march articles code review

Java/java-basics-ii/JavaInstanceOf.java

@@ -0,0 +1,42 @@
+import java.util.*;
+
+public class JavaFinal {
+    public static void main(String[] args) {
+        javaInstanceOfOperator();
+    }
+
+    public static void javaInstanceOfOperator() {
+        String str = "Hello, World!";
+        boolean result = str instanceof String;
+        System.out.println(result);
+    }
+
+    class Animal {}
+    class Dog extends Animal {}
+
+    public void checkInstance() {
+        Animal animal = new Dog();
+        if (animal instanceof Dog) {
+            Dog dog = (Dog) animal;
+            System.out.println("Woof!");
+        }
+    }
+
+    public void javaInstanceOfInterface() {
+        Thread thread = new Thread();
+        if (thread instanceof Runnable) {
+            System.out.println("Thread implements Runnable");
+        }
+    }
+
+    public void typeCastingWithInstanceOf() {
+        Object animal = new Cat();
+        if (animal instanceof Dog) {
+            Dog dog = (Dog) animal;
+            dog.bark();
+        } else if (animal instanceof Cat) {
+            Cat cat = (Cat) animal;
+            cat.meow();
+        }
+    }
+}