java.util.Objects.equals和com.google.common.base.Objects.equals有什么区别？

Question

是否有任何理由使用Guava而不是java.util实现？

Answer 1

java.util.Objects and its equals method only exist since Java 7. The Guava version predates it. If you are using at least Java 7, there's no reason to use the Guava version.

Answer 2

One difference besides the fact that the Guava method predates the Java 7 one: the Guava method is called equal while the Java method is called equals . This is actually significant because it means the Java version can't be used with a static import. (Even ignoring that, I think equal is a better name for a static method that takes two arguments and compares them for equality, while equals is better for an instance method like Object.equals .)

All that said, if you're on JDK7 you should probably use the java.util.Objects version.