本文整理汇总了Java中java.util.concurrent.ConcurrentHashMap.reduceKeysToDouble方法的典型用法代码示例。如果您正苦于以下问题：Java ConcurrentHashMap.reduceKeysToDouble方法的具体用法？Java ConcurrentHashMap.reduceKeysToDouble怎么用？Java ConcurrentHashMap.reduceKeysToDouble使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.util.concurrent.ConcurrentHashMap的用法示例。
在下文中一共展示了ConcurrentHashMap.reduceKeysToDouble方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testReduceKeysToDoubleSequentially
import java.util.concurrent.ConcurrentHashMap; //导入方法依赖的package包/类
/**
* reduceKeysToDoubleSequentially accumulates mapped keys
*/
public void testReduceKeysToDoubleSequentially() {
ConcurrentHashMap<Long, Long> m = longMap();
double dr = m.reduceKeysToDouble(Long.MAX_VALUE, (Long x) -> x.doubleValue(), 0.0, Double::sum);
assertEquals(dr, (double)SIZE * (SIZE - 1) / 2);
}
示例2: testReduceKeysToDoubleInParallel
import java.util.concurrent.ConcurrentHashMap; //导入方法依赖的package包/类
/**
* reduceKeysToDoubleInParallel accumulates mapped values
*/
public void testReduceKeysToDoubleInParallel() {
ConcurrentHashMap<Long, Long> m = longMap();
double dr = m.reduceKeysToDouble(1L, (Long x) -> x.doubleValue(), 0.0, Double::sum);
assertEquals(dr, (double)SIZE * (SIZE - 1) / 2);
}