43 lines
1.3 KiB
Java
43 lines
1.3 KiB
Java
/*
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* Copyright 2010 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.collections;
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import java.util.Random;
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public
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class MathUtil {
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public static final Random random = new Random();
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/** Returns a random number between 0 (inclusive) and the specified value (inclusive). */
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static public int random (int range) {
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return random.nextInt(range + 1);
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}
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/** Returns a random number between start (inclusive) and end (inclusive). */
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static public int random (int start, int end) {
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return start + random.nextInt(end - start + 1);
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}
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/**
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* Returns the next power of two. Returns the specified value if the value is already a power of two.
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*/
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public static
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int nextPowerOfTwo(int value) {
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return 1 << (32 - Integer.numberOfLeadingZeros(value - 1));
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}
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}
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