ThreeSmallestElement.java

public class ThreeSmallestElement {
    public static void leastThreeElements(int [] arrA){

        if(arrA.length<3){
            System.out.println("Invalid Input, array size is less than 3");
        }

        int first=Integer.MAX_VALUE;
        int second=Integer.MAX_VALUE;
        int third = Integer.MAX_VALUE;

        for (int i = 0; i <arrA.length ; i++) {
            int current = arrA[i];
            if(first>current){
                third = second;
                second = first;
                first = current;
            }else if(second>current){
                third = second;
                second = current;
            }else if(third>current){
                third=current;
            }
        }
        System.out.println("least three elements are: " + first + " " + second + " " + third);
    }

    public static void main(String[] args) {
        int [] arrA = new int [] { 6, 8, 1, 9, 2, 10};
        leastThreeElements(arrA);
    }
}