text.java

项目实战

abstract class Account{/*定义类*/
	double balance;
	String name;
	Account(){
				
	}
	Account(double no,String no1){
		balance=no;
		name=no1;		
	}
	String getName(){
		return name;
	}
	double getBalance(){
		return balance;
	}
	void deposit(double amt){
		balance+=amt;
		System.out.println("存款"+amt);		
	}
	void withdraw(double amt){
		balance-=amt;
		System.out.println("取款"+amt);		
	}
}
class SavingsAccount extends Account{
	double interestRate;
	SavingsAccount(double no,String no1,double i){
		super(no,no1);
		interestRate=i;
		System.out.println("储蓄帐户详细信息");
		System.out.println("------------------");
		System.out.println(name+"初始余额为："+balance);
	}
	void add(){	
	System.out.println(name+"交易后余额为："+balance);
	}
	
}
class CheckingsAccount extends Account{
	double overDraft;
	CheckingsAccount(double no,String no1,double i){
		super(no,no1);
		overDraft=i;
		System.out.println("支票帐户详细信息");
		System.out.println("------------------");
		System.out.println(name+"初始余额为："+balance);
	}
  void withdraw1(double amt){
	System.out.println("透支金额："+overDraft);
	if(amt<=balance){
		balance-=amt;		
		System.out.println("取款"+amt);	
	}else if((amt>balance)&&(amt>(balance+overDraft))){
		System.out.println("对不起！你不能取款！");	
	}else{
		double result=amt-balance;
		balance=0;
		System.out.println("取款"+amt);	
		System.out.println("当前透支金额："+result);	
	}			
	}
	void add1(){	
	System.out.println(name+"交易后余额为："+balance);	
	}
	
}
class testAddition{
	testAddition(){
	}
	public static void main(String []args){
	SavingsAccount numobj=new SavingsAccount(500,"John",0.04);
	numobj.deposit(200);
	numobj.withdraw(100);
    numobj.add();
    
    CheckingsAccount bumobj=new CheckingsAccount(200,"Johnrett",200);
	bumobj.deposit(200);
	bumobj.withdraw1(500);
    bumobj.add1();
	}
}