Discussion
The program is run with java Probe02 - what will be the output?
public class Probe02
{
public static void main(String[] args)
{
int[] a = new int[3];
assert a.length == 5;
System.out.println(a.length);
}
}
Answer: B
Without -ea the assertion is skipped entirely, so the clearly false claim that the array has five elements costs nothing. The print then reports the real length, 3. This is exactly why an assertion must never be the only thing checking a condition you actually rely on.
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