Java. The output is true. Can you justify the answer?

public class If2 { static boolean b1, b2; public static void main(String [] args) { int x = 0; if (!b1) { if (!b2) { b1 = true; x++; if (5 > 6) { x++; } if (!b1) { x = x + 10; } else if (b2 = true) { x = x + 100; } else if (b1 | b2) { x = x + 1000; } } }

System.out.println(x);

} }