Split the String on second time if exist and otherwise split on the first time-CodePudding

Hi i have a string "I am Anna. I am from California". I want to cut the string at second "am", if second "am" exist.otherwise i want to split at first "am". I am now using split method and tried pattern matching. Please help

   String mydata = "I am Anna. I am from California";
    Pattern pattern = Pattern.compile("I(.*?) A");
    Matcher matcher = pattern.matcher(mydata);
    if (matcher.find())
    {
        System.out.println(matcher.group(1));
    }

CodePudding user response：

Split after am where there are no occurrences of am in the remaining input:

String[] parts = mydata.split("(?<=\\bam\\b)(?!.*\\bam\\b)");

If you just want the first part:

String intro = mydata.split("(?<=\\bam\\b)(?!.*\\bam\\b)")[0];