Java Integer.MAX_VALUE与Kotlin Int.MAX_VALUE [英] Java Integer.MAX_VALUE vs Kotlin Int.MAX_VALUE

问题描述

我注意到了一件有趣的事情.
Java的Integer.MAX_VALUE是0x7fffffff(2147483647)
Kotlin的Int.MAX_VALUE是2147483647
但是如果你写
在Java中:
int value = 0xFFFFFFFF; //everything is fine (but printed value is '-1')
在Kotlin:
val value: Int = 0xFFFFFFFF //You get exception The integer literal does not conform to the expected type Int

I noticed, one interesting thing.
Java's Integer.MAX_VALUE is 0x7fffffff (2147483647)
Kotlin's Int.MAX_VALUE is 2147483647
but if you write
in Java:
int value = 0xFFFFFFFF; //everything is fine (but printed value is '-1')
in Kotlin:
val value: Int = 0xFFFFFFFF //You get exception The integer literal does not conform to the expected type Int

有趣吗?因此，您可以在Java中执行new java.awt.Color(0xFFFFFFFF, true)之类的功能，但在Kotlin中执行不能的功能.

Interesting right? So you're able to do something like new java.awt.Color(0xFFFFFFFF, true) in Java but not in Kotlin.

Color类在二进制"级别上与该int一起使用，因此对于具有所有构造函数(Color(int rgba)或Color(int r, int g, int b, int a))的两个平台，一切都可以正常工作. 我为kotlin找到的唯一解决方法是java.awt.Color(0xFFFFFFFF.toInt(), true).

Color class works with that int on "binary" level, so everything works fine for both platforms with all constructors (Color(int rgba) or Color(int r, int g, int b, int a)).
Only workaround which I found for kotlin is java.awt.Color(0xFFFFFFFF.toInt(), true).

有人知道为什么在Kotlin会这样吗?

Any idea why is it like this in Kotlin?

推荐答案

我认为，此问题应由 Kotlin 1.3 和UInt解决 在此处查看更多信息: https://kotlinlang.org/docs/reference/whatsnew13. html#unsigned-integers

I think, this problem should be solved by Kotlin 1.3 and UInt See more here: https://kotlinlang.org/docs/reference/whatsnew13.html#unsigned-integers

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