Strings.java Source code

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Here is the source code for Strings.java

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/*
 * LingPipe v. 3.9
 * Copyright (C) 2003-2010 Alias-i
 *
 * This program is licensed under the Alias-i Royalty Free License
 * Version 1 WITHOUT ANY WARRANTY, without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the Alias-i
 * Royalty Free License Version 1 for more details.
 *
 * You should have received a copy of the Alias-i Royalty Free License
 * Version 1 along with this program; if not, visit
 * http://alias-i.com/lingpipe/licenses/lingpipe-license-1.txt or contact
 * Alias-i, Inc. at 181 North 11th Street, Suite 401, Brooklyn, NY 11211,
 * +1 (718) 290-9170.
 */

//package com.aliasi.util;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import java.text.DecimalFormat;

/**
 * Static utility methods for processing strings, characters and
 * string buffers.
 *
 * @author  Bob Carpenter
 * @version 4.0.1
 * @since   LingPipe1.0
 * @see     java.lang.Character
 * @see     java.lang.String
 * @see     java.lang.StringBuilder
 */
public class Strings {

    /**
     * Return a displayable version of the character sequence,
     * followed by integer positions at various powers of 10.
     * For instance, for the input string \code{John ran home.}, the
     * output is
     *
     * <blockquote><pre>
     * John ran home.
     * 01234567890123
     * 0         1
     * </pre></blockquote>
     *
     * This allows easy access to the index of positions in the
     * string.
     *
     * @param in Input sequence to annotate.
     * @return The input sequence followed by indexing positions.
     */
    public static String textPositions(CharSequence in) {
        StringBuilder sb = new StringBuilder();
        sb.append(in);
        for (int base = 1; base <= in.length(); base *= 10) {
            sb.append('\n');
            for (int i = 0; i < in.length(); ++i)
                sb.append(i % base == 0 ? Integer.toString((i / base) % 10) : " ");
        }
        return sb.toString();
    }

}