Tech&Wk_program_syntax_java_Concurrency

Java programming concurrency

1. language syntax

AtomicLong currencId = new AtomicLong();

获取 Long id = currentId.incrementAndGet();  线程安全的标识符序列号

ConcurrencyMap<Long, obj>  map = new Concurrency<>();  线程安全

obj.setId(id);

map.putIfAbsent(id, obj);   如果 obj 不存在，则存入map

List<Obj> objvalues = new ArrayList<Obj>(map.values());

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