RFR: 8306996: Open source Swing MenuItem related tests

[Harshitha Onkar]

On Fri, 5 May 2023 04:56:22 GMT, Abhishek Kumar <abhiscxk at openjdk.org> wrote:

> This PR is to open source JMenuItem related swing tests.

test/jdk/javax/swing/JMenuItem/bug4839464.java line 220:

> 218:         // Check mnemonics
> 219:         int tmpInt = item.getMnemonic();
> 220:         robo.clickMouseOn(changeMnemonicButton);

@DamonGuy Util's JRobot is used here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13822#discussion_r1186568838