类的使用
org.apache.flink.streaming.api.functions.aggregation.AggregationFunction

使用AggregationFunction的程序包

程序包	说明
org.apache.flink.streaming.api.datastream
org.apache.flink.streaming.api.functions.aggregation

org.apache.flink.streaming.api.datastream中AggregationFunction的使用

参数类型为AggregationFunction的org.apache.flink.streaming.api.datastream中的方法

限定符和类型	方法和说明
protected SingleOutputStreamOperator<T>	KeyedStream.aggregate(AggregationFunction<T> aggregate)

org.apache.flink.streaming.api.functions.aggregation中AggregationFunction的使用

org.apache.flink.streaming.api.functions.aggregation中AggregationFunction的子类

限定符和类型	类和说明
class	ComparableAggregator<T> An AggregationFunction that computes values based on comparisons of Comparables.
class	SumAggregator<T> An AggregationFunction that sums up fields.