Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2010 The Android Open Source Project
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.regex.*;

public class Main {
    /**
     * Parses an RFC 5545 UTC offset and returns milliseconds.
     * 
     * Grammar:
     *        utc-offset = time-numzone
     *        time-numzone = ("+" / "-") time-hour time-minute [time-second]
     */
    public static int parseUtcOffset(String value) {
        final Pattern utcOffsetPattern = Pattern.compile("([-+])(\\d{1,2})(\\d{2})(?:\\d{2})?");
        final Matcher matcher = utcOffsetPattern.matcher(value);
        if (!matcher.matches()) {
            throw new IllegalArgumentException(value);
        }
        int sign = matcher.group(1).equals("+") ? 1 : -1;
        int hours = Integer.parseInt(matcher.group(2));
        int minutes = Integer.parseInt(matcher.group(3));
        int offsetSeconds = sign * (hours * 60 + minutes) * 60;
        return offsetSeconds * 1000;
    }
}