import java.io.*;
import java.util.*;

public class UnitConverter1{
	BufferedReader bf;
	public static void main (String[] args) throws Exception{
		UnitConverter1 Un = new UnitConverter1();
    }
	public UnitConverter1() throws Exception{
		bf = new BufferedReader(new InputStreamReader(System.in));
		int TableChoice;
		boolean done = false;
		while (!done) {
			TableChoice = runMenu();
			switch (TableChoice) {
				case 1:	System.out.println("convertGallonsToLtrs");
				convertGallonsToLtrs();
				break;
				case 2:	System.out.println("convertMetersToMiles");
				convertMetersToMiles();
				break;
				case 3:	System.out.println("convertGramsToCarats"); 
				convertGramsToCarats();
				break;
				case 4:	System.out.println("convertInchesToMtrs"); 
				convertInchesToMtrs();
				break;
				case 5:	System.out.println("convertLtrsToGallons"); 
				convertLtrsToGallons();
				break;
				case 6:	System.out.println("convertGmsTokgs"); 
				convertGmsTokgs();
				break;
				case 7:	System.out.println("convertCaratsToGrams"); 
				convertCaratsToGrams();
				break;
				default: System.out.println("Quiting..."); 
				System.exit(0);
				break;
			}
		}
	}
	
	public int runMenu() throws Exception{
		int TableChoice;
		System.out.println();
		System.out.println("Conversion Table:");
		System.out.println(" ");
		System.out.println("1. Gallons To Liters");
		System.out.println("2. Meters To Miles");
		System.out.println("3. Grams To Carats");
		System.out.println("4. Inches To Meters");
		System.out.println("5. Liters To Gallons");
		System.out.println("6. Grams To kilograms");
		System.out.println("7. Carats To Grams");
		System.out.println("8. Quit");
		System.out.println(" ");
		System.out.print("Choice: ");
		TableChoice = Integer.parseInt(bf.readLine());
		while (TableChoice < 1 || TableChoice > 8) {
			System.out.print("Invalid choice, try again: ");
			TableChoice = Integer.parseInt(bf.readLine());
		}
		System.out.println();
		return TableChoice;
	}
	
	public void convertGallonsToLtrs() throws Exception{
		System.out.print("Enter the Gallon:");
		int gallon = Integer.parseInt(bf.readLine());
		double liters = gallon * 3.7854118;
		System.out.println("Liters: " + liters);
	}
	
	public void convertMetersToMiles() throws Exception{
		System.out.print("Enter the Meters:");
		int meter = Integer.parseInt(bf.readLine());
		double miles = meter * 0.00062137119;
		System.out.println("Miles: " + miles);
	}
	
	public void convertGramsToCarats() throws Exception{
		System.out.print("Enter the Gram:");
		int gram = Integer.parseInt(bf.readLine());
		double carats = gram * 5;
		System.out.println("Carats: " + carats);
	}
	
	public void convertInchesToMtrs() throws Exception{
		System.out.print("Enter the Inches:");
		int inches = Integer.parseInt(bf.readLine());
		double meters = inches * 0.0254;
		System.out.println("Meters:" + meters);
	}

    public void convertLtrsToGallons() throws Exception{
		System.out.print("Enter the Liters:");
		int liter = Integer.parseInt(bf.readLine());
		double gallon = liter * 0.264172052358148;
		System.out.println("Gallons: " + gallon);
	}

	public void convertGmsTokgs() throws Exception{
		System.out.print("Enter the Grams:");
		int gram = Integer.parseInt(bf.readLine());
		double kilogram = gram * 0.001;
		System.out.println("kilogram: " + kilogram);
		}

	public void convertCaratsToGrams() throws Exception{
		System.out.print("Enter the Carat:");
		int carat = Integer.parseInt(bf.readLine());
		double gram = carat * 0.2;
		System.out.println("Gram:" + gram);
		}
}