Ints.java

/*
 * Copyright (C) 2007 The Guava Authors
 *
 * 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.facebook.common.internal;

import java.util.Arrays;

/**
 * Static utility methods pertaining to {@code int} primitives, that are not
 * already found in either {@link Integer} or {@link Arrays}.
 *
 * @author Kevin Bourrillion
 * @since 1.0
 */
public class Ints {
  private Ints() {}

  /**
   * Returns the greatest value present in {@code array}.
   *
   * @param array a <i>nonempty</i> array of {@code int} values
   * @return the value present in {@code array} that is greater than or equal to
   *     every other value in the array
   * @throws IllegalArgumentException if {@code array} is empty
   */
  public static int max(int... array) {
    Preconditions.checkArgument(array.length > 0);
    int max = array[0];
    for (int i = 1; i < array.length; i++) {
      if (array[i] > max) {
        max = array[i];
      }
    }
    return max;
  }

}