java.util.Formatter#toString ( )源码实例Demo

private static String formatEntry(OLogEntryDescription entry) {
  StringBuilder sb = new StringBuilder();
  Formatter formatter = new Formatter(sb, Locale.US);

  formatter.format(" [term: %" + LONG_DIGITS + "d]", entry.getElectionTerm());
  formatter.format(" [seq: %" + LONG_DIGITS + "d]", entry.getSeqNum());

  formatContent(formatter, entry);

  if (!entry.isHeaderCrcValid()) {
    formatter.format(" <invalid header CRC>");
  }

  if (!entry.isContentCrcValid()) {
    formatter.format(" <invalid content CRC>");
  }

  return formatter.toString();
}
 

public static String SHA1(InputStream is) {
    try {
        MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
        final byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        for (int read; (read = is.read(buffer)) != -1; ) {
            messageDigest.update(buffer, 0, read);
        }

        Formatter formatter = new Formatter();
        // Convert the byte to hex format
        for (final byte b : messageDigest.digest()) {
            formatter.format("%02x", b);
        }
        return formatter.toString();
    } catch (NoSuchAlgorithmException | IOException e) {
        android.util.Log.e(TAG,e.getMessage());
    } finally {
        YTutils.close(is);
    }
    return null;
}
 

void writeHeader(PointFeature pf) throws IOException {
  List<VariableSimpleIF> coords = new ArrayList<>();
  coords.add(VariableSimpleBuilder.makeScalar(timeName, "time of measurement", timeUnit.getUdUnit(), DataType.DOUBLE)
      .addAttribute(CF.CALENDAR, timeUnit.getCalendar().toString()).build());

  coords.add(
      VariableSimpleBuilder.makeScalar(latName, "latitude of measurement", CDM.LAT_UNITS, DataType.DOUBLE).build());
  coords.add(
      VariableSimpleBuilder.makeScalar(lonName, "longitude of measurement", CDM.LON_UNITS, DataType.DOUBLE).build());
  Formatter coordNames = new Formatter().format("%s %s %s", timeName, latName, lonName);
  if (altUnits != null) {
    coords.add(VariableSimpleBuilder.makeScalar(altName, "altitude of measurement", altUnits, DataType.DOUBLE)
        .addAttribute(CF.POSITIVE, CF1Convention.getZisPositive(altName, altUnits)).build());
    coordNames.format(" %s", altName);
  }

  super.writeHeader(coords, null, null, pf.getDataAll(), coordNames.toString());
}
 

@Override
public String toString() {
    // Output into coordinate format. Indices start from 1 instead of 0
    Formatter out = new Formatter();

    out.format("%10d %19d\n", size, Matrices.cardinality(this));

    int i = 0;
    for (VectorEntry e : this) {
        if (e.get() != 0)
            out.format("%10d % .12e\n", e.index() + 1, e.get());
        if (++i == 100) {
            out.format("...\n");
            break;
        }
    }

    return out.toString();
}
 

/**
 * Generates a label for the specified data item.
 * 
 * @param dataset  the dataset ({@code null} not permitted).
 * @param seriesKey  the series key ({@code null} not permitted).
 * 
 * @return The series label (possibly {@code null}). 
 */
@Override @SuppressWarnings("unchecked")
public String generateItemLabel(XYZDataset dataset, 
        Comparable<?> seriesKey, int itemIndex) {
    Args.nullNotPermitted(dataset, "dataset");
    Args.nullNotPermitted(seriesKey, "seriesKey");
    if (this.itemSelection != null) {
        XYZItemKey key = new XYZItemKey(seriesKey, itemIndex);
        if (!this.itemSelection.isSelected(key)) {
            return null;
        }
    }
    int seriesIndex = dataset.getSeriesIndex(seriesKey);
    Formatter formatter = new Formatter(new StringBuilder());
    double x = dataset.getX(seriesIndex, itemIndex);
    double y = dataset.getY(seriesIndex, itemIndex);
    double z = dataset.getZ(seriesIndex, itemIndex);
    formatter.format(this.template, seriesKey, x, y, z);
    String result = formatter.toString();
    formatter.close();
    return result;
}
 

/**
 * Publishes a value on MQTT. A command topic needs to be set in the configuration.
 *
 * @param command The command to send
 * @return A future that completes with true if the publishing worked and false and/or exceptionally otherwise.
 */
public CompletableFuture<@Nullable Void> publishValue(Command command) {
    cachedValue.update(command);

    String mqttCommandValue = cachedValue.getMQTTpublishValue();

    final MqttBrokerConnection connection = this.connection;

    if (!readOnly && connection != null) {
        // Formatter: Applied before the channel state value is published to the MQTT broker.
        if (config.formatBeforePublish.length() > 0) {
            try (Formatter formatter = new Formatter()) {
                Formatter format = formatter.format(config.formatBeforePublish, mqttCommandValue);
                mqttCommandValue = format.toString();
            } catch (IllegalFormatException e) {
                logger.debug("Format pattern incorrect for {}", channelUID, e);
            }
        }
        // Outgoing transformations
        for (ChannelStateTransformation t : transformationsOut) {
            mqttCommandValue = t.processValue(mqttCommandValue);
        }
        // Send retained messages if this is a stateful channel
        return connection.publish(config.commandTopic, mqttCommandValue.getBytes(), 1, config.retained)
                .thenRun(() -> {
                });
    } else {
        CompletableFuture<@Nullable Void> f = new CompletableFuture<>();
        f.completeExceptionally(new IllegalStateException("No connection or readOnly channel!"));
        return f;
    }
}
 

