Java compare object to null

You might want to override the default implementation of equals for Customer in case you need to behave it differently. The reality is that when c is null, you are trying to do null. The correct way to do that comparison is "null".

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 12 years, 7 months ago. Active 3 years ago. Viewed 74k times. NullPointerException I thought that I was considering this possibility with my if and else loop. Improve this question. Here is a soultion that allows to sort with NULL values, and is not violating java contracts.

To avoid that, you create a compareTo inside class Tok that violates the compareTo contract, you create an explicit NullSafeComparator:. According to the documentation :. So if you implement a null-safe method, its behaviour will be unexpected aka inconsitent with the documentation and propably with the rest of the API. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.

Learn more. Java: null safe compareTo method Ask Question. Asked 9 years, 1 month ago. Active 5 years, 6 months ago.

Viewed 20k times. It has been asked before, but I have not found a decent implementation with an explanation. Improve this question. Sterling Duchess. Sterling Duchess Sterling Duchess 1, 15 15 gold badges 49 49 silver badges 88 88 bronze badges. MattBall he probably meant this. This code would see the null object as equal to anything else.

May not be the most consistent way of sorting. You don't need to "innovate" in compareTo, aka reinvent the wheel. If you use an IDE it will probably do it for you letting you choose the variables you want to use. Otherwise consider using Guava's ComparisonChain. If you are happy with your own implementation, however, I would get rid of those elses for a neater code.

Show 3 more comments. This will help you avoid network hop, load balancing and other network issue. Spring boot provides you support to create embedded ActiveMQ. Steps to configure embedded broker ActiveMQ with spring boot 1. We also need to provide broker url. August 31, TLS 2 connection between Spring boot client and server. Similar topics Java. Comparing String with ASP. Visual Basic. Comparing Empty Value types.

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