Cdigo de calcular el rea de un ciruculo1.import java.util.Scanner; 2. 3.public class ConvertirAToneladas { 4. public static void main(String[] args) { 5. 6. double radio, area; 7. System.out.println("HALLA EL AREA DE UN CIRCULO"); 8. System.out.print("Ingresar el radio r = "); 9. Scanner scanner = new Scanner(System.in); 10. radio = scanner.nextFloat(); 11. area = (3.14159*radio*radio); 12. System.out.println("Area = " + area); 13. }