Fmt - format text (like Berkeley UNIX fmt)

        
/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

/**
 * Fmt - format text (like Berkeley UNIX fmt).
 */
public class Fmt {
  /** The maximum column width */
  public static final int COLWIDTH = 72;

  /** The file that we read and format */
  BufferedReader in;

  /** If files present, format each, else format the standard input. */
  public static void main(String[] av) throws IOException {
    if (av.length == 0)
      new Fmt(System.in).format();
    else
      for (int i = 0; i < av.length; i++)
        new Fmt(av[i]).format();
  }

  /** Construct a Formatter given a filename */
  public Fmt(String fname) throws IOException {
    in = new BufferedReader(new FileReader(fname));
  }

  /** Construct a Formatter given an open Stream */
  public Fmt(InputStream file) throws IOException {
    in = new BufferedReader(new InputStreamReader(file));
  }

  /** Format the File contained in a constructed Fmt object */
  public void format() throws IOException {
    String w, f;
    int col = 0;
    while ((w = in.readLine()) != null) {
      if (w.length() == 0) { // null line
        System.out.print("\n"); // end current line
        if (col > 0) {
          System.out.print("\n"); // output blank line
          col = 0;
        }
        continue;
      }

      // otherwise it's text, so format it.
      StringTokenizer st = new StringTokenizer(w);
      while (st.hasMoreTokens()) {
        f = st.nextToken();

        if (col + f.length() > COLWIDTH) {
          System.out.print("\n");
          col = 0;
        }
        System.out.print(f + " ");
        col += f.length() + 1;
      }
    }
    if (col > 0)
      System.out.print("\n");
    in.close();
  }
}

Related examples in the same category

1.	Demonstrate some usage patterns and format-code examples of the Formatter
2.	String.format(): right pad a string
3.	String.format(): left pad a string
4.	Format a String (JDK1.5)
5.	Pass value array to String.format()
6.	Format Calendar with String.format()
7.	Abbreviates a String using ellipses in both sides.
8.	Abbreviates a String using ellipses.
9.	Abbreviate string
10.	Word Wrap
11.	Centers a String in a larger String of size size using the space character (' ').
12.	Centers a String in a larger String of size size. Uses a supplied String as the value to pad the String with.
13.	Centers a String in a larger String of size size. Uses a supplied character as the value to pad the String with.
14.	Capitalize the first character of the given string
15.	Capitalize the first letter but leave the rest as they are.
16.	Capitalizes a String changing the first letter to title case as Character.toTitleCase(char). No other letters are changed.
17.	Format strings into table
18.	Center the contents of the string.
19.	Truncate the supplied string to be no more than the specified length.
20.	Replace, remove, format strings
21.	Adds spaces in suitable locations of the input string
22.	Blank string: empty or white space
23.	Capital and uncapital strings
24.	Capitalizes the first character of the given string
25.	Utilities for String formatting, manipulation, and queries
26.	Fast lower case conversion
27.	Format a percentage for presentation to the user
28.	Left justify the contents of the string, ensuring that the supplied string begins at the first character and that the resulting string is of the desired length.
29.	Transforms words to singular, plural, humanized (human readable), underscore, camel case, or ordinal form
30.	Escapes all necessary characters in the String so that it can be used in SQL
31.	Escapes all necessary characters in the String so that it can be used in an XML doc
32.	Adds zeros to the beginning of a value so that the total length matches the given precision, otherwise trims the right digits.
33.	Right justify string, ensuring that the string ends at the last character
34.	Makes the first letter caps and the rest lowercase.
35.	Quote a string so that it can be used as an identifier or a string literal in SQL statements.
36.	Remove the hyphens from the begining of str and return the new String.
37.	Swaps the case of a String changing upper and title case to lower case, and lower case to upper case.
38.	Uncapitalizes a String changing the first letter to title case as per Character.toLowerCase(char). No other letters are changed.
39.	Capitlize each word in a string (journal titles, etc)
40.	Uncapitalize String
41.	Utility inserts a space before every caps in a string
42.	convert String array To Comma Delimited
43.	Constructs a method name from element's bean name for a given prefix
44.	break Lines
45.	Limit the string to a certain number of characters, adding "..." if it was truncated
46.	Capicalizes the first letter of a string
47.	Add delimiters to a string.
48.	Get Truncated String
49.	Convert to $(Dollars) string
50.	Convert string to multiline
51.	Deletes all whitespace from a String.
52.	Trim string from left or right
53.	implode and explode string
54.	To Upper Case First Char
55.	Left trim and right trim
56.	capitalize and uncapitalize

Fmt - format text (like Berkeley UNIX fmt) : String format « Data Type « Java

Related examples in the same category