openjdk-jdk8u/jdk/src/share/classes/java/util/HashMap.java ... If multiple threads access a hash map concurrently, and at least one of. ... <看更多>

I would do the initialisation while setting up the HashMap. For example private static final Map<String, String> m = new HashMap<String, ... ... <看更多>

在官方文档中是这样描述HashMap的：. Hash table based implementation of the Map interface. This implementation provides all of the optional map ... ... <看更多>

... <看更多>