Temperature Conversion Program

This Temperature Conversion program is created for the request from fizkiz
Find fizkiz's request/specifications at:
https://www.blogger.com/comment.g?blogID=5133484865049964130&postID=7557509313208084077

/* >>and round to the nearest tenth of a degree
 * ????what does it mean... give example...
 */

class Temperature{
    float temperature_value;
    boolean isFarenheit=false;
/*
From Fahrenheit to Celsius:--
subtract 32
Divide by 9
multiply by 5.

From Celsius to Fahrenheit:--
multiply by 9
Divide by 5
add 32.
*/

    /*Default temperature_value is 0.0 and degree type is 'Celsius' */
    Temperature(float temperature_reading,char scale){
        temperature_value=temperature_reading;
        if(scale=='c' || scale=='C')
               isFarenheit=false;
        else if(scale=='F' || scale=='f')
               isFarenheit=true;
        else{
            System.out.println("Invalid Temperature scale type ..\n Exiting..");
            System.exit(0);
        }
    }
    Temperature(char scale){
        temperature_value=0;
        if(scale=='c' || scale=='C')
               isFarenheit=false;
        else if(scale=='F' || scale=='f')
               isFarenheit=true;
        else{
            System.out.println("Invalid Temperature scale type ..\n Exiting..");
            System.exit(0);
        }
    }
    Temperature(float temperature_reading){
        temperature_value=temperature_reading;
        isFarenheit=false;
    }
    Temperature(){
        temperature_value=0;
        isFarenheit=false;
    }
    public float getTemperatureInCelsius(){
        if(isFarenheit){
            return (toCelsius(temperature_value));
        }
        return temperature_value;
    }
    public float getTemperatureInFarenheit(){
        if(!isFarenheit){
            return (toFarenheit(temperature_value));
        }
        return temperature_value;
    }
    public float toCelsius(float t_val){
        return ((t_val-32)/9*5);
    }
    public float toFarenheit(float t_val){
        return (t_val*9/5+32);
    }
    public boolean isEqual(Temperature tobject){
        if(this.getTemperatureInCelsius()==tobject.getTemperatureInCelsius())
           return true;
        return false;
    }
    public boolean isGreater(Temperature tobject){
        if(this.getTemperatureInCelsius() > tobject.getTemperatureInCelsius())
           return true;
        return false;
    }
    public boolean isLesser(Temperature tobject){
        if(this.getTemperatureInCelsius() < tobject.getTemperatureInCelsius())
           return true;
        return false;
    }
}
public class TemperatureTest{

    java.util.Scanner sc;

    int readTemperature(){
        try{
            sc=new java.util.Scanner(System.in);
            System.out.println("Enter the temperature value:");
            return Integer.parseInt(sc.nextLine());
        }catch(Exception e){
            e.printStackTrace();
            System.out.println("Invalid input..");
            terminate();
        }
        return 0;
    }
    char readScale(){
        try{
            sc=new java.util.Scanner(System.in);
            System.out.println("Enter the Scale type, Enter C for celsius, F for Farenheit:");
            return sc.nextLine().charAt(0);
        }catch(Exception e){
            e.printStackTrace();
            System.out.println("Invalid input..");
            terminate();;
        }
        return 'C';
    }

    Temperature createNewInstance(){
        Temperature tempobject=new Temperature();
            System.out.println("Enter 1 to use constructor with temperature and scale type");
            System.out.println("Enter 2 to use constructor with temperature --default scale type is celsius");
            System.out.println("Enter 3 to use constructor with scale type --default temperature is 0");
            System.out.println("Enter 4 to use empty constructor --default temperature is 0 and default scale is celsius");
            System.out.println("Any other entry to Exit");
            try{
                sc=new java.util.Scanner(System.in);
                int option=Integer.parseInt(sc.nextLine());
                switch (option){
                   case 1:
                       tempobject=new Temperature(readTemperature(),readScale());
                          break;
                   case 2:
                       tempobject=new Temperature(readTemperature());
                          break;
                   case 3:
                       tempobject=new Temperature(readScale());
                          break;
                   case 4:
                       tempobject=new Temperature();
                          break;
                   default:
                          terminate();
                          break;
                }
            }catch(Exception e){ terminate(); }
            return tempobject;
    }

    TemperatureTest(){
        Temperature t1,t2;
        while(true){
            try{
                t1=createNewInstance();
                System.out.println("Enter 6 to read temperature in Celsius");
                System.out.println("Enter 7 to read temperature in Farenheit");
                System.out.println("Enter 8 to create new Temperature object so you can compare" +
                "\n their temperatures..");
                System.out.println("Any other entry to Exit");
                sc=new java.util.Scanner(System.in);
                int option=Integer.parseInt(sc.nextLine());
                switch (option){
                   case 6:
                          System.out.println(" Temperature in Celsius is:"+t1.getTemperatureInCelsius());
                          break;
                   case 7:
                          System.out.println(" Temperature in Farenheit is:"+t1.getTemperatureInFarenheit());
                          break;
                   case 8:
                          t2=createNewInstance();
                          compareTwoObjects(t1,t2);
                          break;
                   default:
                          terminate();
                          break;
                }
                System.out.println("-------------------------------------------------------");
            }catch(Exception e){ terminate();  }
        }
    }

    void compareTwoObjects(Temperature t1,Temperature t2){
        //Equal comparision
        if(t1.isEqual(t2))System.out.println("Both are Equal..");
        //Lesser than comparision
        if(t1.isLesser(t2))System.out.println("First Temperature is Lesser than second Temperature");
        //Greater than comparision
        if(t1.isGreater(t2))System.out.println("First Temperature is Greater than second Temperature");
    }

    void terminate(){
                System.out.println("Terminating..");
                System.exit(0);
    }
    public static void main(String args[]){
        new TemperatureTest();
    }
}