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SCJP help

Maggie Ling
Greenhorn

Joined: Sep 06, 2006
Posts: 8
Hi Guys, I have one small question with the following code:

1. class Banana {
2. int x = 1;
3. public static void main(String [] args) {
4. int x = 2;
5. Banana b = new Banana();
6. b.go();
7. }
8. { x += x; } // What is this?
9. void go() {
10. ++x;
11. System.out.println(x);
12. }
13. }


What is the result?
marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343

Unmarked braces (line 8 in this code) denote "initializer blocks," which execute when the class is initialized. In this case, when an instance of Banana is created, the instance variable x (not the local variable x) is first initialized to 1, but then the initializer code increments it to 2.

Note: Braces preceded with "static" are "static blocks," which execute when the class is loaded.


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Rahuldf sharmadf
Greenhorn

Joined: Sep 18, 2006
Posts: 3
Also instance intialization is called after super class construction

for ex

class a
{
int a;

{
a=10;
}
a()
{
super()
// Now instance intializations will be called in top - down orders

}

static public void main(strings args[])
{
new a();
}

}
 
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subject: SCJP help
 
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