To answer this question, let's go through the code step by step:
- We start by executing the
main method in the Hawk class.
- The first line in the
main method is System.out.print("pre ");, which prints "pre ".
- The next line is
new Hawk();, which creates a new instance of the Hawk class.
- Since
Hawk extends Raptor, which extends Bird, the first thing that happens when we create a new instance of Hawk is the execution of the Bird constructor.
- The
Bird constructor contains an instance initializer block, which prints "bl ".
- Then, the
Bird constructor itself prints "b2 ".
- After the
Bird constructor is executed, we move on to the Raptor constructor.
- Before the
Raptor constructor, there is a static initializer block, which prints "r1 ".
- Then, the
Raptor constructor itself prints "r2 ".
- Next, there is another instance initializer block in the
Raptor class, which prints "r3 ".
- Finally, there is another static initializer block in the
Raptor class, which prints "r4 ".
- After the
Raptor constructor is executed, we move back to the Hawk constructor.
- Since there are no instance initializer blocks in the
Hawk class, we move directly to the Hawk constructor, which does not contain any print statements.
- After the
Hawk constructor is executed, we go back to the main method.
- The last line in the
main method is System.out.println("hawk ");, which prints "hawk ".
Based on the above explanation, the result will be:
D. r1 r4 pre b1 b2 r3 r2 hawk