Picked up _JAVA_OPTIONS: -Djava.net.preferIPv4Stack=true in NetBeans

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Why always show,

Picked up _JAVA_OPTIONS: -Djava.net.preferIPv4Stack=true

Red colored line when I run every code in NetBeans. How can I fix this issue?

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I have had problem (Linux OS) with

Picked up _JAVA_OPTIONS: -Dawt.useSystemAAFontSettings=on -Dswing.aatext=true

and it was solved with terminal command

unset _JAVA_OPTIONS