Rava2 - Java Source Interpreter

public class Main {
    public static void main(String[] args) {
        Object[] items = {
            "Hello",
            42,
            3.14,
            new Dog("Buddy"),
            new Cat("Whiskers"),
            true
        };

System.out.println("Pattern matching with instanceof:");
        for (Object item : items) {
            describeItem(item);
        }
    }

static void describeItem(Object obj) {
        if (obj instanceof String s) {
            System.out.println("String of length " + s.length() + ": \"" + s + "\"");
        } else if (obj instanceof Integer i) {
            System.out.println("Integer: " + i + " (doubled: " + (i * 2) + ")");
        } else if (obj instanceof Double d) {
            System.out.println("Double: " + d);
        } else if (obj instanceof Dog dog) {
            System.out.println("Dog: " + dog.bark());
        } else if (obj instanceof Cat cat) {
            System.out.println("Cat: " + cat.meow());
        } else if (obj instanceof Boolean b) {
            System.out.println("Boolean: " + b);
        } else {
            System.out.println("Unknown type");
        }
    }
}

class Animal {
}

class Dog extends Animal {
    private String name;
    Dog(String name) { this.name = name; }
    String bark() { return name + " says Woof!"; }
}

class Cat extends Animal {
    private String name;
    Cat(String name) { this.name = name; }
    String meow() { return name + " says Meow!"; }
}

ready