RFR: 8316964: Security tools should not call System.exit [v5]

[Andrey Turbanov]

On Mon, 16 Oct 2023 16:23:13 GMT, Weijun Wang <weijun at openjdk.org> wrote:

>> Remove most `System.exit()` calls in various security tools and only leave one in the `main` method. This paves the way to convert them to JSR 199 tools.
>> 
>> Note: before this change, the behavior of a successful `main()` method execution is not consistent. Sometimes the method returns silently, sometimes a `System.exit(0)` is called somewhere. After this change, the method always returns silently. This makes sure that existing programs that calls the `main` method directly will continue and does not exit the VM.
>
> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   inline some throw statements, remove duplicated whitespaces

src/java.security.jgss/windows/classes/sun/security/krb5/internal/tools/Kinit.java line 131:

> 129:         } catch (Exception e) {
> 130:             String msg;
> 131:             if (e instanceof KrbException) {

Let's simplify with pattern matching variable

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PR Review Comment: https://git.openjdk.org/jdk/pull/15951#discussion_r1364260468