assertions...

[Raju Champaklal]

can we set assertions programmatically? whizlabs says we can....want to know how?

[Venu Chakravorty]

Yes we can:

class A {
	public static void main(String[] args) {
		new A().go(5);
	}
	void go(int i) {
		assert( i >= 5);
		System.out.println("asserted "+ i);
	}
}

compile as: $ javac A.java
run as: $ java -ea A
the 'ea' stands for: enable assertions.
if you omit the '-ea' part then 'assert(i >= 5)' will have no effect.

[Oprah Thaddeus]

venu chakravorty wrote:Yes we can:

class A {
	public static void main(String[] args) {
		new A().go(5);
	}
	void go(int i) {
		assert( i >= 5);
		System.out.println("asserted "+ i);
	}
}

compile as: $ javac A.java
run as: $ java -ea A
the 'ea' stands for: enable assertions.
if you omit the '-ea' part then 'assert(i >= 5)' will have no effect.

However, we still have to enable (-ea) during running for the assertion to have any effect! So, I am not still sure how programmatically you can enable the assertion (if that was the question). But definitely, assertions are disabled at runtime by default

[Raju Champaklal]

i was talking about enabling within the program and not using the command line....