PiEstimation (Flink : Examples : Batch 1.20.0-cp1 API)

java.lang.Object
- org.apache.flink.examples.java.misc.PiEstimation

All Implemented Interfaces:

Serializable
```
public class PiEstimation
extends Object
implements Serializable
```
Estimates the value of Pi using the Monte Carlo method. The area of a circle is Pi * R^2, R being the radius of the circle The area of a square is 4 * R^2, where the length of the square's edge is 2*R.
Thus Pi = 4 * (area of circle / area of square).
The idea is to find a way to estimate the circle to square area ratio. The Monte Carlo method suggests collecting random points (within the square) and then counting the number of points that fall within the circle
```
 x = Math.random()
 y = Math.random()

 x * x + y * y < 1
 
```
Note: All Flink DataSet APIs are deprecated since Flink 1.18 and will be removed in a future Flink major version. You can still build your application in DataSet, but you should move to either the DataStream and/or Table API. This class is retained for testing purposes.
See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`PiEstimation.Sampler`	Sampler randomly emits points that fall within a square of edge x * y.
`static class`	`PiEstimation.SumReducer`	Simply sums up all long values.

Constructor Summary

Constructors
Constructor Description

PiEstimation()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type Method Description

static void main(String[] args)
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- PiEstimation
```
public PiEstimation()
```

Method Detail

main

public static void main(String[] args)
                 throws Exception

Throws:: Exception