What to do when "This character cannot be mapped to encoding MS932" appears when using Javadoc in Eclipse

If you try to output documentation with Javadoc in Eclipse,
What to do if you get stuck with the error "This character cannot be mapped to encoding MS932".

The cause is that the source code and the character code of HTML output by Javadoc are different.

The solution is to specify this properly.

The method is as follows.

In Eclipse, open the "File | Export | Java | JavaDoc", "Configure JavaDoc arguments" dialog,
-encoding UTF-8 -docencoding Windows-31J " -encoding UTF-8 -docencoding Windows-31J " in "Additional Javadoc options".

Specify the character code specified in the source code
Specify the character code you want to use in the document

that's all.

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