一个看起来很诡异的问题

wysnylc · 2020-06-08T13:30:15Z

http://ww1.sinaimg.cn/large/6bec4a01gy1gfl7d8a3suj20j5079q3z.jpg HashMap other = new HashMap<>(); new ArrayList ().stream().map(s -> new HashMap () {{ }}).findFirst().orElse(other); Stream.generate(() -> new HashMap ()).findFirst().orElse(other); 各位老哥请指教一二,感谢

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HashMap<String,Object> other = new HashMap<>();
new ArrayList<String>().stream().map(s -> new HashMap<String, Object>() {{
}}).findFirst().orElse(other);
Stream.generate(() -> new HashMap<String, Object>()).findFirst().orElse(other);

各位老哥请指教一二,感谢

4 replies • 2020-06-09 10:19:41 +08:00