Answer 1

Yes, it is. The easiest is like this:

first_loop: for (int i = 0; i < 5; i++) {
for (int n = i; n < 5; n++) {
if (i + n > 7) break first_loop;
System.out.println(n);
}
}

You could do it with optional variables, but it is more difficult:

boolean readyToBreak = false;
for (int i = 0; i < 5; i++) {
for (int n = i; n < 5; n++) {
if (i + n > 7) {
readyToBreak = true;
break;
}
System.out.println(n);
}
if (readyToBreak) break;
}