The following text was written to the standard output stream when the Primes program was executed from IntelliJ.
package arraylistplay; import java.util.ArrayList; public class Primes { public static void main(String[] args) { ArrayListprimes = new ArrayList<>(); primes.add(2); primes.add(3); primes.add(5); primes.add(7); System.out.println("size of primes list = " + primes.size()); System.out.println("first prime = " + primes.get(0)); System.out.println("last prime = " + primes.get(3)); System.out.println("last prime = " + primes.get(primes.size()-1)); System.out.println("\nThe initial list ... "); for (Integer prime : primes ){ System.out.println(prime); } int temp = primes.get(0); primes.set(0, primes.get(primes.size()-1)); primes.set(primes.size() - 1, temp); System.out.println("\nThe final list ... "); for(Integer prime : primes) { System.out.println(prime); } } }