如何在流式传输时删除 HashMap 的元素(lambda)
我有以下需要从流中删除元素的情况.
I have the following situation where I need to remove an element from a stream.
map.entrySet().stream().filter(t -> t.getValue().equals("0")).
forEach(t -> map.remove(t.getKey()));
在 Java 8 之前的代码中,可以从迭代器中删除 - 在这里处理这种情况的最佳方法是什么?
in pre Java 8 code one would remove from the iterator - what's the best way to deal with this situation here?
推荐答案
map.entrySet().removeIf(entry -> entry.getValue().equals("0"));
你不能用流来做到这一点,但你可以用其他新方法做到这一点.
You can't do it with streams, but you can do it with the other new methods.
更好:
map.values().removeAll(Collections.singleton("0"));
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