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Java String Exercises: Calculate the sum of the numbers appear in a given string

Java String: Exercise-89 with Solution

Write a Java program to calculate the sum of the numbers appear in a given string.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public int sumOfTheNumbers(String stng) 
{
  int l = stng.length();
  int sum = 0;
  String temp = "";
  for (int i = 0; i < l; i++) 
  {
    if (Character.isDigit(stng.charAt(i))) 
	{
      if (i < l-1 && Character.isDigit(stng.charAt(i+1))) 
	  {
        temp += stng.charAt(i);
      }
      else 
	  {
        temp += stng.charAt(i);
        sum += Integer.parseInt(temp);
        temp = "";
      }
    }
  }
  return sum;
}

public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "it 15 is25 a 20string";
      System.out.println("The given string is: "+str1);
      System.out.println("The sum of numbers in the string is: "+m.sumOfTheNumbers(str1));
	  }
}

Sample Output:

The given string is: it 15 is25 a 20string
The sum of numbers in the string is: 60

Pictorial Presentation:

Java String Exercises: Calculate the sum of the numbers appear in a given string

Flowchart:

Flowchart: Java String Exercises -Calculate the sum of the numbers appear in a given string

Java Code Editor:

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Next: Write a Java program to check the number of appearances of the two substrings appear anywhere in the string.

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Java: Tips of the Day

Count the number of occurrences of a char in a String:

int count = StringUtils.countMatches("a.b.c.d", ".");

Ref: https://bit.ly/2OTy6sG