抽象类的构造函数请求返回类型

abstract class AbstractClass {
    protected int value;

    public AbstractClass(int value) {
        this.value = value;
    }

    public abstract void abstractMethod();
}

class ConcreteClass extends AbstractClass {
    public ConcreteClass(int value) {
        super(value);
    }

    public void abstractMethod() {
        System.out.println("Abstract method implementation");
    }
}

public class Main {
    public static void main(String[] args) {
        ConcreteClass obj = new ConcreteClass(10);
        obj.abstractMethod();
    }
}