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manvr · web-flow · commit 472bc9a8939d · 2020-05-14T08:50:51.000+05:30
diff --git a/FindSumOfNumbersApproachRegex.java b/FindSumOfNumbersApproachRegex.java
@@ -0,0 +1,33 @@
+package powerJavaLearning;
+
+public class FindSumOfNumbersApproachRegex {
+	/*Write a java code to find the sum of the given numbers 
+	Input: "asdf1qwer9as8d7" 
+	output: 1+9+8+7 = 25 */
+	public static void main(String[] args) {
+		String input ="asdf1qwer9as8d7";
+
+		//using charArray operation
+		System.out.println("logic using characterArray operation");
+		String numberFromString = input.replaceAll("\\D", "");
+		int sumAp1=0;
+		char[] charArray = numberFromString.toCharArray();
+		for (int i = 0; i < numberFromString.length(); i++) {
+			char charAt = charArray[i];
+			sumAp1 += Integer.parseInt(String.valueOf(charAt)); 
+		}
+		System.out.println("Sum of Integers "+sumAp1);
+
+
+		//using mathematical operation
+		System.out.println("logic using mathematical operation");
+		int number=Integer.parseInt(input.replaceAll("[^0-9]", ""));
+		int sumAp2=0;
+		while (number>0) {
+			sumAp2=sumAp2+number%10;
+			number=number/10;
+		}
+
+		System.out.println("Sum of Integers "+sumAp2);
+	}
+}
