/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main(String[] args) {
		System.out.println(contadorDeVirgulas("30,60,90"));
	}
 
	public static int contadorDeVirgulas (String parametroComVirgula) {
		String[] parametroSeparado;
		int count = 0;
 
		//método que separa as strings de acordo com padrão que vc deseja, no seu caso, a vírgula
		parametroSeparado = parametroComVirgula.split(",", 100);
 
		//parametroSeparado.length retorna o tamanho do array de String após a remoção das vírgulas
		//o -1 foi usado para retirar da contagem o primeiro valor (30), pois não há vírgula antes dele
		count = parametroSeparado.length - 1;
 
		//retorno do contador
		return count;
	}
}

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