/**
 *
 */
public void setDataset(NetcdfDataset newds) {
  if (newds == null) {
    return;
  }
  try {
    if (ds != null) {
      ds.close();
    }
  } catch (IOException ioe) {
    logger.warn("close failed");
  }

  Formatter parseInfo = new Formatter();
  this.ds = newds;
  try {
    sgTable.setDataset(newds, parseInfo);
  } catch (IOException e) {
    String info = parseInfo.toString();
    if (!info.isEmpty()) {
      detailTA.setText(info);
      detailWindow.show();
    }
    e.printStackTrace();
    return;
  }
  setSelectedItem(newds.getLocation());
}
 

@Override
public String toString(Object o, String formatString, Locale locale) {
    // o will be instanceof Number
    if ( formatString==null ) return o.toString();
    Formatter f = new Formatter(locale);
    f.format(formatString, o);
    return f.toString();
}
 

public static String toHex(final byte[] bytes) {
	Formatter formatter = new Formatter();
	for (byte b : bytes) {
		formatter.format("%02x", b);
	}
	String result = formatter.toString();
	formatter.close();
	return result;
}
 

private static String byteArray2Hex(final byte[] hash) {
    Formatter formatter = new Formatter();
    try {
        for (byte b : hash) {
            formatter.format("%02x", b);
        }
        return formatter.toString();
    } finally {
        formatter.close();
    }
}
 

String getDatasetInfo() {
  if (null == gridDataset)
    return "";
  Formatter info = new Formatter();
  gridDataset.getDetailInfo(info);
  return info.toString();
}
 

public String runClassifier() {
  Formatter ff = new Formatter();
  String type = null;
  try (NetcdfDataset ds = NetcdfDatasets.openDataset(f.getPath())) {
    type = DtCoverageCSBuilder.describe(ds, ff);

  } catch (IOException e) {
    StringWriter sw = new StringWriter(10000);
    e.printStackTrace(new PrintWriter(sw));
    ff.format("%n%s", sw.toString());
  }
  ff.format("CoverageCS.Type = %s", type);
  return ff.toString();
}
 

/** Print StructureData to returned String. */
public static String printStructureData(StructureData sdata) {
  Formatter out = new Formatter();
  for (StructureMembers.Member m : sdata.getMembers()) {
    Array memData = sdata.getArray(m);
    if (memData instanceof ArrayChar) {
      out.format("%s", ((ArrayChar) memData).getString());
    } else {
      printArray(out, memData, null, null, new Indent(2), null, true);
    }
    out.format(",");
  }
  return out.toString();
}
 

private static String byteArray2Hex(final byte[] hash) {
	Formatter formatter = new Formatter();
	for (byte b : hash) {
		formatter.format("%02x", b);
	}
	return formatter.toString();
}
 

private void checkBetAmount(BigDecimal betAmount) {
  if (BigDecimal.ZERO.compareTo(betAmount) >= 0) {
    Formatter formatter = new Formatter(Locale.US).format(
        "Invalid bet amount <%.2f>. Please place a bet of more than 0",
        betAmount
    );
    throw new IllegalArgumentException(formatter.toString());
  }
}
 

Row(GridDatatype gg) {
  this.gg = gg;
  Formatter f = new Formatter();
  for (Dimension dim : gg.getDimensions())
    f.format("%s ", dim.getShortName());
  dims = f.toString();
}
 

private String wordProbToString(double[] prob) {
    Formatter formatter = new Formatter();
    for(int j=0;j<prob.length;++j) {
        double p = prob[j];
        if (p>=0.00001) {
            formatter.format(" %s:%.5f", langlist.get(j), p);
        }
    }
    formatter.close();
    return formatter.toString();
}
 

private static void doit(String spec, String filterExpect) {
  Formatter errlog = new Formatter();
  CollectionSpecParser specp = new CollectionSpecParser(spec, errlog);
  System.out.printf("spec= %s%n%s%n", spec, specp);
  String err = errlog.toString();
  System.out.printf("-----------------------------------%n");
  String filterHave = (specp.getFilter() != null) ? specp.getFilter().toString() : "null";
  assertThat(filterHave).isEqualTo(filterExpect);
}
 

private String getDecl(Variable ve) {
  Formatter sb = new Formatter();
  sb.format("%s ", ve.getDataType().toString());
  ve.getNameAndDimensions(sb, true, true);
  return sb.toString();
}
 

/**
 * Print a section of the data of the given Variable.
 *
 * @param v variable to print
 * @param sectionSpec string specification
 * @param ct allow task to be cancelled; may be null.
 * @return String result formatted data ouptut
 * @throws IOException on write error
 * @throws InvalidRangeException is specified section doesnt match variable shape
 */
private static String printVariableDataSection(Variable v, String sectionSpec, CancelTask ct)
    throws IOException, InvalidRangeException {
  Array data = v.read(sectionSpec);

  Formatter out = new Formatter();
  printArray(out, data, v.getFullName(), new Indent(2), ct);
  return out.toString();
}