COURSE-276 Add Main class with exception handling examples

exceptions-end/Main.java

@@ -0,0 +1,50 @@
+package com.baeldung;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeParseException;
+import java.util.InputMismatchException;
+import java.util.Scanner;
+
+public class Main {
+
+    public static void main(String[] args) {
+        String invalidDate = "2050/12/31";
+        try {
+            LocalDate date = LocalDate.parse(invalidDate);
+            System.out.println("Date parsed: " + date);
+        } catch (DateTimeParseException e) {
+            System.out.println("Error: The date format isn’t correct.");
+        }
+
+        Scanner scanner = new Scanner(System.in);
+        try {
+            System.out.print("Enter a number: ");
+            int number = scanner.nextInt();
+            System.out.println("You entered: " + number);
+        } catch (InputMismatchException e) {
+            System.out.println("Error: That's not a valid number.");
+        } finally {
+            System.out.println("Closing scanner...");
+            scanner.close();
+        }
+
+        try {
+            validatePriority(-5);
+        } catch (IllegalArgumentException e) {
+            System.out.println("Error: " + e.getMessage());
+        }
+
+        String text = null;
+        // int length = text.length(); // uncomment to trigger NPE
+
+        int[] numbers = {1, 2, 3};
+        // int number = numbers[5]; // uncomment to trigger ArrayIndexOutOfBoundsException
+    }
+
+    public static void validatePriority(int priority) {
+        if (priority < 0) {
+            throw new IllegalArgumentException("Priority cannot be negative");
+        }
+        System.out.println("Priority is valid: " + priority);
+    }
+}