public @interface

NonNull

implements java.lang.annotation.Annotation

 androidx.annotation.NonNull

Gradle dependencies

compile group: 'androidx.annotation', name: 'annotation', version: '1.2.0-alpha01'

  • groupId: androidx.annotation
  • artifactId: annotation
  • version: 1.2.0-alpha01

Artifact androidx.annotation:annotation:1.2.0-alpha01 it located at Google repository (https://maven.google.com/)

Androidx artifact mapping:

androidx.annotation:annotation com.android.support:support-annotations

Androidx class mapping:

androidx.annotation.NonNull android.support.annotation.NonNull

Overview

Denotes that a parameter, field or method return value can never be null.

This is a marker annotation and it has no specific attributes.

Summary

Source

/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package androidx.annotation;

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.LOCAL_VARIABLE;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PACKAGE;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.CLASS;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Denotes that a parameter, field or method return value can never be null.
 * <p>
 * This is a marker annotation and it has no specific attributes.
 */
@Documented
@Retention(CLASS)
@Target({METHOD, PARAMETER, FIELD, LOCAL_VARIABLE, ANNOTATION_TYPE, PACKAGE})
public @interface NonNull {
}