Write the following method that sorts an ArrayList of numbers. public static void sort(ArrayList list)

Solution

Verified

Answered 5 months ago

Step 1

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import java.math.BigDecimal;
import java.util.*;

public class Sort {
    public static void main(String[] args) {
        ArrayList<Number> tst = new ArrayList<>();
        Scanner input = new Scanner(System.in);

        System.out.println("Enter five Numbers");
        for (int i = 0; i < 5; i++) {
            tst.add(input.nextDouble());
        }

        input.close();

        sort(tst);
        System.out.println(tst);
    }

    /** bubble sort */
    public static void sort(ArrayList<Number> list){
        Number temp;
        for (int x=0; x<list.size(); x++){ 
            for (int i=0; i < list.size()-x-1; i++) {
                if (compareTo(list.get(i), list.get(i+1)) > 0){
                    temp = list.get(i);
                    list.set(i,list.get(i+1) );
                    list.set(i+1, temp);
                }
            }
        }
    }

    private static int compareTo(Number n1, Number n2) {
        // ignoring null handling
        BigDecimal b1 = new BigDecimal(n1.doubleValue());
        BigDecimal b2 = new BigDecimal(n2.doubleValue());
        return b1.compareTo(b2);
    }
}