Acceptez INTEGER UNIQUEMENT dans la déclaration If Else
package shipcost;
import java.io.*;
//Your class should be ShipCost (All words starting with uppercase)
public class ShipCost {
public static void main(String[] args) {
//Declare and initialize your variables first (with invalid values for your program)
double input = -1;
double total = 0;
String s1 = null;
//This will loop to prompt the user until the input is correct
while (true) {
try {
//try to execute the folowing lines
s1 = getInput("enter the item price");
input = Integer.parseInt(s1);
//If everything went fine, break the loop and move on.
break;
} catch (NumberFormatException e) {
//If the method Integer.parseInt throws the exception, cathc and print the message.
System.out.println("Not a valid input, please try again.");
}
}
if (input < 100) {
//What is this line exactly doing?
//double total = input += input * .02;
//This is better. If input less than 100, charge 2% over the price.
total = input * 1.02;
System.out.println(total);
//How can you return something from a void method (in this case main).
//The statement below will not compile
//return stdin.readLine();
} else {
//If greater than or equal to 100, do not charge shiping.
total = input;
System.out.println(total);
}
}
private static String getInput(String prompt) {
//Comment your code for your own good, it makes more readable and helps you in future ref.
BufferedReader stdin = new BufferedReader(
new InputStreamReader(System.in));
//Separate your line in chunks for commenting.
System.out.print(prompt);
System.out.flush();
try {
return stdin.readLine();
} catch (Exception e) {
return "Error: " + e.getMessage();
}
}
}
Gielyn Fernandez