package com.happyelements.athene.game.util; import static com.google.common.base.Preconditions.checkNotNull; import java.util.Collection; import com.google.common.collect.Lists; /**  * Math工具类  *   * @version 1.0  * @since 1.0  */ public class MathUtil {  /**   * @see MathUtil#min(Collection)   * @param ts   * @return   */  public static <T extends Comparable<T>> T min(T... ts) {   return min(Lists.newArrayList(ts));  }  /**   * 取最小值   * @param values   * @throws NullPointerException if (values == null || values.contain(null))   * @return   */  public static <T extends Comparable<T>> T min(Collection<T> values) {   checkNotNull(values);   T min = null;   for (T t : values) {    checkNotNull(t);    if (min == null) {     min = t;    } else {     min = min.compareTo(t) < 0 ? min : t;    }   }   return min;  }  /**   * @see MathUtil#max(Collection)   * @param ts   * @return   */  public static <T extends Comparable<T>> T max(T... ts) {   return max(Lists.newArrayList(ts));  }  /**   * 取最大值   * @param values   * @throws NullPointerException if (values == null || values.contain(null))   * @return   */  public static <T extends Comparable<T>> T max(Collection<T> values) {   checkNotNull(values);   T max = null;   for (T t : values) {    checkNotNull(t);    if (max == null) {     max = t;    } else {     max = max.compareTo(t) > 0 ? max : t;    }   }   return max;  }  /**   * 求和   * @param values   * @throws NullPointerException if (values == null || values.contain(null))   * @return   */  public static Integer sum(Collection<Integer> values) {   checkNotNull(values);   int sum = 0;   for (Integer integer : values) {    checkNotNull(integer);    sum += integer;   }   return sum;  }  /**   * @see MathUtil#sum(Collection)   * @param ts   * @return   */  public static Integer sum(Integer... ts) {   return sum(Lists.newArrayList(ts));  } }