Arthas from Alibaba, is an online trouble-shooting tool. No JVM restart, no additional code chan...

AtomicIntegerArrayprivate static final int base = unsafe.arrayBaseOffset(int[].class);private fin...

1. package structureconcurrent - atomic - locks - ... (several classes)2. atomicAtomic*(AtomicBoo...

When I was deploying my service to the server today, which is a debian 9 linux node, I met a stra...

1. jpsusage: jps [-help] jps [-q] [-mlvV] [<hostid>]Definitions: <hostid>: ...

Purpose:represent the void return type as a class and contain a Class public value. It is not ins...

The first two commits are local commits.View git log:$ git log yi@C02D37L9MD6R  ~/code/git/test-...

判断一个可能为空的字段不为某个值:select * from tblwhere tbl_col_1 <> 'CERTAIN_VALUE'如果某行该字段的值为nullselect ...

Programs in linux can be run as daemon by using &. But sometimes after the shell is closed, t...