public void writeC()
{
switch(units)
{
case 'F':
case 'f':
convertedDegrees = 5 * (degrees -32)/9;
//Divide by 10.0 so division result is floating point
//(with one decimal place).
System.out.println("Temperature = " +
Math.round(convertedDegrees*10)/10.0 + " degrees Celsius.");
break;
case 'C':
case 'c':
System.out.println("Temperature = " + Math.round(degrees*10)/10.0
+ " degrees Celsius.");
break;
default:
System.out.println("Unknown units - cannot determine temperature.");
System.out.println("Next time enter either "
+ "'F' for Fahrenheit or 'C' for Celsius.");
}
}
//Method to display temperature in degrees F.
//Note that the temperature is rounded and
//displayed to one decimal place.
public void writeF()
{
switch(units)
{
case 'F':
case 'f':
System.out.println("Temperature = "
+ Math.round(degrees*10)/10.0 + " degrees Fahrenheit.");
break;
case 'C':
case 'c':
convertedDegrees = degrees * 9/5 + 32;
System.out.println("Temperature = " Math.round(convertedDegrees*10)/10.0
+ " degrees Fahrenheit.");
break;
default:
System.out.println("Unknown units - cannot determine temperature.");
System.out.println("Next time enter either "
+ "'F' for Fahrenheit or 'C' for Celsius.");
}
}
//Two methods to get (return) temperature value in either degrees C or F.
//Method to return temperature in degrees C.
//Returns value of variable degrees if units is an invalid character (other
//than c, C, f, or F).
public double getC()
{
CSJA1DP/203/0/2016
7
switch(units)
{
case 'F':
case 'f':
convertedDegrees = 5 * (degrees -32)/9;
return Math.round(convertedDegrees*10)/10.0;
case 'C':
case 'c':
return Math.round(degrees*10)/10.0;
default:
return Math.round(degrees*10)/10.0;
}
}
//Method to return temperature in degrees F.
//Returns value of variable degrees if units is an invalid character (other
//than c, C, f, or F).
public double getF()
{
switch(units)
{
case 'F':
case 'f':
return Math.round(degrees*10)/10.0;
case 'C':
case 'c':
convertedDegrees = degrees * 9/5 + 32;
return Math.round(convertedDegrees*10)/10.0;
default:
return Math.round(degrees*10)/10.0;
}
}
//Three methods to set (reset) the parameter values.
//Method to set both parameters.
//Postconditions: Does not guarantee legitimate value for
//units (allows any character, not just c, C, f, or F.
public void set(double newDegrees, char newUnits)
{
degrees = newDegrees;
units = newUnits;
}
//Method to set temperature only.
public void set(double newDegrees)
{
degrees = newDegrees;
}
//Method to set units only.
//Postconditions: Does not guarantee legitimate value for
//units (allows any character, not just c, C, f, or F.
public void set(char newUnits)
{
units = newUnits;
}
8
//Three comparison methods.
//Are two temperatures equal?
//Convert temperatures to an integer number of tenths of degrees
//to avoid errors due to comparing floating point numbers, which
//often cannot be stored in memory precisely.
public boolean equals(Temperature another)
{
//Use same units for comparison
return (Math.round(this.getC()*10)
== Math.round(another.getC()*10));
}
//Is one temperature greater than another?
//Convert temperatures to an integer number of tenths of degrees
//to avoid errors due to comparing floating point numbers, which
//often cannot be stored in memory precisely.
