Java Calendar to String toString(final Calendar calendar, final String format)

Description

to String

License

Open Source License

Declaration

public static String toString(final Calendar calendar,
            final String format) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2009 Lifeform Software.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*w  ww .ja  v  a2 s  .  com*/
 *     Ernan Hughes - initial API and implementation
 *******************************************************************************/

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.StringTokenizer;
import java.util.TimeZone;

public class Main {
    public static String toString(final long time) {
        Calendar result = Calendar.getInstance();
        result.setTimeInMillis(time);
        return toString(result);
    }

    public static String toString(final Calendar calendar) {
        return toString(calendar, "d MMM yyyy hh:mm aaa");
    }

    public static String toString(final Calendar calendar,
            final String format) {
        final SimpleDateFormat sdf = new SimpleDateFormat(format);
        return sdf.format(calendar.getTime());
    }

    public static Calendar getTime(final String time, final TimeZone tz)
            throws Exception {
        int hours, minutes;
        StringTokenizer st = new StringTokenizer(time, ":");
        int tokens = st.countTokens();
        if (tokens != 2) {
            String msg = "Time " + time
                    + " does not conform to the HH:MM format.";
            throw new Exception(msg);
        }

        String hourToken = st.nextToken();
        try {
            hours = Integer.parseInt(hourToken);
        } catch (NumberFormatException nfe) {
            String msg = hourToken + " in " + time
                    + " can not be parsed as hours.";
            throw new Exception(msg);
        }

        String minuteToken = st.nextToken();
        try {
            minutes = Integer.parseInt(minuteToken);
        } catch (NumberFormatException nfe) {
            String msg = minuteToken + " in " + time
                    + " can not be parsed as minutes.";
            throw new Exception(msg);
        }

        if (hours < 0 || hours > 23) {
            String msg = "Specified hours: " + hours
                    + ". Number of hours must be in the [0..23] range.";
            throw new Exception(msg);
        }

        if (minutes < 0 || minutes > 59) {
            String msg = "Specified minutes: " + minutes
                    + ". Number of minutes must be in the [0..59] range.";
            throw new Exception(msg);
        }

        Calendar period = Calendar.getInstance(tz);
        period.set(Calendar.HOUR_OF_DAY, hours);
        period.set(Calendar.MINUTE, minutes);
        // set seconds explicitly, otherwise they will be carried from the
        // current time
        period.set(Calendar.SECOND, 0);

        return period;
    }
}

Related

1. toString(Calendar c)
2. toString(Calendar cal)
3. toString(Calendar cal)
4. toString(Calendar cal)
5. toString(Calendar calendar)
6. toString(GregorianCalendar g1)