Spark_rdd's simple Java function interface

Name of function	Method of implementation	Use
Function<t, r>	R Call (T)	Receives an input value and returns an output value for similar map () and in operations such as filter ()
Function2<t1, T2, r>	R Call (T1, T2)	Receives two input values and returns an output value for similar aggregate () and fold () and other operations
Flatmapfunction<t, r>	Iterable<r> Call (T)	Receives an input value and returns any output for a similar flatMap () In such an operation

rdd<string> errors = Lines.filter (new function<string, boolean>() { Public return x.contains ("error");});

Spark_rdd's simple Java function interface