如何从字符串中删除单个字符 [英] How to remove single character from a String

问题描述

为了在 Java 中访问字符串的单个字符，我们有 String.charAt(2).java中是否有任何内置函数可以删除字符串的单个字符?

For accessing individual characters of a String in Java, we have String.charAt(2). Is there any inbuilt function to remove an individual character of a String in java?

像这样:

if(String.charAt(1) == String.charAt(2){
   //I want to remove the individual character at index 2. 
}

推荐答案

您也可以使用可变的 StringBuilder 类.

You can also use the StringBuilder class which is mutable.

StringBuilder sb = new StringBuilder(inputString);

它有方法 deleteCharAt()，以及许多其他的mutator方法.

It has the method deleteCharAt(), along with many other mutator methods.

只需删除需要删除的字符，然后得到如下结果:

Just delete the characters that you need to delete and then get the result as follows:

String resultString = sb.toString();

这避免了创建不必要的字符串对象.

This avoids creation of unnecessary string objects.

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