code: public static void print(final PrintStream out, final String name, final Percentile p) {
          if(p.isReady()) {
              try {
                  final StringBuilder sb = new StringBuilder(512);
                  final float[] q = p.getQuantiles();
                  final float[] e = p.getEstimates();
                  final int SCREENWIDTH = 80;
  
                  sb.append(name);
                  sb.append(", min(");
                  sb.append(p.getMin());
                  sb.append("), max(");
                  sb.append(p.getMax());
                  sb.append(')');
                  sb.append("\n");
  
                  final float max = e[e.length-1];
                  for(int i = 0; i<q.length; i++) {
                      sb.append(String.format("%4.3f", q[i]));
                      sb.append(": ");
                      final int len = (int) (e[i]/max*SCREENWIDTH);
                      for(int j = 0; j<len; j++) {
                          sb.append('#');
                      }
                      sb.append(" ");
                      sb.append(String.format("%4.3f\n", e[i]));
                  }
  
                  out.println(sb.toString());
              } catch(InsufficientSamplesException e) {
                  // this can never occur
              }
          }
      }
docs: print a nice histogram of percentiles
  
  @param out - output stream
  @param name - data set name
  @param p - percentile