Java OCA OCP Practice Question 988

Question

What is the result of the following? 

1: public class MyClass { 
2:   String value = "t"; 
3:   { value += "a"; } 
4:   { value += "c"; } 
5:   public MyClass() { 
6:     value += "b"; 
7:   } // ww  w. j a  va  2 s .c om
8:   public MyClass(String s) { 
9:     value += s; 
10:  } 
11:  public static void main(String[] args) { 
12:    MyClass order = new MyClass("f"); 
13:    order = new MyClass(); 
14:    System.out.println(order.value); 
15:  } 
16:} 

A.   tacb 
B.   tacf 
C.   tacbf 
D.   tacfb 
E.   tacftacb 
F.   The code does not compile. 
G.   An exception is thrown. 



A.

Note

Line 4 instantiates an MyClass.

Java runs the declarations and instance initializers first in the order they appear.

This sets value to tacf.

Line 5 creates another MyClass and initializes value to tacb.

The object on line 5 is stored in the same variable line 4 used.

This makes the object created on line 4 unreachable.

When value is printed, it is the instance variable in the object created on line 5.




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