Java – s.equals (“”) and “” What’s the difference between equals (s)

2020-08-21 • Java

First: s.equals ("") and "" What's the difference between equals (s)?

Second: what if I want to perform one of these functions? “”. Substring (1) or '' charAt(0)

Solution

With regard to equality, there is no difference between the two equal variants when it comes to results But the second is nullsafe If s is null, the first will throw a NullPointerException, and the second variable will only evaluate to false

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Java