String replace methods example

String replace methods are used to replace a part of string with a new string.
We have 4 variations for replace in String

String replace(char oldChar, char newChar) returns a new String with the oldChar replaced with a newChar that was specified.

String replace(CharSequence target, CharSequence replacement) returns a new String by replacing a sequence of characters that are specified.

String replaceAll(String regex, String replacement) returns a new String by replacing all the matching regular expression with a new replacement String.

String replaceFirst(String regex, String replacement) returns a new String by replacing only the first matching regular expression with a new replacement String.

String replace methods example

1. replace() example

Output

2. replaceAll() example

Output

3. replaceFirst() example

Output

Reference

1. String API