Formtieren von Zahlen in 'alten' Java-Stil

/**
 * 
 */
package de.tutorials;

import java.text.DecimalFormat;

/**
 * @author thomas.darimont
 * 
 */
public class NumberFormatExample {

    /**
     * @param args
     */
    public static void main(String[] args) {
        long a = -223897000;
        double b = Math.PI * 1000000000;
        double c = 0.021;

        System.out.println(DecimalFormatHelper.DEFAULT.alignRight(a, String
                .valueOf(a).length()));
        System.out.println(DecimalFormatHelper.DEFAULT.alignRight(b, String
                .valueOf(a).length()));
        System.out.println(DecimalFormatHelper.DEFAULT.alignRight(c, String
                .valueOf(a).length()));
    }

    static class DecimalFormatHelper {
        private final static String SPACES = "                                                                                                    ";

        DecimalFormat decimalFormat;

        final public static DecimalFormatHelper DEFAULT = new DecimalFormatHelper(
                new DecimalFormat("0.000"));

        private DecimalFormatHelper(DecimalFormat decimalFormat) {
            this.decimalFormat = decimalFormat;
        }

        public String alignRight(double number, int maximumIntegerDigits) {
            String string = decimalFormat.format(number);
            int spacesToAdd = maximumIntegerDigits - string.length()
                    + decimalFormat.getMaximumFractionDigits() + 1;
            return SPACES.substring(0, spacesToAdd) + string;
        }
    }
}