assertions

How can I enable the assert keyword in Eclipse? public class A { public static void main(String ... args) { System.out.println(1); assert false; System.out.println(2); } } To be specific: Go to Run->run configuration select java application in left nav pan. right click and select New . select Arguments tab Add -ea in VM arguments. If anyone wants to enable assertions by default (in contrast to enabling them for just a single run configuration), it is possible with the following steps: Window (menu bar) Preferences Java Installed JREs Select your JRE/JDK Press Edit... Default VM arguments Add

I'd like to implement an "assert" that prevents compilation, rather than failing at runtime, in the error case. I currently have one defined like this, which works great, but which increases the size of the binaries. #define MY_COMPILER_ASSERT(EXPRESSION) switch (0) {case 0: case (EXPRESSION):;} Sample code (which fails to compile). #define DEFINE_A 1 #define DEFINE_B 1 MY_COMPILER_ASSERT(DEFINE_A == DEFINE_B); How can I implement this so that it does not generate any code (in order to minimize the size of the binaries generated)? A compile-time assert in pure standard C is possible, and a

I have been reading some source code and in several places I have seen the usage of assert . What does it mean exactly? What is its usage? The assert statement exists in almost every programming language. It helps detect problems early in your program, where the cause is clear, rather than later as a side-effect of some other operation. When you do... assert condition ... you're telling the program to test that condition, and immediately trigger an error if the condition is false. In Python, it's roughly equivalent to this: if not condition: raise AssertionError() Try it in the Python shell: >