How can I replace a substring within a string in Java?

In Java, you can replace a substring within a string using the replace() or replaceAll() methods, depending on your needs:

Using replace():

This method replaces all occurrences of a specific substring with another substring. It works with literal strings and characters,

Using replaceAll():

This method replaces all occurrences of a pattern that matches a regular expression with a specified substring. Use this when you need to work with regex patterns.

Using replaceFirst():

If you want to replace only the first occurrence of a substring or match a pattern using a regular expression, you can use this method.

These methods allow you to modify strings efficiently, whether you’re replacing literal text or using complex patterns.