AssertinC#&Java-创新互联
Assert是什么?
断言(Assertion)是一种调试程序的方式。C#中的Assert
In a debug compilation, Assert takes in a Boolean condition as a parameter, and shows the error dialog if the condition is false. The program proceeds without any interruption if the condition is true.
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If you compile in Release, all Debug.Assert's are automatically left out.
ref: https://stackoverflow.com/questions/163538/c-sharp-what-does-the-assert-method-do-is-it-still-useful
Java中的Assert
Assertions (by way of the assert keyword) were added in Java 1.4. They are used to verify the correctness of an invariant in the code.
code
public static void main(String[] args) {
String name = null;
assert (name != null) : "name is null, maybe a bug";
System.out.println(name);
}
JVM start args
"vmArgs":"-ea" //enable assertions
result
Exception in thread "main" java.lang.AssertionError: name is null, maybe a bug
at App.main(App.java:7)
ref:https://stackoverflow.com/questions/2758224/what-does-the-java-assert-keyword-do-and-when-should-it-be-used
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