Is there a constructor in an abstract class?

Yes, an abstract class in Java can have a constructor. Although an abstract class cannot be instantiated directly, its constructor is called when creating an object of a subclass. The constructor of an abstract class is used to initialize common fields and perform shared logic needed by all inheritors.

Example:

abstract class Animal {
    String name;

    Animal(String name) {
        this.name = name;
    }
}

class Dog extends Animal {
    Dog(String name) {
        super(name);
    }
}

Dog dog = new Dog("Buddy");