Integer value comparison with null vallue

Question

Hi I had a question related to Integer comparison.

say I have two Integer count1 and count2, I want to implement the following action:

if (count1 bigger than count2)
    do something;
else
    do something else;

I know I can use count1.compareTo(count2) > 0. however, when count1 or count2 is a null value, program will return a NullPointerException. Is there a way to implement that if count1 or count2 is a null value, return false when doing comparison between count1 and count2?

^ if(count1 == null || count2 == null) then return false. Simples — Lex Webb, Apr 23 '14 at 16:07

score 5 · Answer 1 · answered Apr 23 '14 at 16:07

5

I think you want:

if (count1 != null && count2 != null && count1 > count2)
    do something;
else
    do something else;

Java will auto un-box the Integer objects to int primitive values to make the mathematical > comparison.

answered Apr 23 '14 at 16:07

Bohemian

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Peter Lawrey · Answer 2 · 2014-04-23T16:06:46.020

2

Is there a way to implement that if count1 or count2 is a null value, return false

if (count1 == null || count2 == null) return false;
if (count1 > count2)
   doSomething();
else
   doSomethingElse();

edited Apr 23 '14 at 16:06

answered Apr 23 '14 at 16:06

Peter Lawrey

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Integer value comparison with null vallue

2 Answers2