Adds zeros to the beginning of a value so that the total length matches the given precision, otherwise trims the right digits.

       
   
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/** Provides a collection of convenience methods for processing and
 * creating objects with <code>String</code> value components.
 *
 * @author Campbell Boucher-Burnett (boucherb@users dot sourceforge.net)
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @author Nitin Chauhan
 * @version 1.9.0
 * @since 1.7.0
 */
public class Main {


  /**
   * If necessary, adds zeros to the beginning of a value so that the total
   * length matches the given precision, otherwise trims the right digits.
   * Then if maxSize is smaller than precision, trims the right digits to
   * maxSize. Negative values are treated as positive
   */
  public static String toZeroPaddedString(long value, int precision,
          int maxSize) {

      StringBuffer sb = new StringBuffer();

      if (value < 0) {
          value = -value;
      }

      String s = Long.toString(value);

      if (s.length() > precision) {
          s = s.substring(precision);
      }

      for (int i = s.length(); i < precision; i++) {
          sb.append('0');
      }

      sb.append(s);

      if (maxSize < precision) {
          sb.setLength(maxSize);
      }

      return sb.toString();
  }

}

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Adds zeros to the beginning of a value so that the total length matches the given precision, otherwise trims the right digits. : String format « Data Type « Java

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