<java>设计一个Account类

设计一个Account类。Java。不知道为啥运行不出来啊啊啊啊啊啊。。。。。。

找不到或无法加载主类 ComputerAvg    我也搞不懂是怎么回事，尝试了好几种方法都没有用诶。

/**
 * 设计一个Account类，（课本P306页，9.7）包括：
 * 一个名为id的int类型私有数据域（默认值为0）
 * 一个名为balance的double类型的私有数据域（默认值为0）
 * 一个名为annualInterestRate的double类型私有数据域存储当前利率（默认值为0）.假设所有的账户都有相同的利率
 * 一个名为deteCreated的Date类型的私有数据域，存储账户的开户日期
 * 一个用于创建默认账户的无参构造方法
 * 一个用于创建带特定id和初始余额的账户的构造方法
 * id、balance和annualInterestRate的访问器和修改器
 * dateCreated的访问器
 * 一个名为getMonthlyInterestRate（）的方法、返回月利率
 * 一个名为withDraw的方法，从账户提取特定数额
 * 一个名为deposit的方法向账户存储特定数额
 * @author 王沐风
 *
 */
import java.sql.Date;
import java.util.Scanner;
public class AccountClass {
	//名为id的int类型的私有数据域,账户
	private int id=0;
	//名为balance的double类型的私有数据域，余额
	private double balance=0;
	//名为annualInterstRate的double类型的私有数据域,利率
	private double annualInterestRate=0;
	//名为dateCreate的Date类型的私有数据域
	private Date dateCreate;
	//用于创建默认账户的无参构造方法
	public AccountClass(){
	}
	//用于创建带特定id和初始余额的账户的构造方法
	public AccountClass(int id,double balance){
		this.id = id;
		this.balance=balance;
	}
	
	//id、balance和annualInterestRate的访问器和修改器
	public int getid(){
		return id;
	}
	public void setid(int id){
		this.id=id;
	}
	public double getbalance(){
		return balance;
	}
	public void setbalance(double balance){
		this.balance=balance;
	}
	public double getannualInterstRate(){
		return annualInterestRate;
	}
	public void setannualInterstRate(double annualInterstRate){
		this.annualInterestRate=annualInterstRate;
	}
	
	//dateCreated的访问器
	public Date dateCreate(){
		return dateCreate;
	}
	
	//一个名为getMonthlyInterestRate（）的方法、返回月利率
	public double MonthlyInterestRate(){
		double Monthly=0;
		if(0==annualInterestRate){
			System.out.println("Your annualInterestRate have not set:");
		}else{
			Monthly=annualInterestRate/12;
		}
		return Monthly;
	}
	
	//名为withDraw的方法，从账户提取特定数额
	public void withDraw(double Money){
		if(Money<=balance){
			this.balance=getbalance()-Money;
		}else{
			System.out.println("Sorry,your balance have not so much balance!");
		}
	}
	
	//名为deposit的方法向账户存储特定数额
	public void deposit(double money){
		if(0!=money){
			this.balance=getbalance()+money;
		}else{
			System.out.println("Please enter effective!");
		}
	}
	
	//测试
	public void main(String[] args){
		AccountClass myaccount=new AccountClass();//(170321,10000);
		myaccount.setid(321);//修改id
		int id=getid();//修改id
		myaccount.setbalance(10000);
		double balance=getbalance();//修改账户余额
		System.out.println("The id of myaccount is "+id+" the balance is "+balance);
		
		Date date=myaccount.dateCreate();//访问账户日期
		System.out.println("The date of create id is "+date);
		
		setannualInterstRate(0.0045);//修改年利率，返回年利率
		double annualInterstRate=myaccount.getannualInterstRate();
		System.out.println("The annualInterestRate is "+annualInterstRate);
		
		double Monthly=myaccount.getbalance();//返回月利率
		System.out.println("The monthlyannualInterestRate is "+Monthly);
		
		System.out.println("Please enter the money of withDraw :");
		Scanner input = new Scanner(System.in);
		double money=input.nextDouble();
		myaccount.withDraw(money);//取钱
		System.out.println("The balance is "+balance);
		
		System.out.println("Please enter the money of deposite :");
		Scanner input1 = new Scanner(System.in);
		double moneydeposite=input1.nextDouble();
		myaccount.deposit(moneydeposite);
		System.out.println("The balance is "+balance);
		
	}
	
}