/98 - fixed misc bugs.
  Version 1.0, 4/2/98 - original version.
  

Version:

1.22, 5/1/07

Author:

JMC

Field Summary

Fields inherited from class java.io.Writer

lock

Constructor Summary

PrintfWriter(java.io.File file)
Attaches to an open file?

PrintfWriter(java.io.FileDescriptor fd)
This is inherited from FileWriter.

PrintfWriter(java.io.FileWriter fw)
Attaches to an already open FileWriter.

PrintfWriter(java.io.OutputStream os)
Attaches to an OutputStream, such as System.out or System.err

PrintfWriter(java.lang.String fileName)
Open up a new file with a given name.

PrintfWriter(java.lang.String fileName, boolean append)
Open up a file with a given name.

PrintfWriter(java.io.Writer w)
Attaches to another Writer

Method Summary

void	printf(java.lang.String fmt) Prints a string to the output, without any formatting or parameter substitution (because there are no parameters)
void	printf(java.lang.String fmt, char x) Prints an integer to the output with some formatting.
void	printf(java.lang.String fmt, double x) Prints a double to the output with some formatting.
void	printf(java.lang.String fmt, float x) Prints a float to the output with some formatting.
void	printf(java.lang.String fmt, int x) Prints an integer to the output with some formatting.
void	printf(java.lang.String fmt, long x) Prints a long to the output with some formatting.
void	printf(java.lang.String fmt, java.lang.String x) Prints a String to the output with some formatting.

Methods inherited from class java.io.BufferedWriter

close, flush, newLine, write, write, write

Methods inherited from class java.io.Writer

append, append, append, write, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.strbio.io.Printf

flush

Constructor Detail

PrintfWriter

public PrintfWriter(java.lang.String fileName)
             throws java.io.IOException

Open up a new file with a given name. Will overwrite an existing file.

Throws:

java.io.IOException

See Also:

FileWriter

PrintfWriter

public PrintfWriter(java.lang.String fileName,
                    boolean append)
             throws java.io.IOException

Open up a file with a given name. If append is true, it appends to an existing file.

Throws:

java.io.IOException

See Also:

FileWriter

PrintfWriter

public PrintfWriter(java.io.File file)
             throws java.io.IOException

Attaches to an open file? This is inherited from FileWriter.

Throws:

java.io.IOException

See Also:

FileWriter

PrintfWriter

public PrintfWriter(java.io.FileWriter fw)
             throws java.io.IOException

Attaches to an already open FileWriter.

Throws:

java.io.IOException

See Also:

FileWriter

PrintfWriter

public PrintfWriter(java.io.FileDescriptor fd)
             throws java.io.IOException

This is inherited from FileWriter.

Throws:

java.io.IOException

See Also:

FileWriter

PrintfWriter

public PrintfWriter(java.io.OutputStream os)
             throws java.io.IOException

Attaches to an OutputStream, such as System.out or System.err

Throws:

java.io.IOException

See Also:

OutputStreamWriter, OutputStream

PrintfWriter

public PrintfWriter(java.io.Writer w)
             throws java.io.IOException

Attaches to another Writer

Throws:

java.io.IOException

See Also:

Writer

Method Detail

printf

public final void printf(java.lang.String fmt)
                  throws java.io.IOException

Prints a string to the output, without any formatting or parameter substitution (because there are no parameters)

Specified by:

printf in interface Printf

Throws:

java.io.IOException

printf

public final void printf(java.lang.String fmt,
                         double x)
                  throws java.io.IOException

Prints a double to the output with some formatting.

Specified by:

printf in interface Printf

Parameters:

fmt - The format string, like in C... should contain %f or something to that effect. Note that you don't do %lf, just %f.

x - The double to print.

Throws:

java.io.IOException

printf

public final void printf(java.lang.String fmt,
                         float x)
                  throws java.io.IOException

Prints a float to the output with some formatting.

Specified by:

printf in interface Printf

Parameters:

fmt - The format string, like in C... should contain %f or something to that effect.

x - The float to print.

Throws:

java.io.IOException

printf

public final void printf(java.lang.String fmt,
                         long x)
                  throws java.io.IOException

Prints a long to the output with some formatting.

Specified by:

printf in interface Printf

Parameters:

fmt - The format string, like in C... should contain %d or something to that effect. Note that you don't do %ld, just %d.

x - The long to print.

Throws:

java.io.IOException

printf

public final void printf(java.lang.String fmt,
                         int x)
                  throws java.io.IOException

Prints an integer to the output with some formatting.

Specified by:

printf in interface Printf

Parameters:

fmt - The format string, like in C... should contain %d or something to that effect.

x - The int to print.

Throws:

java.io.IOException

printf

public final void printf(java.lang.String fmt,
                         char x)
                  throws java.io.IOException

Prints an integer to the output with some formatting.

Specified by:

printf in interface Printf

Parameters:

fmt - The format string, like in C... should contain %c or something to that effect.

x - The char to print.

Throws:

java.io.IOException

printf

public final void printf(java.lang.String fmt,
                         java.lang.String x)
                  throws java.io.IOException

Prints a String to the output with some formatting.

Specified by:

printf in interface Printf

Parameters:

fmt - The format string, like in C... should contain %s or something to that effect. Note that unless you actually do some formatting (e.g., %-3s) it's ususally faster to use the + operator.

x - The String to print.

Throws:

java.io.IOException