Examples of java.util.Calendar.clear()

java.util.Calendar.clear()
Sets the given calendar field value and the time value (millisecond offset from the Epoch) of this Calendar undefined. This means that {@link #isSet(int) isSet(field)} will return false, andthe date and time calculations will treat the field as if it had never been set. A Calendar implementation class may use the field's specific default value for date and time calculations.
The {@link #HOUR_OF_DAY}, {@link #HOUR} and {@link #AM_PM}fields are handled independently and the the resolution rule for the time of day is applied. Clearing one of the fields doesn't reset the hour of day value of this Calendar. Use {@link #set(int,int) set(Calendar.HOUR_OF_DAY, 0)} to reset the hourvalue. @param field the calendar field to be cleared. @see #clear()

    for (i = 0; i < numBatches; i++) {
      Transaction txn = channel.getTransaction();
      txn.begin();
      for (j = 1; j <= batchSize; j++) {
        Event event = new SimpleEvent();
        eventDate.clear();
        eventDate.set(2011, i, i, i, 0); // yy mm dd
        event.getHeaders().put("timestamp",
            String.valueOf(eventDate.getTimeInMillis()));
        event.getHeaders().put("hostname", "Host" + i);
        event.getHeaders().put("slow", "1500");

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    for (i = 0; i < numBatches; i++) {
      Transaction txn = channel.getTransaction();
      txn.begin();
      for (j = 1; j <= batchSize; j++) {
        Event event = new SimpleEvent();
        eventDate.clear();
        eventDate.set(2011, i, i, i, 0); // yy mm dd
        event.getHeaders().put("timestamp",
            String.valueOf(eventDate.getTimeInMillis()));
        event.getHeaders().put("hostname", "Host" + i);
        event.getHeaders().put("slow", "1500");

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        final   int endindex = (start+length)-1;


        try
        {
            if (length < 16) throw new ParseException("Value is too short.",0);
            cal.clear();
            cal.setLenient(false);
//     If there's a leading sign, set the appropriate Era.
            if (value[i]=='-'||value[i]=='+')
            {
                cal.set(Calendar.ERA, (value[i]=='-'?GregorianCalendar.BC:GregorianCalendar.AD));

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        final   int endindex = (start+length)-1;


        try
        {
            if (length < 16) throw new ParseException("Value is too short.",0);
            cal.clear();
            cal.setLenient(false);
//  If there's a leading sign, set the appropriate Era.
            if (value[i]=='-'||value[i]=='+')
            {
                cal.set(Calendar.ERA, (value[i]=='-'?GregorianCalendar.BC:GregorianCalendar.AD));

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     * @deprecated since ISO8601DateFormat is deprecated
     */
  public void testISO8601Format() {
      DateFormat format = new ISO8601DateFormat();
      Calendar calendar = Calendar.getInstance();
      calendar.clear();
      calendar.set(1970, 0, 1, 0, 0, 0);
      String actual = format.format(calendar.getTime());
      assertEquals("1970-01-01 00:00:00,000", actual);
  }

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     * @deprecated since DateTimeDateFormat is deprecated
     */
  public void testDateTimeFormat() {
      DateFormat format = new DateTimeDateFormat();
      Calendar calendar = Calendar.getInstance();
      calendar.clear();
      calendar.set(1970, 0, 1, 0, 0, 0);
      String actual = format.format(calendar.getTime());
      SimpleDateFormat df = new SimpleDateFormat("dd MMM yyyy HH:mm:ss,SSS");
      String expected = df.format(calendar.getTime());
      assertEquals(expected, actual);

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    int [] M31 = {0,2,4,6,7,9,11};


    for(int i = 0; i < M31.length; i ++) {
      for(int d = 1; d <=31; d++) {
    for(int h = 0; h < 23; h++) {
      c.clear();
      c.set(Calendar.YEAR, 20);
      c.set(Calendar.MONTH, Calendar.JANUARY + M31[i]);
      c.set(Calendar.DAY_OF_MONTH, d);
      c.set(Calendar.HOUR_OF_DAY, h);
      c.set(Calendar.MINUTE, 10);

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    for(int i = 0; i < M31.length; i ++) {
      System.out.println("Month = "+(M31[i]+1));
      for(int d = 1; d <= 31; d++) {
    for(int h = 0; h < 23; h++) {
      for(int m = 0; m <= 59; m++) {
        c.clear();
        c.set(Calendar.YEAR, 20);
        c.set(Calendar.MONTH, Calendar.JANUARY + M31[i]);
        c.set(Calendar.DAY_OF_MONTH, d);
        c.set(Calendar.HOUR_OF_DAY, h);
        c.set(Calendar.MINUTE, m);

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      System.out.println("Month = "+(M31[i]+1));
      for(int d = 1; d <= 31; d++) {
    for(int h = 0; h < 23; h++) {
      for(int m = 0; m < M.length; m++) {
        for(int s = 0; s < S.length; s++) {
          c.clear();
          c.set(Calendar.YEAR, 20);
          c.set(Calendar.MONTH, Calendar.JANUARY + M31[i]);
          c.set(Calendar.DAY_OF_MONTH, d);
          c.set(Calendar.HOUR_OF_DAY, h);
          c.set(Calendar.MINUTE, M[m]);

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        /* Default GregorianCalendar initializes to current time.
         * Make sure we clear that out before returning, per the
         * contract of this method.
         */
        Calendar result = new java.util.GregorianCalendar();
        result.clear();
        return result;
    }


    // *********************************************************
    // ******* CROSS input converters (class -> byte[]) ********

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