错误：拾取java_options：-Djava.net.preferIPv4Stack = true

Question

我在执行涉及Ionic和Android的cmd中的任何操作时遇到此错误，例如， Ionic构建Android或Ionic仿真Android等等......错误意味着什么，它很重要，我该如何解决它？如果变量JAVA_TOOL_OPTIONS或_JAVA_OPTIONS设置

Answer 1

这个 “错误” 会发生。我不相信它是或者应该对任何事情都很关心。只要应用程序运行良好，我看不出真正的问题。所以不，这不是非常重要，而且看到应用程序仍然建立（并且很可能正常工作），但我没有理由尝试纠正它。

此外，如果您在应用程序中确实存在错误（根本原因），则this可能会有所帮助。

相关/重要从线程后：

A quick Google search indicates that this is output from the Java virtual machine upon realizing that certain environment variables, JAVA_TOOL_OPTIONS and JAVA_OPTIONS have been set.

http://www.nbl.fi/~nbl97/java/tuning/troubles/

These variables might be introduced in your Eclipse launch configuration. More likely, they may have been set in your workstation's environment by something you've recently installed.

On Windows XP, you can access the environment variables by right clicking on "My Computer", selecting "Properties", switch to the "Advanced" tab and click "Environment Variables". In that window, you should be able to see if the environment variable has been set up.

Alternatively, you can open a command prompt and type "SET" to see what environment variables have been set.

Answer 2

我敢肯定的_JAVA_OPTIONS变量是在您的环境设置夹着，它显示无处。为了解决这个问题，

1. 按Windows键的同时
2. 暂停/ Break键的窗口将会弹出，点击“高级系统设置”
3. 点击“环境变量”
4. 检查系统变量。
5. 删除_JAVA_OPTIONS条目。