In Java, the Assert keyword was introduced from Java SE 1.4, in order to avoid using the Assert keyword in the old version of Java code to cause an error, Java does not start the assertion check by default (at this point, all assertion statements will be ignored!). ), if you want to turn on assertion checking, you need to turn on the switch-enableassertions or-ea. The Assert keyword syntax is simple and has two uses: 1, assert <boolean expression > if <boolean expression > is True, the program continues execution. If False, the program throws a assertionerror and terminates execution. 2. Assert <boolean expression >: < error message expression > if <boolean expression > True, the program continues execution. If False, the program throws a Java.lang.AssertionError and input < error message expression >.
Javase Assert Assertion Learning
