In this Java programming tutorial, we will learn how to find a missing number in an array of continuous numbers.The numbers in the array will be shuffled.For example, for the numbers 1,2,3,5, we know that 4 is missing. Our program will find out this value. In the example below, we will try two different approaches - one to find out one single missing number and the second one to find out multiple missing numbers. Let's take a look at the examples below :.