I've been assigned a temperature conversion assignment that requires values to be printed next to each other, using two static methods and a single System.out.print statement. For reference, I've added an image of the intended result.
This is everything I've written so far:
package main;
public class TempConversion {
static double cel;
static double fah;
public static void convCel(double cel) {
String verticle;
double temp;
cel = -40;
verticle = "|";
System.out.println("\tTemperature \n\t (degrees) ");
System.out.print(" F \t\t C");
System.out.println();
for (cel = -40; cel <= 455; cel += 5) {
if (cel <= 455) {
System.out.printf("%7.3f ", cel);
if (cel <= 455) {
temp = (cel - 32) * 5 / 9;
System.out.printf("\t %7.3f ", temp);
System.out.print(verticle);
}
}
System.out.println();
}
}
public static void convFah(double fah) {
double temp;
fah = -40;
System.out.println("\tTemperature \n\t (degrees) ");
System.out.print(" C \t\t F");
System.out.println();
for (fah = -40; fah <= 455; fah += 5) {
if (fah <= 455) {
System.out.printf("%7.3f ", fah);
if (fah <= 455) {
temp = (fah * 9 / 5) + 32;
System.out.printf("\t %7.3f ", temp);
}
}
System.out.println();
}
}
public static void main(String[] args) {
System.out.print(" Temperature Conversion Table \n");
System.out.println();
convCel(cel);
convFah(fah);
}
}
The end result prints one loop after the other and I can't seem to find any other way that doesn't end in errors.
I'm trying to achieve the intended result as displayed in the image above. So far, I'm able to print the values, just not next to each other.
I've been assigned a temperature conversion assignment that requires values to be printed next to each other, using two static methods and a single System.out.print statement. For reference, I've added an image of the intended result.
This is everything I've written so far:
package main;
public class TempConversion {
static double cel;
static double fah;
public static void convCel(double cel) {
String verticle;
double temp;
cel = -40;
verticle = "|";
System.out.println("\tTemperature \n\t (degrees) ");
System.out.print(" F \t\t C");
System.out.println();
for (cel = -40; cel <= 455; cel += 5) {
if (cel <= 455) {
System.out.printf("%7.3f ", cel);
if (cel <= 455) {
temp = (cel - 32) * 5 / 9;
System.out.printf("\t %7.3f ", temp);
System.out.print(verticle);
}
}
System.out.println();
}
}
public static void convFah(double fah) {
double temp;
fah = -40;
System.out.println("\tTemperature \n\t (degrees) ");
System.out.print(" C \t\t F");
System.out.println();
for (fah = -40; fah <= 455; fah += 5) {
if (fah <= 455) {
System.out.printf("%7.3f ", fah);
if (fah <= 455) {
temp = (fah * 9 / 5) + 32;
System.out.printf("\t %7.3f ", temp);
}
}
System.out.println();
}
}
public static void main(String[] args) {
System.out.print(" Temperature Conversion Table \n");
System.out.println();
convCel(cel);
convFah(fah);
}
}
The end result prints one loop after the other and I can't seem to find any other way that doesn't end in errors.
I'm trying to achieve the intended result as displayed in the image above. So far, I'm able to print the values, just not next to each other.
Share Improve this question edited Jan 18 at 11:02 Jens 69.5k15 gold badges103 silver badges130 bronze badges asked Jan 18 at 9:38 TheNomadTheNomad 11 silver badge 5 |2 Answers
Reset to default 4First you have to determine how the output will look. In order to do that, I open a text editor (in my case it was Notepad). I determine the maximum value that will appear in the conversion table and then write a single row of the table with the maximum values. I add the | separator and then format the row the way I want it to look. Then I add in the headings and format them also according to the way I want it to look. This is how my Notepad looks.
(Note that the | in front of -123.456 is the cursor and is not part of the text.)
Now I can start to code.
The headings are constant strings so I just copy them from Notepad to my Java IDE (in my case Eclipse) and put them in a System.out.println() call.
What remains is to print the contents of the conversion table. I need to print both conversions, i.e. Fahrenheit-to-Celsius and Celsius-to-Fahrenheit, on the same line, so I need to perform both calculations in a single iteration of a single loop.
