While waiting for this to be sorted out upstream (Java 8?), you could also just define your own project-local @NotNull and @Nullable annotations. This can be useful also in case you're working with Java SE, where javax.validation.constraints isn't available by default.

import java.lang.annotation.*; /** * Designates that a field, return value, argument, or variable is * guaranteed to be non-null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface NotNull {} /** * Designates that a field, return value, argument, or variable may be null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface Nullable {} 

This would admittedly largely be for decorative or future-proofing purposes, since the above obviously doesn't in and of itself add any support for the static analysis of these annotations.

While waiting for this to be sorted out upstream (Java 8?), you could also just define your own project-local @NotNull and @Nullable annotations. This can be useful also in case you're working with Java SE, where javax.validation.constraints isn't available by default.

import java.lang.annotation.*; /** * Designates that a field, return value, argument, or variable is * guaranteed to be non-null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface NotNull {} /** * Designates that a field, return value, argument, or variable may be null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface Nullable {} 

This would admittedly largely be for decorative or future-proofing purposes, since the above obviously doesn't in and of itself add any support for the static analysis of these annotations.

While waiting for this to be sorted out upstream (Java 8?), you could also just define your own project-local @NotNull and @Nullable annotations. This can be useful also in case you're working with Java SE, where javax.validation.constraints isn't available by default.

import java.lang.annotation.*; /** * Designates that a field, return value, argument, or variable is * guaranteed to be non-null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface NotNull {} /** * Designates that a field, return value, argument, or variable may be null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface Nullable {} 

While waiting for this to be sorted out upstream (Java 8?), you could also just define your own project-local @NotNull and @Nullable annotations. This can be useful also in case you're working with Java SE, where javax.validation.constraints isn't available by default.

import java.lang.annotation.*; /** * Designates that a field, return value, argument, or variable is * guaranteed to be non-null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface NotNull {} /** * Designates that a field, return value, argument, or variable may be null. */ @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE}) @Documented @Retention(RetentionPolicy.CLASS) public @interface Nullable {} 

This would admittedly largely be for decorative or future-proofing purposes, since the above obviously doesn't in and of itself add any support for the static analysis of these annotations.