BIBD

java.lang.Object
- org.jacop.examples.fd.ExampleFD
- - org.jacop.examples.fd.BIBD

```
public class BIBD
extends ExampleFD
```
It models and solves Balanced Incomplete Block Design (BIBD) problem (CSPLIB-P28).

Version:

4.8

Field Summary

Fields
Modifier and Type	Field	Description
`int`	`b`	It specifies number of columns in the incidence matrix.
`int`	`k`	It specifies number of ones in each column.
`int`	`lambda`	It specifies the value of the scalar product of any two distinct rows.
`int`	`r`	It specifies number of ones in each row.
`int`	`v`	It specifies number of rows in the incidence matrix.
`(package private) IntVar[][]`	`x`

Fields inherited from class org.jacop.examples.fd.ExampleFD
cost, search, store, vars

Constructor Summary

Constructors
Constructor Description

BIBD()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`main(java.lang.String[] args)`	It executes the program to solve the Langford problem.
`void`	`model()`	It specifies a standard way of modeling the problem.

Methods inherited from class org.jacop.examples.fd.ExampleFD
creditSearch, getSearch, getSearchVariables, getStore, printMatrix, search, searchAllAtOnce, searchAllOptimal, searchLDS, searchMasterSlave, searchMaxRegretOptimal, searchMiddle, searchMostConstrainedStatic, searchOptimal, searchSmallestDomain, searchSmallestMedian, searchSmallestMiddle, searchSmallestMin, searchWeightedDegree, searchWithMaxRegret, searchWithRestarts, shavingSearch

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - v
```
public int v
```
    It specifies number of rows in the incidence matrix.
  - b
```
public int b
```
    It specifies number of columns in the incidence matrix.
  - r
```
public int r
```
    It specifies number of ones in each row.
  - k
```
public int k
```
    It specifies number of ones in each column.
  - lambda
```
public int lambda
```
    It specifies the value of the scalar product of any two distinct rows.
  - x
```
IntVar[][] x
```
- Constructor Detail
  - BIBD
```
public BIBD()
```
- Method Detail
  - model
```
public void model()
```
    Description copied from class: ExampleFD
    
    It specifies a standard way of modeling the problem.
    
    Specified by:
    
    model in class ExampleFD
  - main
```
public static void main(java.lang.String[] args)
```
    It executes the program to solve the Langford problem. It is possible to specify two parameters. If no parameter is used then default values for n and m are used.
    
    Parameters:
    
    args - the first parameter denotes n, the second parameter denotes m.