5.13: Java Examples
- Page ID
- 10666
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// This program displays a temperature conversion table showing Fahrenheit
// temperatures from 0 to 100, in increments of 10, and the corresponding
// Celsius temperatures using While, Do While, and For loops.
//
// References:
// https://www.mathsisfun.com/temperature-conversion.html
// https://en.wikibooks.org/wiki/Java_Programming
import java.util.*;
class Main
{
public static void main(String[] args) {
whileLoop();
doLoop();
forLoop();
}
private static void whileLoop() {
double fahrenheit;
double celsius;
displayHeading();
fahrenheit = 0;
while (fahrenheit <= 100) {
celsius = calculateCelsius(fahrenheit);
displayResult(fahrenheit, celsius);
fahrenheit += 10;
}
System.out.println();
}
private static void doLoop() {
double fahrenheit;
double celsius;
displayHeading();
fahrenheit = 0;
do {
celsius = calculateCelsius(fahrenheit);
displayResult(fahrenheit, celsius);
fahrenheit += 10;
} while (fahrenheit <= 100);
System.out.println();
}
private static void forLoop() {
double fahrenheit;
double celsius;
displayHeading();
for (fahrenheit = 0 ; fahrenheit <= 100 ; fahrenheit += 10) {
celsius = calculateCelsius(fahrenheit);
displayResult(fahrenheit, celsius);
}
System.out.println();
}
private static void displayHeading() {
System.out.println("F°\tC°");
}
private static double calculateCelsius(double fahrenheit) {
double celsius;
celsius = (fahrenheit - 32) * 5 / 9;
return celsius;
}
private static void displayResult(double fahrenheit, double celsius) {
System.out.println(String.valueOf(fahrenheit) + "\t" + String.valueOf(celsius));
}
}
Output
F° C° 0.0 -17.77777777777778 10.0 -12.222222222222221 20.0 -6.666666666666667 30.0 -1.1111111111111112 40.0 4.444444444444445 50.0 10.0 60.0 15.555555555555555 70.0 21.11111111111111 80.0 26.666666666666668 90.0 32.22222222222222 100.0 37.77777777777778 F° C° 0.0 -17.77777777777778 10.0 -12.222222222222221 20.0 -6.666666666666667 30.0 -1.1111111111111112 40.0 4.444444444444445 50.0 10.0 60.0 15.555555555555555 70.0 21.11111111111111 80.0 26.666666666666668 90.0 32.22222222222222 100.0 37.77777777777778 F° C° 0.0 -17.77777777777778 10.0 -12.222222222222221 20.0 -6.666666666666667 30.0 -1.1111111111111112 40.0 4.444444444444445 50.0 10.0 60.0 15.555555555555555 70.0 21.11111111111111 80.0 26.666666666666668 90.0 32.22222222222222 100.0 37.77777777777778