Writing first Java class using IntelliJ

section3/HelloWorld/src/Demo.java

@@ -0,0 +1,53 @@
+public class Demo {
+
+    public static void main(String[] args) {
+        System.out.println("Hello Madan");
+    }
+
+
+    /**
+     * Adds two numbers
+     * @param a the first number
+     * @param b the second number
+     * @return the sum of the two numbers
+     */
+    public static int add(int a, int b) {
+        System.out.println("Sum: " + (a+b));
+        return a + b;
+    }
+
+    /**
+     * Subtracts two numbers
+     * @param a the first number
+     * @param b the second number
+     * @return the difference of the two numbers
+     */
+    public static int subtract(int a, int b) {
+        System.out.println("Difference: " + (a-b));
+        return a - b;
+    }
+
+    /**
+     * Multiplies two numbers
+     * @param a the first number
+     * @param b the second number
+     * @return the product of the two numbers
+     */
+    public static int multiply(int a, int b) {
+        System.out.println("Product: " + (a*b));
+        return a * b;
+    }
+
+    /**
+     * Divides two numbers
+     * @param a the first number
+     * @param b the second number
+     * @return the quotient of the two numbers
+     */
+    public static double divide(int a, int b) {
+        System.out.println("Quotient: " + (a/b));
+        return (double)a / b;
+    }
+
+
+}