从字符的 ArrayList 中删除一个字符

问题描述

我在循环中面临这种不需要的 char 到 int 转换.假设我有这个字符列表，我想删除其中一个:

I am facing with this unwanted char to int conversion in a loop. Say I have this List of Characters and I want to remove one of those:

List<Character> chars = new ArrayList<>();
chars.add('a');
chars.add('b');
chars.add('c');
chars.remove('a');  // or chars.remove('a'-'0');

所以 'a' 被解释为它的 int 值，我得到一个 IndexOutOfBoundsException 异常.有什么简单的解决方法吗?

so 'a' is interpreted as its int value and I'm getting an IndexOutOfBoundsException exception. Is there any easy workaround for this?

推荐答案

一个 char 被提升为一个 int，它优先于自动装箱，所以 remove(int) 被调用而不是 remove(Object)你可能已经直观地期待了.

A char is promoted to an int, which takes precedence over autoboxing, so remove(int) is called instead of remove(Object) you may have intuitively expect.

您可以通过自己装箱参数来强制调用正确"的方法:

You can force the "right" method to be called by boxing the argument yourself:

chars.remove(Character.valueOf('a'));

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