Exercise Answers¶
Question 1:¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | public class QuestionOne { public static void main(String[] args) { byte d1 = 125; short d2 = 32000; int d3 = 500000; long d4 = 9999999999L; float d5 = 10.4f; double d6 = -50112.56; char d7 = 'A'; boolean d8 = true; System.out.println("byte: " + d1); System.out.println("short: " + d2); System.out.println("int: " + d3); System.out.println("long: " + d4); System.out.println("float: " + d5); System.out.println("double: " + d6); System.out.println("char: " + d7); System.out.println("boolean: " + d8); } } |
Question 2:¶
Note
There are two solutions to this question
1 2 3 4 5 6 7 8 9 10 11 12 | public class QuestionTwo { public static void main(String[] args) { int x = 105; System.out.println("Original: " + x); System.out.println("Change 1: " + (x = 110)); System.out.println("Change 2: " + (x = -15)); System.out.println("Change 3: " + (x = 12)); } } |
or
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | public class QuestionTwo { public static void main(String[] args) { int x = 105; System.out.println("Original: " + x); x = 110; System.out.println("Change 1: " + x); x = -15; System.out.println("Change 2: " + x); x = 12; System.out.println("Change 3: " + x); } } |
Question 3:¶
1 2 3 4 5 6 7 8 9 10 11 | public class QuestionThree { public static void main(String[] args) { int x = 10; int y = 12; int z = 42; System.out.println(x + " + " + y + " + " + z + " = " + (x + y + z)); } } |
Challenge Question¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.edu.unit3; import java.util.Scanner; /** * * @author james */ public class ChallengeQuestion { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("Welcome to the Pythagorean Calculator!!!\n"); System.out.print("Enter the length of side A: "); double a = input.nextDouble(); System.out.print("Enter the length of side B: "); double b = input.nextDouble(); System.out.println("Calculating"); double result = Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2)); System.out.println("The length of the hypotenuse is: " + result); } } |
Output
Welcome to the Pythagorean Calculator!!!
Enter the length of side A: 3
Enter the length of side B: 4
Calculating
The length of the hypotenuse is: 5.0