Add java.util.Objects.dump to facilitate quick debugging

[Mariell Hoversholm]

Hey,

Out of curiosity, why not just `System.out.println(person)`?

On Thu, 9 Jun 2022 at 08:08, Yi Yang <qingfeng.yy at alibaba-inc.com> wrote:

> Is it helpful to add a new Objects.dump method for quick debugging? Not in
> all cases
> we can open IDEA and happily use jdb to debug our code, sometimes we may
> just want
> to write a simple script, or work without IDE, for these cases, we can use
> Objects. dump
> to output field details of the object and feed back to the developer, so
> that they can quickly
> modify the code and continue to develop. Another useful scenario is
> working within jshell,
> Objects.dump can visualize object details, which is especially useful for
> REPL environments.
>
> It looks like var_dump() in PHP[1] :
> ```
> Person p = new Person(...)
> Objects.dump(p)
> Person = {
>   name = "..."
>   age = 24
>   height = 1.75f
>   attr = {
>      ...
>   }
> }
> ```
> In addition, we can also add Config parameters to allow users to control
> output content and
> format they expect, such as
> ```
> config.pretty = true
> config.maxDepth = 5
> config.dumpParent = true
> config.fieldFilter (Field f) -> ...
> Objects.dump(obj, config)
> ```
> This is just a very rough idea, it's too early to discuss implementation
> details at this point,
> I'm looking forward to hearing more feedback about the idea of adding
> Objects.dump itself.
>
> Thanks.
>
> [1] https://www.php.net/manual/en/function.var-dump.php