RFR: 8267670: Update java.io, java.math, and java.text to use switch expressions [v2]

[Chris Hegarty]

On Tue, 25 May 2021 14:57:22 GMT, Patrick Concannon <pconcannon at openjdk.org> wrote:

>> Hi,
>> 
>> Could someone please review my code for updating the code in the `java.io`, `java.math`, and `java.text` packages to make use of the switch expressions?
>> 
>> Kind regards,
>> Patrick
>
> Patrick Concannon has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - 8267670: Updated code to use yield
>  - Merge remote-tracking branch 'origin/master' into JDK-8267670
>  - 8267670: Update java.io, java.math, and java.text to use switch expressions

src/java.base/share/classes/java/io/ObjectStreamClass.java line 2172:

> 2170:                 switch (typeCodes[i]) {
> 2171:                     case 'L', '[' -> vals[offsets[i]] = unsafe.getReference(obj, readKeys[i]);
> 2172:                     default       -> throw new InternalError();

suggest:

    vals[offsets[i]] = switch (typeCodes[i]) {
        case 'L', '[' -> unsafe.getReference(obj, readKeys[i]);
        default       -> throw new InternalError();

src/java.base/share/classes/java/io/StreamTokenizer.java line 787:

> 785:             case TT_WORD    -> ret = sval;
> 786:             case TT_NUMBER  -> ret = "n=" + nval;
> 787:             case TT_NOTHING -> ret = "NOTHING";

This is not correct, the assignments to ret in these case arms is redundant.

-------------

PR: https://git.openjdk.java.net/jdk/pull/4182