Create a new version of paste:

import java.util.Scanner;
 
public class RangeOverlap {
	public static void main(String[] args) 
	{
		/* 
		 * STEP 1
		 * Implement information message stating
		 * --------------------------------
		 * This program takes as an input the start and end limits of two integer ranges.
		 * It then prints out the value overlap and the percentage overlap between the ranges.
		 * -------------------------------- 
		 */
		
		//Variables:
		int firstRangeStart;
		int firstRangeEnd;
		int secondRangeStart;
		int secondRangeEnd;
		int firstRangeLength =0;
		int SecondRangeLength =0;
		int minRange;
		int maxRange;

		
		double overlap =0;
		double union;
		double percentOverlap;
		
	
		String menu;
		String percentOverlapFormatted;
		
		Scanner input = new Scanner(System.in);
		
		menu= """
				  --------------------------------
				  This program takes as an input the start and end limits of two integer ranges.
				  It then prints out the value overlap and the percentage overlap between the ranges.
				  -------------------------------- 				
						""";
		
		System.out.println(menu);
		
		/*
		 * STEP 2 - 4
		 * Gather user input and check for input correctness. Keep asking the user for input
		 * until they specify proper ranges (i.e. until the start limits of both ranges are 
		 * smaller or equal than the end ranges). 
		 */
		System.out.println("Please specify the start limit of your first range");
		// Take value from user
		firstRangeStart = input.nextInt();
		System.out.println("Please specify the end limit of your first range");
		// Take value from user
		firstRangeEnd = input.nextInt();
		System.out.println("Please specify the start limit of your second range");
		// Take value from user
		secondRangeStart = input.nextInt();
		System.out.println("Please specify the end limit of your second range");
		// Take value from user
		secondRangeEnd = input.nextInt();
		
		/* 
		 * Implement range summary message stating:
		 * --------------------------------
		 * You have specified the following ranges:
		 * 		Range 1: <RANGE_START - RANGE_END>
		 * 		Range 2: <RANGE_START - RANGE_END>
		 * --------------------------------
		 * 
		 * Note the tab indentation before the words "Range".
		 * See Examples 1-7 for how to format this summary.
		 */
		
		System.out.println("You have specified the following ranges:");
		System.out.println("Range 1: " + firstRangeStart + " - " + firstRangeEnd);
		System.out.println("Range 2: " + secondRangeStart + " - " + secondRangeEnd);
		
		
		/*
		 * Check range limits for correctness and display the following error message 
		 * if the ranges are incorrect.
		 *  --------------------------------
		 *  ERROR: Your input is incorrect.
		 *  Ensure that the start limit is smaller or equal than the end limit for both ranges.
		 *  --------------------------------
		 */
		
		
		
		/**
		
		To check for less than zero to make program more comprehensive
		* Will work on in the future
		if (firstRangeStart < 0 || secondRangeStart < 0 || firstRangeEnd < 0 || secondRangeEnd < 0) 
		{
			System.out.println("""
		   --------------------------------
		   ERROR: Your input is incorrect.
		   Ensure that your values are at least 0 or greater!
		   --------------------------------					
					""");
		}
		**/
		
		if (firstRangeStart > firstRangeEnd || secondRangeStart > secondRangeEnd) 
		{
			System.out.println("""
		   --------------------------------
		   ERROR: Your input is incorrect.
		   Ensure that the start limit is smaller or equal than the end limit for both ranges. 
		   --------------------------------						
					""");
		}
		

		
		//Gets range length
		
		for (int i = firstRangeStart; i <= firstRangeEnd; i++) 
		{
			firstRangeLength++;
		}
		
		for (int i = secondRangeStart; i <= secondRangeEnd; i++) 
		{
			SecondRangeLength++;
		}	
		System.out.println("firstRangeLength length: " + firstRangeLength);
		System.out.println("SecondRangeLength: length: " + SecondRangeLength);
		
		//Gets range min and max values between both ranges
		minRange = Math.min(firstRangeStart, secondRangeStart);
		System.out.println("minRange is: " + minRange);
		maxRange = Math.max(firstRangeEnd, secondRangeEnd);
		System.out.println("maxRange is: " + maxRange);
		
		/*
		 * STEP 5
		 * Calculate the value overlap between the two ranges *using loop structures*.
		 * 
		 * Your code goes here.
		 */		
		
		/**
		 In the event they NEVER overlap
		 Eg: 
		 [1-100], [5000,7000]
		 [2000-3000] , [100-200]
		 
		 **/
		
		if (firstRangeEnd < secondRangeStart || secondRangeEnd < firstRangeStart) 
		{
			System.out.println("The two ranges do not overlap.");
			overlap = 0;
		}else 
		{
			System.out.print("The overlap between the two ranges is: ");
			for (int i = firstRangeStart; i <= secondRangeEnd; i++) {
				System.out.print(i + " ");
				overlap++;
			}
			System.out.println("The overlap is: " + overlap);
		}			
		
		/* 
		 * 
		 * Display the value overlap to the user, or a message that the range is empty.
		 * For overlapping ranges, your output should read:
		 * 
		 * The overlap between the two ranges is: <RANGE>.
		 * 
		 * For non-overlapping ranges, your output should read:
		 * 
		 * The two ranges do not overlap.
		 * 
		 * See Examples 1-6 from the assignment for how to format your output for overlapping ranges.
		 * See Example 7 from the assignment for how to format your output for non-overlapping ranges. 
		 */
		
		/* 
		 * Your code goes here.
		 */
		

		// Calculate the percentage overlap between the two ranges.
		
		/*
		 * Your code goes here.
		 */
		
		union = (maxRange - minRange) == 0 ? 1 : (maxRange - minRange) + 1;
		System.out.println("The Union of Ranges:"+ union);
		
		
		
		/* Display the percentage overlap to the user.
		 * Your output should read:
		 * 
		 * The percentage overlap between the two ranges is: <PERCENT>
		 * 
		 * See Examples 1-7 from the assignment for how to format your output. 
		 */
		
		
		
		/**
//Test case example:		 
[10 to 20] 11 values eg: 10,11,12,13,14,  15,16,17,18,19, 20
[15 to 20] 6 values eg: 15,16,17,18,19,20

Overlap ie: intersection; values present in A and B would: 6
Union ie: values present in A or B: 11

Percent overlap formula: (Overlap/Union) * 100
Percent overlap eg:  (6/11) * 100 = 54.5%
		 
		 */
		
		/*
		 * Your code goes here.
		 */
		
		percentOverlap = (overlap / union) * 100;
		percentOverlapFormatted = String.format("%.1f", percentOverlap);
		System.out.println("\nThe percentage overlap between the two ranges is: " + percentOverlapFormatted + "%");	
	}
}