Why this program showing an error? Constructor a in class a cannot be applied to given types

class A
{
  int i,j;
  A(int i,int j)
  {
    this.i=i;
    this.j=j;
  }
  void show()
  {
    System.out.println("i="+i+" "+"j="+j);
  }
}

class B extends A
{
  int k;
  B(int k)
  {
    this.k=k;
  }
  void showsub()
  {
    System.out.println("i+j+k= "+(i+j+k));
  }
}

class inherit
{
  public static void main(String args[])
  {
    A obj1=new A(3,5);
    B obj2=new B(7);
    obj1.show();
    obj2.showsub();
  }
}