Lesson 1: Introduction to Java

Activity 1: Printing the Results of Simple Arithmetic Operations

Solution:

1. Create a class named Operations as follows:

   public class Operations
   {

2. Within main(), print a sentence describing the operation on the values you will be performing along with the result:

       public static void main(String[] args) {
           System.out.println("The sum of 3 + 4 is " + (3 + 4));
           System.out.println("The product of 3 + 4 is " + (3 * 4));
       }
   }

   The output will be as follows:

   The sum of 3 + 4 is 7
   The product of 3 + 4 is 12

Activity 2: Reading Values from the User and Performing Operations Using the Scanner Class.

Solution:

1. Right-click the src folder and select New | Class.

2. Enter ReadScanner as the class name, and then click OK.

3. Import the java.util.Scanner package:

   import java.util.Scanner;

4. In the main() enter the following:

   public class ReadScanner
   {
       static Scanner sc = new Scanner(System.in);
     public static void main(String[] args) {
       System.out.print("Enter a number...