Replace a character at a specific index in a string?

java string replace indexing character
dpp picture dpp · Aug 5, 2011 · Viewed 892.2k times · Source

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

What I'm doing is:

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

This gives an error. Is there any method to do this?

Answer

Petar Ivanov picture Petar Ivanov · Aug 5, 2011

String are immutable in Java. You can't change them.

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

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

Or you can use a StringBuilder:

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

System.out.println(myName);

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