Language Java Nosugar Comms Code Hex.java

// 
//	Hex class
//	part of the set of documents known as Java no sugar.
//	Copyright (c) 1996 Sunil Gupta, sunil@magnetic.demon.co.uk
//	placed into the public domain by the author
//
public class Hex extends Object
{
	private static final String hexCodes = "0123456789abcdef";
	private static final String hexPrefix = "0x";
	
	public static String toHex(long value)
	{
		long remainder;
		byte digit;
		String answer = "";
		
		remainder = value;
		while (remainder > 0)
		{
			digit = (byte) (remainder & 0xFl);
			answer = hexCodes.charAt(digit) + answer;
			remainder >>= 4;
		}
		
		return (hexPrefix + answer);
		
	}
	
	public static String toHex(int value)		{ return toHex((long) value); }
	public static String toHex(short value)	{ return toHex((long) value); }
	public static String toHex(byte value)	{ return toHex((long) value); }
	
	//#############################################################################
	// testing
	//#############################################################################
	public static void main( String argv[])
	{
		String result;
		
		result = toHex(0x1234567812345678l);
		if ( result.equals("0x1234567812345678") )
			System.out.println("Hex conversion worked just fine");
		else
			System.out.println(
				"Hex conversion is b*******d" +
				"\n\tExpected: 0x1234567812345678" +
				"\n\t     Got: " + result);
	}
}

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