Java unit converter help?

Does anyone know how to make a unit converter with java using if, else, else if; .equals?





For example:


2.0 miles equals:


321868.8 centimeters


3218.688 meters


3.218688 kilometers


|||I would pick a base unit to start. Then I would convert the entered number to the base unit and then to the desired one. For example, lets say you choose meters as the base unit.





First, I would define several constants to convert to meters.





static double KILOMETERS = 0.001;


static double CENTIMETERS = 100;


static double MILES = 0.00062;


static double INCHES = 39.37;





Then, declare the variables.





String start_type , end_type;


double start_value , base_value, end_value;





After storing the type of conversion, I would put the if-else statements to convert to the base.





if(start=="miles") {


base_value = MILES*start_value;


}


else if(start=="centimeters") {


base_value = CENTIMETERS*start_value;


}


...





Finally, put the if-else statements to convert to the end type.





if(end=="miles") {


end_value = 1/MILES * base_value;


}


else if(end=="centimeters") {


end_value = 1/CENTIMETERS * base_value;


}


...








Hope this helps. Good Luck.