Can you guess the output without running the code?
The relation to Eclipse is simply the fact that big part of eclipse.org is a great example of good test coverage built on top of jUnit. Plus, it was literally pulling my hair out in one of the eclipse-related testing-suites.
I stepped into this a few years ago while bug-fighting a test class that had unexpected initialization.
Pretty sure that many of you know the answer but definitely fun outcome!
As everyone can simply run this snippet yourself I won’t delay approving comments, I’ll just accept them whenever I get a free moment. This comment system here has captcha but additionally all comments must be approved manually.
import junit.framework.TestCase;
public class MyTest extends TestCase {
private static int count = 0;
{ count++; }
public MyTest() {count++;}
public void test1() { System.out.print(count); }
public void test2() { System.out.print(count); }
public void test3() { System.out.print(count); }
}
I’m sure some of us don’t always take this behavior into account 
After figuring this out, SPECIAL fun is a bit modified case:
import junit.framework.TestCase;
public class MyTest extends TestCase {
private static int count = 0;
{ count=count*2; }
public MyTest() { count++; }
public void test1() { System.out.print(count); }
public void test2() { System.out.print(count); }
public void test3() { System.out.print(count); }
}
For this last snippet I think without running it you won’t figure it out At least I didn’t..
UPDATE: Decent in-depth hi-tech doc about java init http://www.artima.com/designtechniques/initialization7.html
UPDATE2: Correct answers were 666 and 777.
