PatternSyntaxException while String split_Module 13_execise

Here is solution:

import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.xerces.impl.xpath.regex.Match;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class exerc3 {

static WebDriver d = null;

public static void main(String[] args) {

d = new FirefoxDriver();
d.manage().window().maximize();
d.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
d.navigate().to("http://www.americangolf.co.uk/golf-clubs/fairway-woods");

WebElement brand=d.findElement(By.xpath("//*[@id='secondary']/div[1]/div[3]/div"));
List<WebElement>brandlist=brand.findElements(By.tagName("a"));
System.out.println(brandlist.size());

for(int i=0;i<brandlist.size();i++){

System.out.println(i+")"+brandlist.get(i).getText());
}


String parta ="//*[@id='secondary']/div[1]/div[3]/div/ul/li[";
String partb="]/a/span[2]";
int k=1;
int totalvalue=0;

while(brandnumber(parta+k+partb)){

String number=d.findElement(By.xpath(parta+k+partb)).getText();
System.out.println(number);

String n = number.replaceAll( "[^\\d\\-]", "" ); // This line of code is used to replace all special characters in java
System.out.println(n);

int sum=Integer.parseInt(n);

totalvalue=totalvalue+sum;
k++;
}
System.out.println("Total sum of all brands is"+"---"+totalvalue);

String productcount=d.findElement(By.xpath("//*[@id='primary']/div[2]/div[1]/div[1]/span")).getText();

int productstotal=Integer.parseInt(productcount);

if(totalvalue==productstotal){

System.out.println(true);

} else {
System.out.println(false);
}

}

public static boolean brandnumber(String abc){

List<WebElement>a=d.findElements(By.xpath(abc));

if(a.size()==0)

return false;
else
return true;

}

}