| Package | Description | 
|---|---|
| javax.annotation | 
| Modifier and Type | Class and Description | 
|---|---|
| interface  | CheckForNullThe annotated element might be null, and uses of the element should check for null. | 
| interface  | CheckForSignedUsed to annotate a value that may be either negative or nonnegative, and
 indicates that uses of it should check for
 negative values before using it in a way that requires the value to be
 nonnegative, and check for it being nonnegative before using it in a way that
 requires it to be negative. | 
| interface  | Detainted | 
| interface  | NullableThe annotated element could be null under some circumstances. | 
| interface  | RegExThis qualifier is used to denote String values that should be a Regular
 expression. | 
| interface  | SignedUsed to annotate a value of unknown sign. | 
| interface  | TaintedThis annotation is used to denote String values that are tainted, i.e. may come
 from untrusted sources without proper validation. | 
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