SubCommand seems not required to be declared again as a parameter type.

[ShannonDing]

maybe new ArrayList<>(); is OK.

protected static final List<SubCommand> SUB_COMMANDS = new ArrayList<SubCommand>();

https://github.com/apache/rocketmq/blob/develop/tools/src/main/java/org/apache/rocketmq/tools/command/MQAdminStartup.java

[islongfei]

please assigned it to me, i want to try it.

[Aaron-TangCode]

please assigned it to me ,thanks!!!

[CLFutureX]

please assigned it to me, i want to try it.

[alexcao2018]

Please assigned it to me, i want to try it.

[ShannonDing]

Please assigned it to me, i want to try it.

Great, have a try to #5138.

[CLFutureX]

please assigned it to me, i want to try it.

https://github.com/apache/rocketmq/pull/5141/files

[CLFutureX]

please assigned it to me, i want to try it.

https://github.com/apache/rocketmq/pull/5141/files

new pr:
#5143