#274 Write an interactive Java program, ColorRange.java

Write an interactive Java program, ColorRange.java - Computer Science

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Free Chegg Question

Write an interactive Java program, ColorRange.java, which when given a wavelength in nanometers will return the corresponding color in the visible spectrum.

You must implement the following using a suitable if decision statement.

1. Prompt the user to enter the wavelength, the wavelength should be of type double.

2. For each range (e.g. 380-450) the number on the left is included in the range, but the number on the right is not included in the range.

3. If the input value is not found on the visible spectrum then state that the wavelength is not within the visible spectrum.

4. Expected Output:

a. Enter a color code 630 The color is Red

b. Enter a color code 25.0 The entered wavelength is not a part of the visible spectrum

C. Enter a color code 750.5 The entered wavelength is not a part of the visible spectrum

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Free Chegg Answer

ColorRange.java

import java.util.Scanner;

public class ColorRange {
      
public static void main(String[] args) {
  
//Set scanner to get user input
Scanner sc = new Scanner(System.in);
//Ask user to enter wavelwength
System.out.println("Enter a color code:");
//Assign value to colorcode variable
double colorcode = sc.nextDouble();
//Put a msg 'Color is' and the concatenate with color
String msg = "Color is ";
  
if(colorcode>=380 && colorcode<450)
//here we used shorthand += operator to concatenate string
// OR you can use a simple method like msg = msg + "Violet"; also
msg += "Violet";
else if(colorcode>=450 && colorcode<495)
msg += "Blue";
else if(colorcode>=495 && colorcode<570)
msg += "Green";
else if(colorcode>=570 && colorcode<590)
msg += "Yellow";
else if(colorcode>=590 && colorcode<620)
msg += "Orange";
else if(colorcode>=620 && colorcode<750)
msg += "Red";
else
// If no conditions meet criteria then show this msg
msg = "The entered wavelength is not a part of the visible spectrum";
  
//print message
System.out.println(msg);
}
  
}