Example usage for java.util Calendar add

Introduction

In this page you can find the example usage for java.util Calendar add.

Prototype

public abstract void add(int field, int amount);

Source Link

Document

Adds or subtracts the specified amount of time to the given calendar field, based on the calendar's rules.

Usage

From source file:Main.java

public static int getMonthDayNumber(int offset) {
    Calendar calendar = Calendar.getInstance();
    if (offset != 0)
        calendar.add(Calendar.MONTH, offset);
    return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
}

From source file:Main.java

private static String formatPeriodDate(int daysPeriod) {
    Calendar now = Calendar.getInstance();
    Calendar period = Calendar.getInstance();
    period.add(Calendar.DAY_OF_MONTH, daysPeriod);
    SimpleDateFormat sdf = new SimpleDateFormat("MMMM", Locale.US);

    if (now.get(Calendar.YEAR) == period.get(Calendar.YEAR)) {
        if (now.get(Calendar.MONTH) == period.get(Calendar.MONTH)) {
            return period.get(Calendar.DAY_OF_MONTH) + "-" + now.get(Calendar.DAY_OF_MONTH) + " "
                    + sdf.format(now.getTime()) + ", " + now.get(Calendar.YEAR);
        }//from   ww w .  j  a v a2s . c  o  m
        return period.get(Calendar.DAY_OF_MONTH) + " " + sdf.format(period.getTime()) + " - "
                + now.get(Calendar.DAY_OF_MONTH) + " " + sdf.format(now.getTime()) + ", "
                + now.get(Calendar.YEAR);
    }
    return period.get(Calendar.DAY_OF_MONTH) + " " + sdf.format(period.getTime()) + " "
            + period.get(Calendar.YEAR) + " - " + now.get(Calendar.DAY_OF_MONTH) + " "
            + sdf.format(now.getTime()) + " " + now.get(Calendar.YEAR);
}

From source file:Main.java

@SuppressLint("NewApi")
public static KeyPair generateRsaPairWithGenerator(Context ctx, String alais)
        throws InvalidAlgorithmParameterException, NoSuchProviderException, NoSuchAlgorithmException {
    Calendar notBefore = Calendar.getInstance();
    Calendar notAfter = Calendar.getInstance();
    notAfter.add(1, Calendar.YEAR);
    KeyPairGeneratorSpec spec = new KeyPairGeneratorSpec.Builder(ctx).setAlias(alais)
            .setSubject(new X500Principal(String.format("CN=%s, OU=%s", alais, ctx.getPackageName())))
            .setSerialNumber(BigInteger.ONE).setStartDate(notBefore.getTime()).setEndDate(notAfter.getTime())
            .build();/* w w w  .  j ava2  s .c o  m*/

    KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("RSA", "AndroidKeyStore");
    kpGenerator.initialize(spec);
    KeyPair kp = kpGenerator.generateKeyPair();

    return kp;
}

From source file:Main.java

public static String getYesterdayFormattedTime() {

    Calendar calendar = getCurrentCalendar();
    calendar.add(Calendar.HOUR_OF_DAY, -9);
    calendar.add(Calendar.DAY_OF_MONTH, -1);
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz");
    String result = format.format(calendar.getTime());
    String standardName = "";
    if (result.contains("JST")) {
        standardName = "JST";
        result = result.replaceAll(standardName, "+09:00");
    } else if (result.contains("GMT")) {
        standardName = "GMT";
        result = result.replaceAll(standardName, "");
    }// ww w. j  a v  a  2s  .c om
    return result;
}

From source file:Main.java

private static Date getDistanceDate(Date date, int day) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);/*from  ww w.  j a  v a 2  s. c  o m*/
    cal.add(Calendar.DATE, day);
    return cal.getTime();
}

From source file:Main.java

public static String getCurrentDateByOffset(String format, int calendarField, int offset) {
    String mDateTime = null;/*w ww.j  av a2  s.  c o  m*/
    try {
        SimpleDateFormat mSimpleDateFormat = new SimpleDateFormat(format);
        Calendar c = new GregorianCalendar();
        c.add(calendarField, offset);
        mDateTime = mSimpleDateFormat.format(c.getTime());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return mDateTime;

}

From source file:Main.java

public static int getUpMonthDays(Date date) {
    Calendar c = Calendar.getInstance();
    c.setTime(date);/*from www .ja  v  a2s .c  o m*/
    c.add(Calendar.MONTH, -1);
    return c.getActualMaximum(Calendar.DAY_OF_MONTH);
}

From source file:Main.java

public static Date add(Date date, int field, int amount) {
    Calendar c = Calendar.getInstance();
    c.setTime(date);/*from w  w  w .  j  av a  2s. co m*/
    c.add(field, amount);
    return c.getTime();
}

From source file:Main.java

public static int getNextMonthDays(Date date) {
    Calendar c = Calendar.getInstance();
    c.setTime(date);//from   ww w .j a va  2s .c o m
    c.add(Calendar.MONTH, 1);
    return c.getActualMaximum(Calendar.DAY_OF_MONTH);
}

From source file:Main.java

public static int getUpMonth(Date date) {
    Calendar c = Calendar.getInstance();
    c.setTime(date);//from   w  w w . ja  va2s  .co m
    c.add(Calendar.MONTH, -1);
    return c.get(Calendar.MONTH);
}