I have following program to calculate Bank Transactions and I am having problem
ID: 3756905 • Letter: I
Question
I have following program to calculate Bank Transactions and I am having problem with print statement to two decimal place. i.e. Balance prints $1000.0 and should print $1000.00. Can you help?
package atmsimulator;
import java.util.Scanner;
/**
*
*/
public class AtmSimulator {
//initial balance and it is static so that it can be shared throughout program
static double balance=1000.00d;
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
while(true){
System.out.println("Enter the number of your desired transaction type:");
System.out.println("1. Balance 2. Deposit 3. Withdrawal 4. Quit");
int choice = scan.nextInt();
if (choice == 1){
System.out.println("Your current balance is $" +balance+".");
}
else if(choice == 2){
System.out.println("Enter the amount of the deposit:");
double deposit = scan.nextDouble();
balance = balance + deposit;
System.out.println("Your current balance is $" +balance+ ".");
}
else if(choice == 3){
System.out.println("Enter the amount of the withdrawal:");
double withdrawal = scan.nextDouble();
if(withdrawal <= balance){
balance = balance - withdrawal;
}
else{
System.out.println("Insufficient funds.");
}
System.out.println("Your current balance is $" +balance+ ".");
}
else if(choice == 4){
System.out.println("Good-bye.");
break;
}
}
}
}
Explanation / Answer
There are multiple ways to control output formatting, you can go with the use of String.format as the following:
Note: Let 1.9999 be the value we want to control the precision for upto 2 places after the decimal point.
String strDouble = String.format("%.2f", 1.9999);
System.out.println(strDouble); // --> This prints 2.00
you can change %.2f to include the required digits of precision.
Another way to do this is with DecimalFormat as the following:
You can explore the respective function for furthe details if required.