example code abstract class constructor

package funds;

abstract class AbstractDemo {
    AbstractDemo()
    {
        System.out.println("this is abstruct class constructor");
        
    }
    abstract void m1();
}
public class AbstractConst extends AbstractDemo
{
    public void m1()
    {
        System.out.println("m1 implementation");
    }
    public static void main(String arg[]){
        AbstractConst a=new AbstractConst();
    }
}

output:
this is abstruct class constructor