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.