java - 为每个包启用断言

Question

是否可以为每个包启用 Java 断言？我想在我的代码中使用断言，但与我的代码一起运行的其中一件事破坏了一些不相关的断言，作者拒绝修复它(至少现在，这不是严重错误)。

Answer 1

这是可能的，参见 http://docs.oracle.com/javase/7/docs/technotes/guides/language/assert.html#enable-disable

启用和禁用断言

To enable assertions at various granularities, use the -enableassertions, or -ea, switch. To disable assertions at various granularities, use the -disableassertions, or -da, switch. You specify the granularity with the arguments that you provide to the switch:

• packageName...
  Enables or disables assertions in the named package and any subpackages.
• ...
  Enables or disables assertions in the unnamed package in the current working directory.
• className
  Enables or disables assertions in the named class

For example, the following command runs a program, BatTutor, with assertions enabled in only package com.wombat.fruitbat and its subpackages:

java -ea:com.wombat.fruitbat... BatTutor

您可以为所有包启用断言，然后为某些包禁用断言。或者 - 禁用所有包，然后只启用其中的一些包。