Returns true if the rounding is considered to use too many digits of the double for a fast rounding - Java java.lang

Java examples for java.lang:double

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Description

Returns true if the rounding is considered to use too many digits of the double for a fast rounding

Demo Code

/*//from   ww  w  .  ja v a2s . com
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 {
    /**
     * Returns true if the rounding is considered to use too many digits
     * of the double for a fast rounding
     *
     * @param source the source to round
     * @param scale the scale to round at
     * @return true if the rounding will potentially use too many digits
     */
    private static boolean tooManyDigitsUsed(double source, int scale) {
        // if scale >= 308, 10^308 ~= Infinity
        double decExp = Math.log10(source);
        return scale >= 308 || decExp + scale >= 14.5;
    }
}

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