bankusst.java

JAVA自编的银行管理程序。功能粗糙了点

import java.io.*;
import java.util.Vector;
import java.math.*;

abstract class Account{
	private String type;
	private double balance;
	private int accountNum;
	private Vector transactions=new Vector();
	public Account(String i,double j,int k){
		type=i;
		balance=j;
		accountNum=k;
	}
	public double getBalance(){
		return balance;
	}
	public int getAccountNum(){
		return accountNum;
	}
	public String getType(){
		return type;
	}
	public void addTransaction(Transaction k){
		transactions.addElement(k);
	}
	public void setBalance(double num){
		balance=num;
	}
	public void deposit(double num){
		balance=balance+num;
	}
	public abstract void withDrawal(double num);
	public abstract void displayAccountDetails();
	public void displayAccount(){
		System.out.print("Account's info is... Type:"+type+" balance:"+balance+" accountNum:"+accountNum);
	}
	public void displayAllTransactions(){
		for (int i=0;i<transactions.size();i++){
		Transaction transactionFromVector=(Transaction)transactions.elementAt(i);
		transactionFromVector.displayDetails();}
	}
}

class CurrentAccount extends Account{
	private int creditLimit;
	public CurrentAccount(String i,double j,int k,int m){
		super(i,j,k);
		creditLimit=m;
	}
	public void displayAccountDetails(){
		super.displayAccount();
		System.out.println(" creditLimit:"+creditLimit);
	}
	public void withDrawal(double num){
		if (super.getBalance()-num>=creditLimit){
			super.setBalance(super.getBalance()-num);}
		else {System.out.println("Warning, you can't get any more money...");}
	}
}

class SavingAccount extends Account{
	private double interestRate;
	public SavingAccount(String i,double j,int k,double m){
		super(i,j,k);
		interestRate=m;
	}
	public void displayAccountDetails(){
		super.displayAccount();
		System.out.println(" interestRate:"+interestRate+" you got "+calInterestRate()+" interest");
	}
	public double calInterestRate(){
		double result;
		result=super.getBalance()*this.interestRate;
		return result;
	}
	public void withDrawal(double num){
		if (super.getBalance()-num>=0){
			super.setBalance(super.getBalance()-num);}
		else {System.out.println("Sorry, not enough money in your account...");}
	}
}

class Customer{
	private String name;
	private String address;
	private Vector Accounts=new Vector();
	
	public Customer(String i,String j){
		name=i;
		address=j;
	}
	public void addAccount(Account k){
		Accounts.addElement(k);
	}
	public void displayAll(){
		System.out.println("Customer info is... name:"+name+" address:"+address);
		for (int i=0;i<Accounts.size();i++){
			Account accountFromVector=(Account)Accounts.elementAt(i);
			accountFromVector.displayAccountDetails();
			}
	}
}

abstract class Transaction{
	private Account belongAccount;
	private Customer customerShow;
	private double money;
	private String type;
	
	public Transaction(Account k,double num,Customer j,String m){
		belongAccount=k;
		money=num;
		customerShow=j;
		type=m;
	}
	public void displayDetails(){
		System.out.println("The operation's imformation is... Type:"+type+" num:"+money+" belongs to:"+this.belongAccount.getAccountNum());
	}
}

class depositTransaction extends Transaction{
	public depositTransaction(Account k,double num,Customer j){
		super(k,num,j,"deposit");
		k.deposit(num);
	}
}

class withDrawalTransaction extends Transaction{
	public withDrawalTransaction(Account k,double num,Customer j){
		super(k,num,j,"withDrawal");
		k.withDrawal(num);
	}
}

public class BankUsst{
	
	public static void main(String args[]){
		Vector customers=new Vector();
		int accountTest=1;
		Customer cust1=null;
		Customer cust2=null;
		Customer cust3=null;
		Account ac1=null;
		Transaction ta1=null;
		Transaction ta2=null;
		cust1=new Customer("jocund","shanghai");
		cust2=new Customer("ray","beijing");
		cust3=new Customer("malloc","hubei");
		BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
		int choice=(int)(Math.random()*10000)%3+1;;
		
		switch (choice){
			case 1:for (int j=0;j<3;j++){
				   int secondChoice=(int)(Math.random()*10000)%2+1;
			       if (secondChoice==1){
			       ac1=new CurrentAccount("Current",0.0,accountTest,-100);accountTest++;}
			       else if(secondChoice==2){
			       ac1=new SavingAccount("Saving",0.0,accountTest,0.02);accountTest++;}
			       
			       cust1.addAccount(ac1);
			       ac1.displayAccountDetails();
			       for (int i=0;i<5;i++){
			       ta1=new depositTransaction(ac1,100,cust1);
			       ac1.addTransaction(ta1);
			       ac1.displayAccountDetails();}
			       for (int i=0;i<3;i++){
			       ta2=new withDrawalTransaction(ac1,50,cust1);
			       ac1.addTransaction(ta2);
			       ac1.displayAccountDetails();}
			       ac1.displayAllTransactions();
			       }//end for
			       cust1.displayAll();
			       break;
			case 2:for (int j=0;j<3;j++){
				   int secondChoice=(int)(Math.random()*10000)%2+1;
			       if (secondChoice==1){
			       ac1=new CurrentAccount("Current",0.0,accountTest,-100);accountTest++;}
			       else if(secondChoice==2){
			       ac1=new SavingAccount("Saving",0.0,accountTest,0.02);accountTest++;}
			       
			       cust2.addAccount(ac1);
			       ac1.displayAccountDetails();
			       for (int i=0;i<5;i++){
			       ta1=new depositTransaction(ac1,100,cust2);
			       ac1.addTransaction(ta1);
			       ac1.displayAccountDetails();}
			       for (int i=0;i<3;i++){
			       ta2=new withDrawalTransaction(ac1,50,cust2);
			       ac1.addTransaction(ta2);
			       ac1.displayAccountDetails();}
			       ac1.displayAllTransactions();
			       }//end for
			       cust2.displayAll();
			       break;
			case 3:for (int j=0;j<3;j++){
				   int secondChoice=(int)(Math.random()*10000)%2+1;
			       if (secondChoice==1){
			       ac1=new CurrentAccount("Current",0.0,accountTest,-100);accountTest++;}
			       else if(secondChoice==2){
			       ac1=new SavingAccount("Saving",0.0,accountTest,0.02);accountTest++;}
			       
			       cust3.addAccount(ac1);
			       ac1.displayAccountDetails();
			       for (int i=0;i<5;i++){
			       ta1=new depositTransaction(ac1,100,cust3);
			       ac1.addTransaction(ta1);
			       ac1.displayAccountDetails();}
			       for (int i=0;i<3;i++){
			       ta2=new withDrawalTransaction(ac1,50,cust3);
			       ac1.addTransaction(ta2);
			       ac1.displayAccountDetails();}
			       ac1.displayAllTransactions();
			       }//end for
			       cust3.displayAll();
			       break;
		}//end switch

	}
}