One of the nice things about IntelliJ is that you don't need to use their annotations. You can write your own, or you can use those of whatever other tool you like. You're not even limited to a single type. If you're using two libraries that use different @NotNull annotations, you can tell IntelliJ to use both of them. To do this, go to "Configure Inspections", click on the "Constant Conditions & Exceptions" inspection, and hit the "Configure inspections" button. I use the Nullness Checker wherever I can, so I set up IntelliJ to use those annotations, but you can make it work with whatever other tool you want. (I have no opinion on the other tools because I've been using IntelliJ's inspections for years, and I love them.)

JSpecify将是一种方法(当它准备好时)。事实上，他们的陈述积极地与这个问题联系在一起，并明确表示他们的目标是最终得到一个好的答案。

它拥有Android、Guava和Kotlin等主要参与者。

One of the nice things about IntelliJ is that you don't need to use their annotations. You can write your own, or you can use those of whatever other tool you like. You're not even limited to a single type. If you're using two libraries that use different @NotNull annotations, you can tell IntelliJ to use both of them. To do this, go to "Configure Inspections", click on the "Constant Conditions & Exceptions" inspection, and hit the "Configure inspections" button. I use the Nullness Checker wherever I can, so I set up IntelliJ to use those annotations, but you can make it work with whatever other tool you want. (I have no opinion on the other tools because I've been using IntelliJ's inspections for years, and I love them.)

如果你正在为android开发，那么你在某种程度上与Eclipse(编辑:在撰写本文时，不再)有一定的联系，它有自己的注释。它包含在Eclipse 3.8+ (Juno)中，但默认禁用。

您可以在首选项> Java >编译器>错误/警告>空分析(底部可折叠部分)中启用它。

勾选“启用基于注释的空分析”

http://wiki.eclipse.org/JDT_Core/Null_Analysis#Usage有关于设置的建议。然而，如果你的工作空间中有外部项目(如facebook SDK)，它们可能不满足这些建议，你可能不想在每次SDK更新时修复它们;-)

我使用:

空指针访问:错误 违反空规范:错误(链接到第1点) 潜在的空指针访问:警告(否则facebook SDK将有警告) 空注释和空推断之间的冲突:警告(链接到第3点)

在等待上游(Java 8?)整理这些注释时，您还可以定义自己的项目本地@NotNull和@Nullable注释。这在使用Java SE时也很有用，因为默认情况下javax.validation.constraints是不可用的。

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 {}

不可否认，这主要是为了装饰或未来的目的，因为上面显然没有为这些注释的静态分析增加任何支持。

较新的项目可能应该使用jakarta。annotation-api(雅加达。注释包)。 它从现在的只读javax链接。注释回购和适应新的Jakarta生态系统，旨在将社区从所有与javax相关的头痛中解放出来。