How can you split a given string and use its content as Integers in java

Question

I have an input of strings with numbers and I want to perform arithmetic operations on them

Answer 1

Use split() method of String class and Integer.parseInt() method.

Example :
public class Program
{
public static void main(String[] args) {
String str = "12 45 89 56 23";

String[] numbers = str.split("\\s+");

int sum = 0;
for(String number:numbers){
sum += Integer.parseInt(number);
}

System.out.println("Sum is "+sum);
}
}

split method takes a delimiter to split string.

"\\s+" - This is a regular expression to match 1 or more spaces.

\\s - match space

+ - match 1 or more occurances of preceding element.

Integer.parseInt() converts string to integer. If it's not convertible it'll throw NumberFormatException