# Package org.eclipse.jdt.annotation

package org.eclipse.jdt.annotation
This package contains annotations that can trigger special behavior when annotated types are compiled by the Eclipse Compiler for Java.

Currently, the package contains annotations that specify nullness contracts for annotated elements.

Additionally, class `Checks` provides utility methods for performing checked type conversions.

Class
Description
Checks
Utility functions intended for use with the null annotations defined in this package.
DefaultLocation
Locations that can be affected by a `NonNullByDefault` annotation.
NonNull
Qualifier for a reference type in a `TYPE_USE` position: The type that has this annotation is intended to not include the value `null`.
NonNullByDefault
Applying this annotation to a declaration has the effect that type references, which are contained in the declaration, and for which a null annotation is otherwise lacking, should be considered as `@NonNull`.
Nullable
Qualifier for a reference type in a `TYPE_USE` position: The type that has this annotation explicitly includes the value `null`.