JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Write a program to find sum of each digit in the given number using recursion.


Description:

Below example shows how to find out sum of each digit in the given number using recursion logic. For example, if the number is 259, then the sum should be 2+5+9 = 16.


Code:
package com.java2novice.algos;

public class MyNumberSumRec {

	int sum = 0;
	
	public int getNumberSum(int number){
		
		if(number == 0){
			return sum;
		} else {
			sum += (number%10);
			getNumberSum(number/10);
		}
		return sum;
	}
	
	public static void main(String a[]){
		MyNumberSumRec mns = new MyNumberSumRec();
		System.out.println("Sum is: "+mns.getNumberSum(223));
	}
}

Output:
Sum is: 7
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Knowledge Centre
What is fail-fast in java?
A fail-fast system is nothing but immediately report any failure that is likely to lead to failure. When a problem occurs, a fail-fast system fails immediately. In Java, we can find this behavior with iterators. Incase, you have called iterator on a collection object, and another thread tries to modify the collection object, then concurrent modification exception will be thrown. This is called fail-fast.

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Reference: Java™ Platform Standard Ed. 6 - API Specification | Java is registered trademark of Oracle.
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