java - 检查断言是否启用

Question

您可以assert在ClassLoader.

但是您如何确定它们是否已启用？

（我想采用一些代码路径，仅在启用断言的情况下调用 JVM 时执行昂贵的检查。）

Answer 1

public static boolean areAssertsEnabled() {
  boolean assertsEnabled = false;
  assert assertsEnabled = true; // Intentional side effect!!!
  return assertsEnabled;
}

Answer 2

boolean assertEnabled = false;

try {
   assert false;
} catch (AssertionError e) {
   assertEnabled = true;
}

Answer 3

ManagementFactory.getRuntimeMXBean().getInputArguments().contains("-ea");