program 4.3

SaketJNU · SaketJNU · commit 980daca62661 · 2025-05-28T14:18:42.000+05:30
diff --git a/ucer/4B4/4_3.java b/ucer/4B4/4_3.java
@@ -0,0 +1,40 @@
+import java.io.*;
+
+class ExceptionDemo {
+
+    // Method demonstrating a checked exception
+    public static void readFile(String fileName) throws IOException {
+        FileReader file = new FileReader(fileName); // may throw FileNotFoundException
+        BufferedReader fileInput = new BufferedReader(file);
+
+        System.out.println("Reading first line from file:");
+        System.out.println(fileInput.readLine());
+
+        fileInput.close();
+    }
+
+    // Method demonstrating an unchecked exception
+    public static void divide(int a, int b) {
+        int result = a / b; // may throw ArithmeticException
+        System.out.println("Result: " + result);
+    }
+
+    public static void main(String[] args) {
+        // Handling unchecked exception
+        try {
+            System.out.println("Demonstrating Unchecked Exception:");
+            divide(10, 0); // division by zero
+        } catch (ArithmeticException e) {
+            System.out.println("Caught an unchecked exception: " + e);
+        }
+
+        // Handling checked exception
+        try {
+            System.out.println("\nDemonstrating Checked Exception:");
+            readFile("nonexistentfile.txt"); // file may not exist
+        } catch (IOException e) {
+            System.out.println("Caught a checked exception: " + e);
+        }
+    }
+}
+
