poi/src/java/org/apache/poi/ss/usermodel/BuiltinFormats.java

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.ss.usermodel;

/**
 * Utility to identify built-in formats.  The following is a list of the formats as
 * returned by this class.<p>
 *<p>
 *       0, "General"<br>
 *       1, "0"<br>
 *       2, "0.00"<br>
 *       3, "#,##0"<br>
 *       4, "#,##0.00"<br>
 *       5, "$#,##0_);($#,##0)"<br>
 *       6, "$#,##0_);[Red]($#,##0)"<br>
 *       7, "$#,##0.00);($#,##0.00)"<br>
 *       8, "$#,##0.00_);[Red]($#,##0.00)"<br>
 *       9, "0%"<br>
 *       0xa, "0.00%"<br>
 *       0xb, "0.00E+00"<br>
 *       0xc, "# ?/?"<br>
 *       0xd, "# ??/??"<br>
 *       0xe, "m/d/yy"<br>
 *       0xf, "d-mmm-yy"<br>
 *       0x10, "d-mmm"<br>
 *       0x11, "mmm-yy"<br>
 *       0x12, "h:mm AM/PM"<br>
 *       0x13, "h:mm:ss AM/PM"<br>
 *       0x14, "h:mm"<br>
 *       0x15, "h:mm:ss"<br>
 *       0x16, "m/d/yy h:mm"<br>
 *<p>
 *       // 0x17 - 0x24 reserved for international and undocumented
 *       0x25, "#,##0_);(#,##0)"<br>
 *       0x26, "#,##0_);[Red](#,##0)"<br>
 *       0x27, "#,##0.00_);(#,##0.00)"<br>
 *       0x28, "#,##0.00_);[Red](#,##0.00)"<br>
 *       0x29, "_(* #,##0_);_(* (#,##0);_(* \"-\"_);_(@_)"<br>
 *       0x2a, "_($* #,##0_);_($* (#,##0);_($* \"-\"_);_(@_)"<br>
 *       0x2b, "_(* #,##0.00_);_(* (#,##0.00);_(* \"-\"??_);_(@_)"<br>
 *       0x2c, "_($* #,##0.00_);_($* (#,##0.00);_($* \"-\"??_);_(@_)"<br>
 *       0x2d, "mm:ss"<br>
 *       0x2e, "[h]:mm:ss"<br>
 *       0x2f, "mm:ss.0"<br>
 *       0x30, "##0.0E+0"<br>
 *       0x31, "@" - This is text format.<br>
 *       0x31  "text" - Alias for "@"<br>
 * <p>
 */
public final class BuiltinFormats {
	/**
	 * The first user-defined number format starts at 164.
	 */
	public static final int FIRST_USER_DEFINED_FORMAT_INDEX = 164;

	private final static String[] _formats = {
        "General",
        "0",
        "0.00",
        "#,##0",
        "#,##0.00",
        "\"$\"#,##0_);(\"$\"#,##0)",
        "\"$\"#,##0_);[Red](\"$\"#,##0)",
        "\"$\"#,##0.00_);(\"$\"#,##0.00)",
        "\"$\"#,##0.00_);[Red](\"$\"#,##0.00)",
        "0%",
        "0.00%",
        "0.00E+00",
        "# ?/?",
        "# ??/??",
        "m/d/yy",
        "d-mmm-yy",
        "d-mmm",
        "mmm-yy",
        "h:mm AM/PM",
        "h:mm:ss AM/PM",
        "h:mm",
        "h:mm:ss",
        "m/d/yy h:mm",

        // 0x17 - 0x24 reserved for international and undocumented
        // TODO - one junit relies on these values which seems incorrect
        "reserved-0x17",
        "reserved-0x18",
        "reserved-0x19",
        "reserved-0x1A",
        "reserved-0x1B",
        "reserved-0x1C",
        "reserved-0x1D",
        "reserved-0x1E",
        "reserved-0x1F",
        "reserved-0x20",
        "reserved-0x21",
        "reserved-0x22",
        "reserved-0x23",
        "reserved-0x24",
        
        "#,##0_);(#,##0)",
        "#,##0_);[Red](#,##0)",
        "#,##0.00_);(#,##0.00)",
        "#,##0.00_);[Red](#,##0.00)",
		"_(* #,##0_);_(* (#,##0);_(* \"-\"_);_(@_)",
        "_(\"$\"* #,##0_);_(\"$\"* (#,##0);_(\"$\"* \"-\"_);_(@_)",
        "_(* #,##0.00_);_(* (#,##0.00);_(* \"-\"??_);_(@_)",
        "_(\"$\"* #,##0.00_);_(\"$\"* (#,##0.00);_(\"$\"* \"-\"??_);_(@_)",
        "mm:ss",
        "[h]:mm:ss",
        "mm:ss.0",
        "##0.0E+0",
        "@"
	};

	/**
	 * @return array of built-in data formats
	 */
	public static String[] getAll() {
		return _formats.clone();
	}

	/**
	 * Get the format string that matches the given format index
	 *
	 * @param index of a built in format
	 * @return string represented at index of format or <code>null</code> if there is not a built-in format at that index
	 */
	public static String getBuiltinFormat(int index) {
		if (index < 0 || index >=_formats.length) {
			return null;
		}
		return _formats[index];
	}

	/**
	 * Get the format index that matches the given format string.<br>
	 * Automatically converts "text" to excel's format string to represent text.
	 * 
	 * @param pFmt string matching a built-in format
	 * @return index of format or -1 if undefined.
	 */
	public static int getBuiltinFormat(String pFmt) {
		String fmt = "TEXT".equalsIgnoreCase(pFmt) ? "@" : pFmt;

		int i = -1;
		for (String f : _formats) {
		    i++;
		    if (f.equals(fmt)) {
		        return i; 
		    }
		}
		
		return -1;
	}
}