Intellij-Jetbrains是一个非常聪明的IDE，它本身就是你解决许多问题的方法。

Intellij-Jetbrains is very clever IDE and itself suggests you way for solving many problems.

请看下面的截图。它建议你删除此警告的五种方法：

Look at screenshot below. It suggests your five ways for removing this warning:

1）添加断言值！= null ;

2）用替换return语句返回值！= null？ value.toString（）：null;

3）环绕

    if (value != null) {
        return value.toString();
    }

4）通过添加评论来抑制对此特定陈述的检查：

4) suppress inspection for this particular statement by adding commentary:

//noinspection ConstantConditions
return value.toString();

5）至少添加，因为之前的@ochi建议使用 @SuppressWarnings（ ConstantConditions）注释，可用于方法或整个类。

5) add at least, as earlier @ochi suggested use @SuppressWarnings("ConstantConditions") annotation which can be used for method or for whole class.

要调用此上下文菜单，请使用快捷键 Alt + Enter （我认为它们适用于所有操作系统）。

To invoke this context menu use shortcut keys Alt+Enter (I think they are common for all OS).