add Kanoonsantikul.java (#155)

Java/Kanoonsantikul.java

@@ -0,0 +1,33 @@
+import java.util.List;
+
+public class Kanoonsantikul {
+
+	private static class Person {
+		public String eat(Object input) {
+			return "Poop";
+		}
+	}
+
+	private static class Programmer extends Person {
+		@Override
+		public String eat(Object input) {
+			if (input.getClass().getSimpleName().equals("Coffee")) {
+				return "Code";
+			} else {
+				return super.eat(input);
+			}
+		}
+	}
+
+	private static class Coffee {}
+
+	public static void main(String[] args) {
+		Programmer bob = new Programmer();
+		List<Object> menuList = List.of("0xDEADBEEF", false, 100_000_000, new Coffee());
+		for (Object menu : menuList) {
+			System.out.println("What happen if programmer eat " + menu.getClass().getSimpleName());
+			System.out.println("It is " + bob.eat(menu) + "!!");
+		}
+	}
+
+}