String replaceFirst (String regex, String replace): This method replaces the first substring in the invoking string that matches the given regular expression with the specified replacement string replace. For example,
It will replace the first occurrence of substring is with the substring was in the given string.
public class StringReplaceFirst
public static void main(String args)
String str3 = "Where there is a Will , there is a way";
System.out.println("str3.replaceFirst(\"is\" ,\"was\") = " +str3.replaceFirst("is" ,"was"));