[RandomJava] add catch exception example

fishercoder1534 · fishercoder1534 · commit 3aac1c38b2af · 2025-08-14T08:59:04.000-07:00
diff --git a/src/main/java/catchExceptions/CatchException.java b/src/main/java/catchExceptions/CatchException.java
@@ -0,0 +1,35 @@
+package catchExceptions;
+
+/**This program shows that if the inner catch block:
+ * catch (ArithmeticException ae)
+ * cannot catch the exception, in this case, it's RuntimeException, it'll be caught by the outer catch:
+ * catch (Exception e)
+ * although the exception is being thrown from the inner try block.
+ * */
+public class CatchException {
+    private static void throwExceptionMethod(int a, int b) {
+        try {
+            //do something here..
+            int c = a + b;
+            System.out.println("c is " + c );
+
+            try {
+                System.out.println(a / b);
+                throw new RuntimeException("a random exception");
+            } catch (ArithmeticException ae) {
+                System.out.println("It enters ArithmeticException branch.");
+                ae.printStackTrace();
+                // throw ae;
+            }
+        } catch (Exception e) {
+            System.out.println("It enters Exception branch: " + e.getMessage());
+            e.printStackTrace();
+            // throw e;
+        }
+    }
+
+    public static void main(String[] args) {
+        throwExceptionMethod(2, 4);
+        System.out.println("That's the end of the program!");
+    }
+}
