如何使用replace(char,char)来替换所有字符b的实例 [英] How to use replace(char, char) to replace all instances of character b with nothing

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问题描述

我如何使用替换(char,char)以替换所有字符b的实例。

How do i use replace(char, char) to replace all instances of character "b" with nothing.

例如:

Hambbburger to Hamurger

编辑:有一个约束,我可能只使用1.4.2,这意味着没有重载的重载版本!

There is a constraint, i may only use 1.4.2, meaning no overloaded version of replace!

推荐答案

还有一个 replaceAll 使用字符串的函数,但请注意它将它们作为正则表达式进行删除,但是替换单个字符将会很好。

There's also a replaceAll function that uses strings, note however that it evals them as regexes, but for replacing a single char will do just fine.

以下是一个例子:

String meal = "Hambbburger";

String replaced = meal.replaceAll("b","");

请注意,已替换变量是必要的 replaceAll 不会更改字符串,但会创建一个带有替换的新字符串( String 在java中是不可变的) 。

Note that the replaced variable is necessary since replaceAll doesn't change the string in place but creates a new one with the replacement (String is immutable in java).

如果要替换的字符在正则表达式中具有不同的含义(例如 char将匹配任何字符,而不是点)你需要引用这样的第一个参数:

If the character you want to replace has a different meaning in a regex (e.g. the . char will match any char, not a dot) you'll need to quote the first parameter like this:

String meal = "Ham.bur.ger";

String replaced = meal.replaceAll(Pattern.quote("."),"");

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