如何将对象转换为布尔值？ [英] How to cast Object to boolean?

问题描述

如何将一个Java对象转换为一个布尔原语

How can I cast a Java object into a boolean primitive

我试过下面但是不工作

boolean di = new Boolean(someObject).booleanValue();

构造函数Boolean（Object）未定义

The constructor Boolean(Object) is undefined

请告知。

推荐答案

em> c 实例

boolean di = (Boolean) someObject;

显式转换将转换为 Boolean ，然后是原始值的自动取消装箱。或者你可以明确地做到：

The explicit cast will do the conversion to Boolean, and then there's the auto-unboxing to the primitive value. Or you can do that explicitly:

boolean di = ((Boolean) someObject).booleanValue();

如果 someObject 布尔值虽然，你想让代码做什么？

If someObject doesn't refer to a Boolean value though, what do you want the code to do?

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