Did this on my first programming exam.

int index = 0
int value = 0
try {
while true {
value += array[index]
index++
}
} catch NullPointerException {
System.out.print("Sum: " + value)
}

The task was to add together all numbers in an array.

I somehow aced the exam, but got called in to teachers office this is not the way to use exceptions.