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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  30. Write a program to find two lines with max characters in descending order.
  31. Write a program to find the sum of the first 1000 prime numbers.
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Knowledge Centre
Stream and types of Streams
A Stream is an abstraction that either produces or consumes information. There are two types of Streams and they are:

Byte Streams: Provide a convenient means for handling input and output of bytes. Byte Streams classes are defined by using two abstract classes, namely InputStream and OutputStream.

Character Streams: Provide a convenient means for handling input & output of characters. Character Streams classes are defined by using two abstract classes, namely Reader and Writer.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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