Thread: Problem with looping

I'm a beginner in Java and I wanted to create a program where I can convert from celsius to fahrenheit but I need to be able to read and process data from a text file also. The text file has 5 lines of text each with different numeric values and when I run my program I'm only able to do a conversion for the first line of text. I know that I should be able to get my program to read all of the lines and do the calculations with a loop but I'm not sure how to do it. Any suggestions would be helpful. Here is my code so far:

import java.util.Scanner;
import java.io.*;
 
public class CToFConversion {
 
		char symbol = '\u00B0'; // this is the unicode "degree" symbol
		Scanner myScanner= new Scanner("tempdata.txt");
 
		public void readFile(String file_name) {
		try{
			 File file = new File(file_name);
			 Scanner myScanner= new Scanner(file);
			 double celsius = myScanner.nextDouble();
			 double Fahrenheit = 9.0 / 5 * (celsius + 32);
			 System.out.print(celsius + " Celsius is" + " Fahrenheit ");
			 System.out.printf("%5.1f", Fahrenheit);	
 
		while(myScanner.hasNextLine()){
			 System.out.println(myScanner.nextLine());	
			}
 
		}catch(Exception ex){
			 System.out.println(ex.getMessage());
			 System.exit(0);
		}
 
	}
}

I also used another class to run this program, this is the code for that:

import java.io.*;
 
public class CToFConversionLoop {
 
	public static void main(String[] args) throws IOException {
 
		CToFConversion conversion = new CToFConversion();
		conversion.readFile("tempdata.txt");String file_name = "tempdata.txt";	
 
	}
}

The text file has 5 lines:
0.0
33.3
100.0
-10.0
-273.0

This is the result when it executes:

0.0 Celsius is Fahrenheit 57.6
33.3
100.0
-10.0
-273.0

I've put the values used to do the calculations in the loop but for the first line of the text file it skips it. Is there a different method I should use instead of nextLine? This is the code:

import java.util.Scanner;
import java.io.*;
 
public class CToFConversion {
 
		char symbol = '\u00B0'; // this is the unicode "degree" symbol
		Scanner myScanner= new Scanner("tempdata.txt");
 
		public void readFile(String file_name) {
		try{
			 File file = new File(file_name);
			 Scanner myScanner= new Scanner(file);	
 
		while(myScanner.hasNextLine()){
			 System.out.println(myScanner.nextLine());
			 double celsius = myScanner.nextDouble();
			 double Fahrenheit = 9.0 / 5 * (celsius + 32);
			 System.out.print(celsius + " Celsius is" + " Fahrenheit ");
			 System.out.printf("%5.1f", Fahrenheit);	
			}
 
		}catch(Exception ex){
			 System.out.println(ex.getMessage());
			 System.exit(0);
		}
 
	}
}

This is my output:
0.0
33.3 Celsius is Fahrenheit 117.5
100.0 Celsius is Fahrenheit 237.6
-10.0 Celsius is Fahrenheit 39.6
-273.0 Celsius is Fahrenheit -433.8