Why Java Font add a java icon in the Dock of macOs?

Question

public static void main(String[] args) {

    Font arial = Font.getFont(ImmutableMap.of(TextAttribute.FAMILY, "Arial"));
    System.out.println(arial);
}

Having this little program, when executing it on my Mac, it runs (I think) another java process which appears on the Dock (see image below). This icon disappears as soon as the main method ends.

Anyone have an idea why this happens and how to get rid of it ?

NB: The origin of this question is java POI HSSFSheet class. I'm generating some xls files in a web application and when I call HSSFSheet.autoSizeColumn the icon appears in the Dock (nothing happens when a don't call autoSizeColumn). When I followed this issue I found that the icon appears when POI calls Font.getFont.

Environment:
macOS Catalina: 10.15.4
java version "1.8.0_112"

That's simply Java running your program. If you remove the Font creating you will still see it. — , Apr 30 '20 at 11:06
Maybe that's just a timing issue (i.e. it takes some time to get the font info). What about if you replace it with a `for` loop with 10,000 iterations? — trojanfoe, Apr 30 '20 at 11:11

score 1 · Answer 1 · answered Apr 30 '20 at 11:29

1

It happens momentarily because of the following classes:

java.awt.Font;
java.awt.font.TextAttribute;

In short, it will happen with any code using AWT or Swing libraries.

answered Apr 30 '20 at 11:29

Arvind Kumar Avinash

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huum, I see, do you know how to disable this ? – bubbles Apr 30 '20 at 11:31
Not that I'm aware of. I'll post an update if I find a way to disable it. – Arvind Kumar Avinash Apr 30 '20 at 11:33
ok, thank you, another thing: the process behind the icon is the same as the program or another one ? – bubbles Apr 30 '20 at 11:36
This is the standard icon of Java which also matches with the `Java Control Panel` icon in the `System Preferences`. – Arvind Kumar Avinash Apr 30 '20 at 11:38

Why Java Font add a java icon in the Dock of macOs?

1 Answers1