Programming Fundamentals/Objects/Java

files.java

// This program creates instances of the Temperature class to convert Cesius 
// and Fahrenheit temperatures.

import java.util.*;

class objects 
{
    public static void main(String[] args) 
    {
        Temperature temp1 = new Temperature();
        temp1.setCelsius(100.0);
        System.out.println("temp1.celsius = " + temp1.getCelsius().toString());
        System.out.println("temp1.fahrenheit = " + temp1.getFahrenheit().toString());
        System.out.println("");
        
        Temperature temp2 = new Temperature();
        temp2.setFahrenheit(100.0);
        System.out.println("temp2.fahrenheit = " + temp2.getFahrenheit().toString());
        System.out.println("temp2.celsius = " + temp2.getCelsius().toString());
    }
}

// This class converts temperature between Celsius and Fahrenheit.
// It may be used by assigning a value to either Celsius or Fahrenheit 
// and then retrieving the other value, or by calling the ToCelsius or
// ToFahrenheit methods directly.

class Temperature
{
    Double celsius;
    Double fahrenheit;

    public Double getCelsius()
    {
        return celsius;
    }
    
    public void setCelsius(Double value)
    {
        celsius = value;
        fahrenheit = toFahrenheit(celsius);
    }

    public Double getFahrenheit()
    {
        return fahrenheit;
    }
    
    public void setFahrenheit(Double value)
    {
        fahrenheit = value;
        celsius = toCelsius(fahrenheit);
    }

    public Double toCelsius(Double fahrenheit)
    {
        return (fahrenheit - 32) * 5 / 9;
    }
    
    public Double toFahrenheit(Double celsius)
    {
        return celsius * 9 / 5 + 32;
    }
}

Try It

Copy and paste the code above into one of the following free online development environments or use your own Java compiler / interpreter / IDE.

• CodeChef
• GDB Online
• Ideone
• InterviewBit
• paiza.IO
• PythonTutor
• repl.it
• TutorialsPoint

See Also

• Wikibooks: Java Programming