What does “this()” method mean?

Question

I ran into this block of code, and there is this one line I don\'t quit understand the meaning or what it is doing.

public Digraph(In in) {
    this(in.readI         


        

Answer 1

this(); is constructor which is used to call another constructor in a class, for example:-

class A{
  public A(int,int)
   { this(1.3,2.7);-->this will call default constructor
    //code
   }
 public A()
   {
     //code
   }
 public A(float,float)
   { this();-->this will call default type constructor
    //code
   }
}

Note: i did not use this() constructor in default constructor because it will lead to deadlock state.

Hope this will help you:)