Java 如何将对象转换为布尔值？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/2206598/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to cast Object to boolean?
提问by Ravi Gupta
How can I cast a Java object into a boolean primitive
如何将 Java 对象转换为布尔原语
I tried like below but it doesn't work
我试过如下，但它不起作用
boolean di = new Boolean(someObject).booleanValue();
The constructor Boolean(Object) is undefined
构造函数 Boolean(Object) 未定义
Please advise.
请指教。
采纳答案by Jon Skeet
If the object is actuallya Booleaninstance, then just cast it:
如果该对象实际上是一个Boolean实例，则只需对其进行强制转换：
boolean di = (Boolean) someObject;
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:
显式强制转换将转换为Boolean，然后自动拆箱到原始值。或者你可以明确地做到这一点：
boolean di = ((Boolean) someObject).booleanValue();
If someObjectdoesn't refer to a Boolean value though, what do you want the code to do?
如果someObject不引用布尔值，您希望代码做什么？
回答by chburd
Assuming that yourObject.toString() returns "true" or "false", you can try
假设 yourObject.toString() 返回“true”或“false”，您可以尝试
boolean b = Boolean.valueOf(yourObject.toString())
