public int getSmallest2(int[] nums)

Given an int[] array with 2 elements
return the smallest value.

Create an int return variable called smallest.
Assign it a default value, e.g. the first element.
Use an if statement to check if the other value is smaller -
and if it is smaller, change the value of smallest to that value.

public int getSmallest2(int[] nums) {
  int smallest = nums[0];
  if (nums[1] < smallest) {
    smallest = nums[1];
  }
  return smallest;
}

Note: Another way to check for the smaller of two values is to use Math.min():

public int getSmallest2(int[] nums) {
  int smallest = Math.min( nums[0], nums[1] );
  return smallest;
}