// Written by William K Irvine // 6 February 2001 // Test Program for converting Celsius temperature to a Fahrenheit temperature // Once the output is given, the program prompts for another Celsius temp //-------------------------------------------------------------------- // Computes the Fahrenheit equivalent of a specific Celsius // value using the formula F = (9/5)C +32 //-------------------------------------------------------------------- import javax.swing.JOptionPane; public class TempConverter { public static void main( String args[] ) { // declare initial values String input = "", EXIT = "", zero = ""; int n = 0, exit = 9999, tooFew = -1000, tooMany = 5000;         int celsius; // input value double fahrenheit; // output value // get the input from the user input = JOptionPane.showInputDialog( "Enter the temperature in Celsius\n" + "OR (9999 to EXIT)"); // convert String to an Integer type value n = Integer.parseInt( input ); while( n != exit ) { if ( n <= tooFew || n >= tooMany ) { JOptionPane.showMessageDialog ( null, "Too Few or Too Many digits!, " + "\nPress OK and \nEnter Another temperature in Celsius", "Input Error", JOptionPane.ERROR_MESSAGE ); } else { //convert the String value to an integer celsius = Integer.parseInt( input ) ; // calculate the temperature in fahrenheit fahrenheit = ( celsius * (9.0 / 5.0 ) ) + 32 ; // display the results to the user JOptionPane.showMessageDialog( null, "Celsius Temperature: " + celsius + "\nFahrenheit Equivalent: " + fahrenheit, "Temperature", JOptionPane.INFORMATION_MESSAGE ); } { // Prompt user to enter Another Celsius value input = JOptionPane.showInputDialog ( "Enter Another temperature in Celsius\n OR (9999 to EXIT) " ); // convert String to an Integer type value n = Integer.parseInt( input ); } // end Second input statement } // end while loop System.exit ( 0 ); } // end main method } // end class