long value most Significant Bit - Java Language Basics

Java examples for Language Basics:Bit

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Description

long value most Significant Bit

Demo Code

/*******************************************************************************
 * Copyright 2013 EMBL-EBI/* w  w  w  . j av a 2  s.  c  o m*/
 * 
 * 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.
 ******************************************************************************/
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        long value = 2;
        System.out.println(mostSignificantBit(value));
    }

    public static int mostSignificantBit(final long value) {
        int i = 64;
        while (--i >= 0 && (((1L << i) & value)) == 0)
            ;
        return i;
    }
}

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