Count different values in array in Java

Question

I\'m writing a code where I have an int[a] and the method should return the number of unique values. Example: {1} = 0 different values, {3,3,3} = 0 different values, {1,2} = 2 d

Answer 1

Try this simple code snippet.

public static int differentValuesUnsorted(int[] a)
{
    ArrayList list=new ArrayList();   //import java.util.*;
    for(int i:numbers)                                  //Iterate through all the elements
      if(!list.contains(i))                             //checking for duplicate element
        list.add(i);                                    //Add to list if unique
    return list.size();
}