LengthUnit(String value,
    short defaultType,
    float defaultValue) 
{
         
            lengthMapping.put("pt", new Float(1f));
            // Not sure about 1.3, determined by experiementation.
            lengthMapping.put("px", new Float(1.3f));
            lengthMapping.put("mm", new Float(2.83464f));
            lengthMapping.put("cm", new Float(28.3464f));
            lengthMapping.put("pc", new Float(12f));
            lengthMapping.put("in", new Float(72f));
            int res = 72;
            try {
                res = Toolkit.getDefaultToolkit().getScreenResolution();
            } catch (HeadlessException e) {
            }
            // mapping according to the CSS2 spec
            w3cLengthMapping.put("pt", new Float(res/72f));
            w3cLengthMapping.put("px", new Float(1f));
            w3cLengthMapping.put("mm", new Float(res/25.4f));
            w3cLengthMapping.put("cm", new Float(res/2.54f));
            w3cLengthMapping.put("pc", new Float(res/6f));
            w3cLengthMapping.put("in", new Float(res));
            parse(value, defaultType, defaultValue);
}

 float getValue(boolean w3cLengthUnits) 
{
            Hashtable mapping = (w3cLengthUnits) ? w3cLengthMapping : lengthMapping;
            float scale = 1;
            if (units != null) {
                Float scaleFloat = (Float)mapping.get(units);
                if (scaleFloat != null) {
                    scale = scaleFloat.floatValue();
                }
            }
            return this.value * scale;
}

 static float getValue(float value,
    String units,
    Boolean w3cLengthUnits) 
{
            Hashtable mapping = (w3cLengthUnits) ? w3cLengthMapping : lengthMapping;
            float scale = 1;
            if (units != null) {
                Float scaleFloat = (Float)mapping.get(units);
                if (scaleFloat != null) {
                    scale = scaleFloat.floatValue();
                }
            }
            return value * scale;
}

  void parse(String value,
    short defaultType,
    float defaultValue) 
{
            type = defaultType;
            this.value = defaultValue;
            int length = value.length();
            if (length  > 0 && value.charAt(length - 1) == '%") {
                try {
                    this.value = Float.valueOf(value.substring(0, length - 1)).
                                               floatValue() / 100.0f;
                    type = 1;
                }
                catch (NumberFormatException nfe) { }
            }
            if (length  >= 2) {
                units = value.substring(length - 2, length);
                Float scale = (Float)lengthMapping.get(units);
                if (scale != null) {
                    try {
                        this.value = Float.valueOf(value.substring(0,
                               length - 2)).floatValue();
                        type = 0;
                    }
                    catch (NumberFormatException nfe) { }
                }
                else if (units.equals("em") ||
                         units.equals("ex")) {
                    try {
                        this.value = Float.valueOf(value.substring(0,
                                      length - 2)).floatValue();
                        type = 3;
                    }
                    catch (NumberFormatException nfe) { }
                }
                else if (value.equals("larger")) {
                    this.value = 2f;
                    type = 2;
                }
                else if (value.equals("smaller")) {
                    this.value = -2;
                    type = 2;
                }
                else {
                    // treat like points.
                    try {
                        this.value = Float.valueOf(value).floatValue();
                        type = 0;
                    } catch (NumberFormatException nfe) {}
                }
            }
            else if (length  > 0) {
                // treat like points.
                try {
                    this.value = Float.valueOf(value).floatValue();
                    type = 0;
                } catch (NumberFormatException nfe) {}
            }
}

 public String toString() 
{
            return type + " " + value;
}