public class TempConversion {
private static void printTemperatureConversionTable() {
System.out.println(" Temperature Conversion Tables");
System.out.println();
System.out.println();
System.out.println(" Temperature | Temperature");
System.out.println(" (degrees) | (degrees)");
System.out.println(" F C | C F");
double celsius;
double fahrenheit;
for (int degrees = -40; degrees <= 65; degrees += 5) {
fahrenheit = degrees;
celsius = convertFahrenheitToCelsius(fahrenheit);
System.out.printf("% 7.3f % 8.3f | ", fahrenheit, celsius);
celsius = degrees;
fahrenheit = convertCelsiusToFahrenheit(celsius);
System.out.printf("% 7.3f % 8.3f", celsius, fahrenheit);
System.out.println();
}
}
private static double convertCelsiusToFahrenheit(double celsius) {
return (celsius * 9.0 / 5.0) + 32.0;
}
private static double convertFahrenheitToCelsius(double fahrenheit) {
return (fahrenheit - 32.0) * 5.0 / 9.0;
}
public static void main(String[] args) {
printTemperatureConversionTable();
}
}
When I run the above code, I get the following output:
Temperature Conversion Tables
Temperature | Temperature
(degrees) | (degrees)
F C | C F
-40.000 -40.000 | -40.000 -40.000
-35.000 -37.222 | -35.000 -31.000
-30.000 -34.444 | -30.000 -22.000
-25.000 -31.667 | -25.000 -13.000
-20.000 -28.889 | -20.000 -4.000
-15.000 -26.111 | -15.000 5.000
-10.000 -23.333 | -10.000 14.000
-5.000 -20.556 | -5.000 23.000
0.000 -17.778 | 0.000 32.000
5.000 -15.000 | 5.000 41.000
10.000 -12.222 | 10.000 50.000
15.000 -9.444 | 15.000 59.000
20.000 -6.667 | 20.000 68.000
25.000 -3.889 | 25.000 77.000
30.000 -1.111 | 30.000 86.000
35.000 1.667 | 35.000 95.000
40.000 4.444 | 40.000 104.000
45.000 7.222 | 45.000 113.000
50.000 10.000 | 50.000 122.000
55.000 12.778 | 55.000 131.000
60.000 15.556 | 60.000 140.000
65.000 18.333 | 65.000 149.000
I didn't realize we were providing solutions to homework problems and not just hints.
As I said in my comment, break the problem into steps. The requirements state to use two methods and one System.out.print statement. The System.out.print statement goes in one method. It prints a String. Therefore, the other method creates the strings for printing.
Here are the test results from one of my tests,
Temperature Conversion Tables
Temperature | Temperature
(degrees) | (degrees)
F C | C F
-40.000 -40.000 | -40.000 -40.000
-35.000 -37.222 | -35.000 -31.000
-30.000 -34.444 | -30.000 -22.000
-25.000 -31.667 | -25.000 -13.000
-20.000 -28.889 | -20.000 -4.000
-15.000 -26.111 | -15.000 5.000
-10.000 -23.333 | -10.000 14.000
-5.000 -20.556 | -5.000 23.000
0.000 -17.778 | 0.000 32.000
5.000 -15.000 | 5.000 41.000
10.000 -12.222 | 10.000 50.000
15.000 -9.444 | 15.000 59.000
20.000 -6.667 | 20.000 68.000
25.000 -3.889 | 25.000 77.000
30.000 -1.111 | 30.000 86.000
35.000 1.667 | 35.000 95.000
40.000 4.444 | 40.000 104.000
45.000 7.222 | 45.000 113.000
50.000 10.000 | 50.000 122.000
55.000 12.778 | 55.000 131.000
60.000 15.556 | 60.000 140.000
65.000 18.333 | 65.000 149.000
70.000 21.111 | 70.000 158.000
75.000 23.889 | 75.000 167.000
80.000 26.667 | 80.000 176.000
85.000 29.444 | 85.000 185.000
90.000 32.222 | 90.000 194.000
95.000 35.000 | 95.000 203.000
100.000 37.778 | 100.000 212.000
I formatted one table line to see how long it was. It turned out to be 60 characters, which made creating the header lines easier.
I created one header line at a time so I could get the spacing correct.
Here's the complete runable code. Two methods and one System.out.print statement.
public class TempertureConversion {
public static void main(String[] args) {
String formatter = "%15.3f";
String title = " ".repeat(21) + "Temperature Conversion Tables";
String blankLine = "";
String subtitle1 = " ".repeat(13) + "Temperature"
+ " | " + "Temperature";
String subtitle2 = " ".repeat(13) + " (degrees) "
+ " | " + " (degrees) ";
String subtitle3 = " ".repeat(11) + "F" + " ".repeat(14) + "C"
+ " | " + "C" + " ".repeat(14) + "F";
printLine(title);
printLine(blankLine);
printLine(subtitle1);
printLine(subtitle2);
printLine(subtitle3);
for (int value = -40; value <= 100; value += 5) {
double initial = value;
double celsius = (initial - 32.0) * 5.0 / 9.0;
double fahrenheit = initial * 9.0 / 5.0 + 32.0;
String valueString = String.format(formatter, initial);
String celsiusString = String.format(formatter, celsius);
String fahrenheitString = String.format(formatter, fahrenheit);
String output = valueString + celsiusString + " |" + valueString
+ fahrenheitString;
printLine(output);
}
}
private static void printLine(String line) {
System.out.println(line);
}
}
System.out.printstatements. The requirements are two methods and oneSystem.out.printstatement. TheSystem.out.printstatement should print aString, which you create. Start by just printing the table header. Once that's correct, try printing one line of the table. Once that's correct, try putting in a while loop to print all the table values. Do one small step at a time. – Gilbert Le Blanc Commented Jan 18 at 10:23