Discussion
Which line is an inappropriate use of an assertion?
public class Sample47
{
static void process(int[] data)
{
try
{
assert data.length > 0 : "empty batch";
}
catch (AssertionError e)
{
System.out.println("continuing anyway");
}
}
public static void main(String[] args)
{
process(new int[0]);
}
}
Answer: C
Catching AssertionError and carrying on defeats the point of the assertion: the broken invariant is reported, ignored, and the program continues in the state the assertion said was impossible. AssertionError sits under Error precisely to discourage this. If the condition is recoverable it is not an assertion.
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