cdm/src/main/java/ucar/unidata/util/Format.java
public static String l(long v, int width) {
    return pad(Long.toString(v), width, true);
  }
public static String l(long v, int width) {
    return pad(Long.toString(v), width, true);
  }
Format a long value.

@param v     : value
@param width pad to this width
@return formatted string