RFR: 8275775: Add jcmd VM.classes to print details of all classes [v6]

[Yi Yang]

On Fri, 4 Mar 2022 05:13:58 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> You should change it to `%4d`. Otherwise, when the numbers are changed in the future (e.g., to 3 or 4 digits) they will be misaligned:
> 
> ```
> KlassAddr           Size  State                 Flags    ClassName  
> 0x0000000800df8400  62    fully_initialized     W        java.lang.invoke.LambdaForm$DMH/0x0000000800df8400  
> 0x0000000800df8000  123   fully_initialized     W        java.lang.invoke.LambdaForm$DMH/0x0000000800df8000  
> 0x0000000800de4400  4567  fully_initialized     W        java.lang.invoke.LambdaForm$DMH/0x0000000800de4400  
> ```

This format looks pretty good to me, they are all aligned to left. If you still think it's more proper to have a format like this:

KlassAddr           Size  State                 Flags    ClassName  
0x0000000800df8400  62    fully_initialized     W        java.lang.invoke.LambdaForm$DMH/0x0000000800df8400  
0x0000000800df8000  123   fully_initialized     W        java.lang.invoke.LambdaForm$DMH/0x0000000800df8000  
0x0000000800de4400  4567  fully_initialized     W        java.lang.invoke.LambdaForm$DMH/0x0000000800de4400  

Then I'm glad to do so ;)

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PR: https://git.openjdk.java.net/jdk/pull/7105