如何在没有 GUI 的情况下运行 Java（isHeadless 是真的）？

Question

I guess many people think this question has duplicated ones. However, this question precisely asks

how can I run Java where !GraphicsEnvironment.isHeadless() returns true

The answer would be like

java --gui=disabled -jar hoge.jar

Answer 1

The commandline parameter -Djava.awt.headless=true can be used to set the headless mode from the commandline.

The linked question shows ways to set it programmatically, which is somewhat trickier but may be preferrable if you don't want or can't access the commandline parameters.