Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

public class Main {
    /**
     * Returns the floating-point value adjacent to <code>d</code> in
     * the direction of negative infinity.  This method is
     * semantically equivalent to <code>nextAfter(d,
     * Double.NEGATIVE_INFINITY)</code>; however, a
     * <code>nextDown</code> implementation may run faster than its
     * equivalent <code>nextAfter</code> call.
     *
     * <p>Special Cases:
     * <ul>
     * <li> If the argument is NaN, the result is NaN.
     *
     * <li> If the argument is negative infinity, the result is
     * negative infinity.
     *
     * <li> If the argument is zero, the result is
     * <code>-Double.MIN_VALUE</code>
     *
     * </ul>
     *
     * @param d  starting floating-point value
     * @return The adjacent floating-point value closer to negative
     * infinity.
     * @author Joseph D. Darcy
     */
    public static double nextDown(double d) {
        if (isNaN(d) || d == Double.NEGATIVE_INFINITY)
            return d;
        else {
            if (d == 0.0)
                return -Double.MIN_VALUE;
            else
                return Double.longBitsToDouble(Double.doubleToRawLongBits(d) + ((d > 0.0d) ? -1L : +1L));
        }
    }

    /**
     * Returns the floating-point value adjacent to <code>f</code> in
     * the direction of negative infinity.  This method is
     * semantically equivalent to <code>nextAfter(f,
     * Float.NEGATIVE_INFINITY)</code>; however, a
     * <code>nextDown</code> implementation may run faster than its
     * equivalent <code>nextAfter</code> call.
     *
     * <p>Special Cases:
     * <ul>
     * <li> If the argument is NaN, the result is NaN.
     *
     * <li> If the argument is negative infinity, the result is
     * negative infinity.
     *
     * <li> If the argument is zero, the result is
     * <code>-Float.MIN_VALUE</code>
     *
     * </ul>
     *
     * @param f  starting floating-point value
     * @return The adjacent floating-point value closer to negative
     * infinity.
     * @author Joseph D. Darcy
     */
    public static double nextDown(float f) {
        if (isNaN(f) || f == Float.NEGATIVE_INFINITY)
            return f;
        else {
            if (f == 0.0f)
                return -Float.MIN_VALUE;
            else
                return Float.intBitsToFloat(Float.floatToRawIntBits(f) + ((f > 0.0f) ? -1 : +1));
        }
    }

    /**
     * Returns <code>true</code> if the specified number is a
     * Not-a-Number (NaN) value, <code>false</code> otherwise.
     *
     * <p>Note that this method is equivalent to the {@link
     * Double#isNaN(double) Double.isNaN} method; the functionality is
     * included in this class for convenience.
     *
     * @param   d   the value to be tested.
     * @return  <code>true</code> if the value of the argument is NaN;
     *          <code>false</code> otherwise.
     */
    public static boolean isNaN(double d) {
        return Double.isNaN(d);
    }

    /**
     * Returns <code>true</code> if the specified number is a
     * Not-a-Number (NaN) value, <code>false</code> otherwise.
     *
     * <p>Note that this method is equivalent to the {@link
     * Float#isNaN(float) Float.isNaN} method; the functionality is
     * included in this class for convenience.
     *
     * @param   f   the value to be tested.
     * @return  <code>true</code> if the argument is NaN;
     *          <code>false</code> otherwise.
     */
    public static boolean isNaN(float f) {
        return Float.isNaN(f);
    }
}