org.apache.flink.api.java
org.apache.flink.api.java.aggregation
org.apache.flink.api.java.functions
org.apache.flink.api.java.io
org.apache.flink.api.java.operators
org.apache.flink.api.java.operators.join
org.apache.flink.api.java.operators.translation
org.apache.flink.api.java.sampling
org.apache.flink.api.java.summarize
org.apache.flink.api.java.summarize.aggregation
org.apache.flink.api.java.utils