Use a naming convention to ignore the unused variable warning

[gonghenghai]

For example :

        for (String i : arrayName)
            ArrayListName.add(someIntVariable++);

I need the length of arrayName, but I need not i. Obviously, the language server will prompt the warning of The value of the local variable i is not used.

I can suppress the warning through add @SuppressWarnings("unused") before the method/class. But IntelliJ has a better solution: you can rename i to ignored to suppress this warning. Could we provide a similar function?

[rgrunber]

I think it might be interesting to have some kind of convention that automatically ignores unused variables. If there were enough of a demand for this, it could be done. Prefixing the variable with an underscore (eg. _i) seems to be common to make it clear it isn't used.

If you don't want to be informed of any unused varaibles, you can also set java.settings.url to some file, and make sure it contains :

org.eclipse.jdt.core.compiler.problem.unusedLocal=ignore

See https://github.com/redhat-developer/vscode-java/wiki/Settings-Global-Preferences for the full set of options.

[ObstinateM]

It would be useful to get the underscore convention for unused variable as it acknowledge that you won't going to use it a specific variable. Much cleaner than disabling it globally