Examples of java.text.DecimalFormat.applyPattern()

java.text.DecimalFormat.applyPattern()
Apply the given pattern to this Format object. A pattern is a short-hand specification for the various formatting properties. These properties can also be changed individually through the various setter methods.
There is no limit to integer digits set by this routine, since that is the typical end-user desire; use setMaximumInteger if you want to set a real value. For negative numbers, use a second pattern, separated by a semicolon
Example "#,#00.0#" -> 1,234.56
This means a minimum of 2 integer digits, 1 fraction digit, and a maximum of 2 fraction digits.
Example: "#,#00.0#;(#,#00.0#)" for negatives in parentheses.
In negative patterns, the minimum and maximum counts are ignored; these are presumed to be set in the positive pattern. @exception NullPointerException if pattern is null @exception IllegalArgumentException if the given pattern is invalid.

  public static String formatNumberCN(String number, String formatStr) {
    if(number==null || number.length()<1){
      return "";
    }
    DecimalFormat df = (DecimalFormat) DecimalFormat.getInstance(Locale.CHINA);
    df.applyPattern(formatStr);
    String numberStr = df.format(Double.parseDouble(number));
    return numberStr;
  }


  /**

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   * @param number 被格式化的数字
   * @return 返回格式化后的数字的对应的字符串
   */
  public static String formatNumberCN(double number) {
    DecimalFormat df = (DecimalFormat) DecimalFormat.getInstance(Locale.CHINA);
    df.applyPattern(NUMBER_IN_2_0);
    return df.format(number);
  }


  /**
   * 将给定的一个数字字符串按中国的习惯和按始终显示两位小数，整数部分超过3位时不用","分开的格式格式化

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  public static String formatNumberCN(String number) {
    if(number==null || number.length()<1){
      return "";
    }
    DecimalFormat df = (DecimalFormat) DecimalFormat.getInstance(Locale.CHINA);
    df.applyPattern(NUMBER_IN_2_0);
    return df.format(Double.parseDouble(number));
  }


  /**
   *将给定的一个数字按指定的国家的风格和指定的格式来格式化它，并返回一个该数字对应的字符串

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    protected String FormatNumber(double d) {
      DecimalFormat nf = new DecimalFormat();
      String ret;
      // If module of number is greater than 1e4 or lesser than 1e-4 uses exponential notation
      if (Math.abs(d) >= 1e-4 && Math.abs(d) <= 1e4 || d == 0) {
        nf.applyPattern("#.####");
        ret = nf.format(d);
        if (ret.length() > 7) {
          ret = ret.substring(0, 6);
        }
      } else {

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        ret = nf.format(d);
        if (ret.length() > 7) {
          ret = ret.substring(0, 6);
        }
      } else {
        nf.applyPattern("0.00E00");
        ret = nf.format(d);
      }
      return ret;
    }

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            ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage();


    format = NumberFormat.getIntegerInstance();
    if (format instanceof DecimalFormat) {
      DecimalFormat decf = (DecimalFormat)format;
      decf.applyPattern(decf.toPattern()+" KB");
    }
    stats.add(new StatRecord(getName(), "Max Heap mem", "long", 
            format.format(heap.getMax()/1024), Level.INFO));
    stats.add(new StatRecord(getName(), "Used Heap", "long", 
            format.format(heap.getUsed()/1024), Level.INFO));

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  public void check1Min(Queue<Packet> results) {
    for (File file : roots) {
      NumberFormat format = NumberFormat.getIntegerInstance();
      if (format instanceof DecimalFormat) {
        DecimalFormat decf = (DecimalFormat) format;
        decf.applyPattern(decf.toPattern() + " KB");
      }
      NumberFormat formp = NumberFormat.getPercentInstance();
      formp.setMaximumFractionDigits(2);
      double percent = new Long(file.getUsableSpace()).doubleValue() /
              new Long(file.getTotalSpace()).doubleValue();

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    if (note.getType().equals(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED)) {
      log.info("Usage threshold exceeded, sending notification.");
      NumberFormat format = NumberFormat.getIntegerInstance();
      if (format instanceof DecimalFormat) {
        DecimalFormat decf = (DecimalFormat) format;
        decf.applyPattern(decf.toPattern() + " KB");
      }
      MemoryPoolMXBean memoryPoolMXBean = (MemoryPoolMXBean) handback;
      String message = "Threshold " +
              format.format(memoryPoolMXBean.getUsageThreshold() / 1024) +
              " for memory pool: " + memoryPoolMXBean.getName() +

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  public String getState() {
    NumberFormat format = NumberFormat.getIntegerInstance();
    if (format instanceof DecimalFormat) {
      DecimalFormat decf = (DecimalFormat) format;
      decf.applyPattern(decf.toPattern() + " KB");
    }
    NumberFormat formp = NumberFormat.getPercentInstance();
    formp.setMaximumFractionDigits(2);
    StringBuilder sb = new StringBuilder();
    List<MemoryPoolMXBean> memPools = ManagementFactory.getMemoryPoolMXBeans();

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        if (patternKey != null) {
            String pattern =
                ResourceService.getService().getLocalizedFormat(StringTable,
                    patternKey,
                    locale);
            fmt.applyPattern(pattern);
        }


        formatCache.put(locale, fmt);


        return fmt;

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