CharacterSubstitutionInterface (java-string-similarity 2.0.0 API)

```
public interface CharacterSubstitutionInterface
```
Used to indicate the cost of character substitution. Cost should always be in [0.0 .. 1.0] For example, in an OCR application, cost('o', 'a') could be 0.4 In a checkspelling application, cost('u', 'i') could be 0.4 because these are next to each other on the keyboard...

Author:

Thibault Debatty

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  double cost(char c1, char c2)
  Indicate the cost of substitution c1 and c2.

- Method Detail
  - cost
```
double cost(char c1,
            char c2)
```
    Indicate the cost of substitution c1 and c2.
    
    Parameters:
    
    c1 - The first character of the substitution.
    
    c2 - The second character of the substitution.
    
    Returns:
    
    The cost in the range [0, 1].