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
*
* &＃64;version 1.0
* &＃64;since 1.0
*/
public class MathUtil {
/**
* &＃64;see MathUtil#min(Collection)
* &＃64;param ts
* &＃64;return
*/
public static > T min(T... ts) {
return min(Lists.newArrayList(ts));
}
/**
* 取最小值
* &＃64;param values
* &＃64;throws NullPointerException if (values &＃61;&＃61; null || values.contain(null))
* &＃64;return
*/
public static > T min(Collection values) {
checkNotNull(values);
T min &＃61; null;
for (T t : values) {
checkNotNull(t);
if (min &＃61;&＃61; null) {
min &＃61; t;
} else {
min &＃61; min.compareTo(t) <0 ? min : t;
}
}
return min;
}
/**
* &＃64;see MathUtil#max(Collection)
* &＃64;param ts
* &＃64;return
*/
public static > T max(T... ts) {
return max(Lists.newArrayList(ts));
}
/**
* 取最大值
* &＃64;param values
* &＃64;throws NullPointerException if (values &＃61;&＃61; null || values.contain(null))
* &＃64;return
*/
public static > T max(Collection values) {
checkNotNull(values);
T max &＃61; null;
for (T t : values) {
checkNotNull(t);
if (max &＃61;&＃61; null) {
max &＃61; t;
} else {
max &＃61; max.compareTo(t) > 0 ? max : t;
}
}
return max;
}
/**
* 求和
* &＃64;param values
* &＃64;throws NullPointerException if (values &＃61;&＃61; null || values.contain(null))
* &＃64;return
*/
public static Integer sum(Collection values) {
checkNotNull(values);
int sum &＃61; 0;
for (Integer integer : values) {
checkNotNull(integer);
sum &＃43;&＃61; integer;
}
return sum;
}
/**
* &＃64;see MathUtil#sum(Collection)
* &＃64;param ts
* &＃64;return
*/
public static Integer sum(Integer... ts) {
return sum(Lists.newArrayList(ts));
}
}
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