Java - Count number of symbols in string

Question

Let's say I have this string:

String helloWorld = "One,Two,Three,Four!";

How can I make it so it counts the number of commas in String helloWorld?

Answer 1

the simplest way would be iterate through the String and count them.

int commas = 0;
for(int i = 0; i < helloWorld.length(); i++) {
    if(helloWorld.charAt(i) == ',') commas++;
}

System.out.println(helloWorld + " has " + commas + " commas!");

Answer 2

If you can import com.lakota.utils.StringUtils then it's so simple. Import this> import com.lakota.utils.StringUtils;

int count = StringUtils.countMatches("One,Two,Three,Four!", ",");
System.out.println("total comma "+ count);