View difference between Paste ID: X32xNZxp and ytnF6EDF

 /*
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  * and open the template in the editor.
  */
 package bai3;
 
 import java.util.ArrayList;
 import java.util.Scanner;
 
 /**
  *
  * @author pc
  */
 public class Main {
 
     public static Car f3(ArrayList<SUV> cars)
     {
 		for (int i = 0; i < cars.size(); ++i){
 			for (int j = i + 1; j < cars.size(); ++j) {
-				if ((SUV)cars.indexOf(i).getTax < (SUV)cars.indexOf(j).getTax()) {
+				if (cars.indexOf(i).getTax() < cars.indexOf(j).getTax()) {
-					temp = (SUV)cars.indexOf(i);
+					SUV temp = (SUV)cars.indexOf(i);
-					(SUV)cars.indexOf(i) = (SUV)cars.indexOf(j);
+					cars.indexOf(i) = cars.indexOf(j);
-					(SUV)cars.indexOf(j) = temp;
+					cars.indexOf(j) = temp;
 				}
 			}
 		}
 		if (cars.size() <= 1) return null;
         return cars.indexOf(1);
     }
 
     public static void main(String[] args)
     {
         int numcar = 0;
         Scanner scanner = new Scanner(System.in);
         String input;
         System.out.println("Enter the number of car:");
         input = scanner.nextLine();
         numcar = Integer.parseInt(input);
         ArrayList<SUV> cars = new ArrayList<>();
         for (int i = 0; i < numcar; i++) {
             SUV car = new SUV();
             System.out.println("Car serial number:");
             car.serialNumber =scanner.nextLine();
             System.out.println("Car price:");
             car.price = Float.parseFloat(scanner.nextLine());
             System.out.println("Car tax:");
             car.ptax = Float.parseFloat(scanner.nextLine());
             cars.add(car);
         }
         Car secondExpCar = f3(cars);
         System.out.println(secondExpCar.display());
     }
 
 }