Discussion
Which line is an inappropriate use of an assertion?
public class Sample59
{
static int made = 0;
Sample59()
{
assert ++made > 0;
}
public static void main(String[] args)
{
new Sample59();
new Sample59();
System.out.println(made);
}
}
Answer: C
The counter is incremented inside the assertion, so it records constructions only when -ea is set: the program prints 2 with assertions on and 0 with them off. A count the program reports is state it depends on, and must be maintained by an ordinary statement.
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