在类X中找不到 main 方法怎么处理？

Question

import java.text.NumberFormat;

public class Account {
 private final double RATE = 0.035;
 private long acctNumber;
 private double balance;
 private String name;
 public  Account (String owner,long account,double initial) {
  name = owner;
  acctNumber = account;
  balance = initial;
 }
 public double deposit (double amount) {
  balance = balance + amount;
  return balance;
 }
 public double withdraw (double amount, double fee) {
  balance = balance - amount - fee;
  return balance;
 }
 public double addInterest() {
  balance+=(balance * RATE);
  return balance;
 }
 public double getBalance() {
  return balance;
 }
 public String toString()
 {
  NumberFormat fmt = NumberFormat.getCurrencyInstance();
  return acctNumber + "\t" + name + "\t" + fmt.format(balance);
 }

}

错误: 在类 study3.Account 中找不到 main 方法, 请将 main 方法定义为:
   public static void main(String[] args)
否则 JavaFX 应用程序类必须扩展javafx.application.Application

Answer 1

在当前类中写上一个main方法，main方法是Java应用程序的入口