```
@Documented
@Retention(RUNTIME)
@Target({CONSTRUCTOR,FIELD,METHOD})
public static @interface OptionsByType.Default
```
Defines how an OptionsByType collection may automatically determine a suitable default value for a specific class of option at runtime when the said option does not exist in an OptionsByType collection.
For example, the OptionsByType.Default annotation can be used to specify that a public static no-args method can be used to determine a default value.
```
 public class Color {
     ...
     @Options.Default
     public static Color getDefault() {
         ...
     }
     ...
 }
 
```
Similarly, the OptionsByType.Default annotation can be used to specify a public static field to use for determining a default value.
```
 public class Color {
     ...
     @Options.Default
     public static Color BLUE = ...;
     ...
 }
 
```
Alternatively, the OptionsByType.Default annotation can be used to specify that the public no-args constructor for a public class may be used for constructing a default value.
```
 public class Color {
     ...
     @Options.Default
     public Color() {
         ...
     }
     ...
 }
 
```
Lastly when used with an enum, the OptionsByType.Default annotation can be used to specify the default enum constant.
```
 public enum Color {
     RED,

     GREEN,

     @Options.Default
     BLUE;   // blue is the default color
 }
 
```
See Also:

OptionsByType.get(Class)

Annotation Type OptionsByType.Default