Decimal to roman numeral converter in java

Java program for Decimal to roman numeral converter. Here more solutions.

/*
  Java program for
  Conversion from Decimal to roman number
*/
public class Perform
{
	// Display roman value of n
	public static void result(int n)
	{
		switch (n)
		{
			// Test Cases
			case 1:
				System.out.print("I");
				break;
			case 4:
				System.out.print("IV");
				break;
			case 5:
				System.out.print("V");
				break;
			case 9:
				System.out.print("IX");
				break;
			case 10:
				System.out.print("X");
				break;
			case 40:
				System.out.print("XL");
				break;
			case 50:
				System.out.print("L");
				break;
			case 90:
				System.out.print("XC");
				break;
			case 100:
				System.out.print("C");
				break;
			case 400:
				System.out.print("CD");
				break;
			case 500:
				System.out.print("D");
				break;
			case 900:
				System.out.print("DM");
				break;
			case 1000:
				System.out.print("M");
				break;
		}
	}
	public static long select(long number, int[] collection, int size)
	{
		int n = 1, i = 0;
		for (i = 0; i < size; ++i)
		{
			if (number >= collection[i])
			{
				n = collection[i];
			}
			else
			{
				break;
			}
		}
		result(n);
		// Reduce the value of number
		return number - n;
	}
	public static void romanNo(long number)
	{
		if (number <= 0)
		{
			// When is not a natural number
			return;
		}
		// Base case collection
		int[] collection = {
			1,
			4,
			5,
			9,
			10,
			40,
			50,
			90,
			100,
			400,
			500,
			900,
			1000
		};
		// Get the size of collection
		int size = collection.length;
		System.out.print(" " + number + " : ");
		while (number > 0)
		{
			number = select(number, collection, size);
		}
        // Add new line
		System.out.println();
	}
	public static void main(String[] args)
	{
		// Test Case
		romanNo(10);
		romanNo(18);
		romanNo(189);
		romanNo(604);
		romanNo(982);
		romanNo(3000);
	}
}

Output

 10 : X
 18 : XVIII
 189 : CLXXXIX
 604 : DCIV
 982 : DMLXXXII
 3000 : MMM



Comment

Please share your knowledge to improve code and content standard. Also submit your doubts, and test case. We improve by your feedback. We will try to resolve your query as soon as possible.

New Comment







© 2022, kalkicode.com, All rights reserved