Web Reference: The replaceFirst() method replaces the first match of a regular expression in a string with a new substring. Replacement strings may contain a backreference in the form $n where n is the index of a group in the pattern. The replaceFirst()method takes two parameters. 1. regex - a regex (can be a typical string) that is to be replaced 2. replacement - the first matching substring is replaced with this string Jul 23, 2025 · It consists of some patterns that can be planned and modified according to the usage of the program. In this article, we will discuss how to replace the first occurrence of a String using regex in Java.
YouTube Excerpt: Java Replace, ReplaceAll, ReplaceFirst Function / Methods
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