Java Number Round round(int n)

Description

round

License

Apache License

Declaration

public static int round(int n) 

Method Source Code

//package com.java2s;
/**/*  www .  ja  v  a2  s .c  o m*/
 * Copyright 2008 - 2011
 * 
 * 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.
 * 
 * @project loonframework
 * @author chenpeng
 * @email?ceponline@yahoo.com.cn
 * @version 0.1
 */

public class Main {
    static private final int BIG_ENOUGH_INT = 16 * 1024;
    static private final double BIG_ENOUGH_ROUND = BIG_ENOUGH_INT + 0.5f;

    public static int round(int n) {
        if (n > 0) {
            if ((n & 0x8000) != 0) {
                return (((n + 0x10000) >> 16) << 16);
            } else {
                return (((n) >> 16) << 16);
            }
        } else {
            int k;
            n = -n;
            if ((n & 0x8000) != 0) {
                k = (((n + 0x10000) >> 16) << 16);
            } else {
                k = (((n) >> 16) << 16);
            }
            return -k;
        }
    }

    public static int round(float x) {
        return (int) (x + BIG_ENOUGH_ROUND) - BIG_ENOUGH_INT;
    }
}

Related

1. round(final long timeMs, final int precision)
2. round(int a, int cutOfDigits)
3. round(int f)
4. round(int start, int boundary)
5. round(int t, int n, int decimals)
6. round(int top, int div2, int divisor)
7. round(int x, int quantum)