java - 替换字符串中特定索引处的字符？(Replace a character at a specific index in a string?)

Question

I'm trying to replace a character at a specific index in a string.

(我正在尝试替换字符串中特定索引处的字符。)

What I'm doing is:

(我正在做的是：)

String myName = "domanokz";
myName.charAt(4) = 'x';

This gives an error.

(这给出了一个错误。)

Is there any method to do this?

(有什么方法可以做到这一点？)

  ask by dpp translate from so

Answer 1

String are immutable in Java.

(字符串在Java中是不可变的。)

You can't change them.

(您不能更改它们。)

You need to create a new string with the character replaced.

(您需要创建一个新字符串并替换字符。)

String myName = "domanokz";
String newName = myName.substring(0,4)+'x'+myName.substring(5);

Or you can use a StringBuilder:

(或者，您可以使用StringBuilder：)

StringBuilder myName = new StringBuilder("domanokz");
myName.setCharAt(4, 'x');

System.out.println(myName);