ReplaceAll Method from Matcher
import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static void main(String args[]) { Pattern p = Pattern.compile("(i|I)ce"); String candidateString = "ice Ice Ice."; Matcher matcher = p.matcher(candidateString); String tmp = matcher.replaceAll("Java"); System.out.println(tmp); } }