我是JAVA的新手，正在编写一个JAVA代码，用于计算患者的费用。 如果用户喜欢计算另一名患者的费用，他会进入＆＃34; Y＆＃34;在提示符上，程序需要再次计算。
如何调用main（）让程序重新运行？
/*
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*/
package demo;
import java.util.Scanner;
/**
*
* @author seshasai
*/
public class PatientHospital {
public static void main(String[] args){
double totalCost = 0;
totalCost = costCalculator();
System.out.println("totalCosts " + totalCost);
tryAgain();
}
public static void tryAgain(){
String tryAgain;
System.out.println("Do you want to calculate cost for another patient (Y/N): ");
Scanner in = new Scanner (System.in);
tryAgain = in.next();
if(tryAgain.equalsIgnoreCase("Y")){
main();
}
}
public static double costCalculator(){
System.out.println("Enter YES if it is a day charge, NO if it is night charge");
Scanner i = new Scanner (System.in);
double totalCost =0;
String day = i.next();;
if (day.equalsIgnoreCase("YES")){
totalCost = dayCharges();
}else if (day.equalsIgnoreCase("NO")){
totalCost = overNightCharges();
}
return totalCost;
}
public static double overNightCharges(){
Scanner i = new Scanner (System.in);
System.out.println("Enter overnight, medication and labcosts");
double onCharges = i.nextDouble();
double medication = i.nextDouble();
double lab = i.nextDouble();
double totalFees = onCharges + medication + lab;
return totalFees;
}
public static double dayCharges(){
Scanner i = new Scanner (System.in);
System.out.println("Enter medication and labcosts");
double medication = i.nextDouble();
double lab = i.nextDouble();
double totalFees = medication + lab;
return totalFees;
}
}