kotlin是否比java更好？
kotlin is a more 现代 and efficient language than java. it allows some more shorthand coding along with compiling 上to jvm and javascript. from a technical perspective, it can be said “better” than java as you would be able to perform more work with comparatively less coding.
android通常使用null来表示缺少值。 kotlin通过直接在其类型系统中使用null来解决它。 kotlin比java更简洁，并且与所有java库和框架兼容。此外，java虚拟机可以与kotlin集成。