Java 计算一个字符串中所有数字的和

public class Homework{

 

public static void main(String[]args){

String a = "ja456va p5465hp java458script <div>465</div>";

 Pattern s = Pattern.compile("\\d+");

Matcher n = s.matcher(a);

int sum = 0;

while (n.find()){

int num = Integer.valueOf(n.group());

sum +=num;

}

System.out.println(sum);

}

}