Simplify code with Lambda

[freekry]

Simplify code with Lambda

[codecov-io]

Codecov Report

Merging #4834 into master will increase coverage by 0.6%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master    #4834     +/-   ##
===========================================
+ Coverage     63.31%   63.91%   +0.6%     
+ Complexity      451      450      -1     
===========================================
  Files           790      769     -21     
  Lines         35021    33174   -1847     
  Branches       5472     5231    -241     
===========================================
- Hits          22172    21203    -969     
+ Misses        10317     9548    -769     
+ Partials       2532     2423    -109

Impacted Files	Coverage Δ	Complexity Δ
.../apache/dubbo/qos/protocol/QosProtocolWrapper.java	65.85% <0%> (-17.08%)	0% <0%> (ø)
...he/dubbo/remoting/transport/netty/NettyServer.java	69.64% <0%> (-3.58%)	8% <0%> (-1%)
...g/apache/dubbo/rpc/protocol/rest/RestProtocol.java	68.21% <0%> (-3.11%)	0% <0%> (ø)
.../rpc/protocol/dubbo/LazyConnectExchangeClient.java	56.47% <0%> (-2.36%)	0% <0%> (ø)
...pache/dubbo/registry/support/AbstractRegistry.java	78.54% <0%> (-1.54%)	0% <0%> (ø)
.../apache/dubbo/remoting/transport/AbstractPeer.java	63.04% <0%> (ø)	0% <0%> (ø)	⬇️
...a/org/apache/dubbo/common/json/ParseException.java
...o/rpc/protocol/thrift/DubboClassNameGenerator.java
.../java/org/apache/dubbo/common/json/JSONObject.java
.../java/org/apache/dubbo/common/json/JSONWriter.java
... and 17 more

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[lixiaojiee]

lgtm