Need help interpreting this script

[Jake Miller]

Here is a 2 part script taken from Head First Java:

public class EchoTestDrive {
public static void main(String[] args) {
Echo e1 = new Echo();
Echo e2 = new Echo();
int x = 0;
while(x < 4) {
e1.hello();
e1.count = e1.count + 1;
if(x == 3) {
e2.count = e2.count + 1;
}
if(x > 0) {
e2.count = e2.count + e1.count;
}
x = x + 1;
}
System.out.println(e2.count);
}
}
 
------------------------------------
 
class Echo {
int count = 0;
void hello() {
System.out.println("helloooo...");
}
}

And the output:


helloooo...
helloooo...
helloooo...
helloooo...
10


Now I went through and tried to "run" this program myself and here is how I did it:

[B]x     e1.count     e2.count[/B]
0       1             1
1       2             3
2       3             6
3       4             11

(I hope this shows up ok).
Clearly I am wrong in adding these values up. I realize this may be a difficult question to answer online, but could someone point to where I went wrong? Thanks in advance


Edit by mw: Added code tags to formatted "table."
[ July 16, 2007: Message edited by: marc weber ]

[Jake Miller]

Wow, that table did not show up at all how I wanted it to. Those are supposed to be columns with the headers: "x" "e1.count" "e2.count" and the values underneath. The key value (I think) is the 11 I got vs the 10 the program outputs.

[marc weber]

Originally posted by Jake Miller:
Wow, that table did not show up at all how I wanted it to. Those are supposed to be columns...

To preserve formatting with spaces like this, you can put the text inside code tags. I edited the original post for you.

[marc weber]

See this post and try running the modified version of the code I posted there. Let us know if this helps.

[Jake Miller]

Haha, awesome, thanks a lot. I was doing exactly the same thing as Raymond in that post. Thanks again!