本文介绍了创建带有重复元素的列表的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
Java中是否存在一种实用程序方法,该方法可以生成具有指定长度的列表或数组,并且所有元素都等于指定值(例如["foo","foo","foo","foo","foo"])?
Is there an utility method in Java that generates a list or array of a specified length with all elements equal to a specified value (e.g ["foo", "foo", "foo", "foo", "foo"])?
推荐答案您可以使用 Collections.nCopies .请注意,这会将 reference 复制到给定的对象,而不是对象本身.如果您使用的是字符串,则无所谓,因为它们始终是不可变的.
You can use Collections.nCopies. Note that this copies the reference to the given object, not the object itself. If you're working with strings, it won't matter because they're immutable anyway.
List<String> list = Collections.nCopies(5, "foo"); System.out.println(list); [foo, foo, foo, foo, foo]更多推荐
创建带有重复元素的列表
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