K & B-Self test Ch 03 question no $

[kiruthigha rajan]

class Mixer {
Mixer() { }
Mixer(Mixer m) { m1 = m; }
Mixer m1;
public static void main(String[] args) {
Mixer m2 = new Mixer(); //Line1
Mixer m3 = new Mixer(m2);//Line2
 m3.go();//Line3
Mixer m4 = m3.m1;//Line4
 m4.go();//Line5
Mixer m5 = m2.m1;//Line6
 m5.go();//Line7
}
void go() { System.out.print("hi "); }
}

What is the result?
A. hi
B. hi hi
C. hi hi hi
D. Compilation fails
E. hi, followed by an exception
F. hi hi, followed by an exception

The answer given is F.
Line1 is Executed an object is created.
Line2 is executed m2 is passed to m and not m1 and m2 are pointing to same object.
Line3 Hi gets printed
Line4 points m3.m1 what is the meaning of this?? is this means m1 instance variable of m3 object which means the instance variable in m2(since both m1 and m2 are pointing the same object)???
Line6 points m2.m1 what does this mean??
anyone help me out this mess..i surfed many posts posted before but i didnt get the point..
thanks in advance

[saloni jhanwar]

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