On Mon, 5 Sep 2022 19:56:44 GMT, Andrey Turbanov <aturba...@openjdk.org> wrote:

> The diamond operator was introduced in Java 7. We can take advantage of this 
> language feature to make code easier to read.
> Tested on Linux release x64. `make test TEST="jdk/java/lang/management 
> jdk/javax/management jdk/com/sun/jmx jdk/sun/management"`
> 
> Test summary
> ==============================
>    TEST                                              TOTAL  PASS  FAIL ERROR  
>  
>    jtreg:test/jdk/java/lang/management                  69    69     0     0  
>  
>    jtreg:test/jdk/javax/management                     246   246     0     0  
>  
>    jtreg:test/jdk/com/sun/jmx                            3     3     0     0  
>  
>>> jtreg:test/jdk/sun/management                        33    32     0     1 <<
> 
> Single failure - is a test `RmiBootstrapTest.java#id1`. It's known issue - 
> [JDK-8293335](https://bugs.openjdk.org/browse/JDK-8293335).

src/java.management/share/classes/com/sun/jmx/mbeanserver/ClassLoaderRepositorySupport.java
 line 89:

> 87:      **/
> 88:     private synchronized boolean add(ObjectName name, ClassLoader cl) {
> 89:         List<LoaderEntry> l = new ArrayList<>(Arrays.asList(loaders));

I found it strange that ArrayList is used to just append one element to array. 
I think it's better to just use Arrays.copyOf with length+1.

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

PR: https://git.openjdk.org/jdk/pull/10173

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