Untitled

Bill.java:


public class Bill extends Money{
private int dollars;

public Bill (int d) {
dollars = d;
}
public int getValue () {
return dollars;
}
public String toString(){
return ("$ "+dollars+".00");
}
}

Coin.java:

public abstract class Coin extends Money {
private int value;

public Coin(int v) {
value = v;
}
public int getValue () {
return value;
}
public String toString() {
String a="";
if(value<10) a="0";
return ("$ 0."+a+getValue());
}
}

Dime.java:

public class Dime extends Coin{
public Dime () {
super (10);
}
}

Money.java:

import java.io.*;
public class Money implements Serializable {

}

Nikels.java:

public class Nikels extends Coin{
public Nikels () {
super (5);
}
}

Penny.java:

public class Penny extends Coin{
public Penny(){
super(1);
}
}

Quarter.java:


public class Quarter extends Coin {

public Quarter () {
super (25);
}
}

ReadDate.java:


import java.io.*;
import java.util.Date;

public class ReadDate {

public static void main(String argv[]) throws Exception {
FileInputStream fis = new FileInputStream("date.out");
ObjectInputStream ois = new ObjectInputStream(fis);
Date date = (Date) ois.readObject();
System.out.println("The date is: "+date);
ois.close();
fis.close();
}
}

ReadMoney.java:


import java.io.*;
import java.util.Date;

public class ReadMoney {

public static void main(String argv[]) throws Exception {
FileInputStream fis = new FileInputStream("date.out");
ObjectInputStream ois = new ObjectInputStream(fis);
while(fis.available()!=0){
Object a=ois.readObject();
if(a instanceof Quarter)System.out.println((Quarter)a);
else if(a instanceof Nikels)System.out.println((Nikels)a);
else if(a instanceof Dime)System.out.println((Dime)a);
else if(a instanceof Penny)System.out.println((Penny)a);
}

ois.close();
fis.close();
}
}

SaveDate.java:


import java.io.*;
import java.util.Date;

public class SaveDate {

public static void main(String argv[]) throws Exception {
FileOutputStream fos = new FileOutputStream("date.out");
ObjectOutputStream oos = new ObjectOutputStream(fos);
Date date = new Date();
oos.writeObject(date);
oos.flush();
oos.close();
fos.close();
}
}

SaveMoney.java:


import java.io.*;
import java.util.Date;

public class SaveMoney {

public static void main(String argv[]) throws Exception {
FileOutputStream fos = new FileOutputStream("date.out");
ObjectOutputStream oos = new ObjectOutputStream(fos);
for(int i=0;i<2;i++){
Quarter q = new Quarter();
oos.writeObject(q);
Nikels n = new Nikels();
oos.writeObject(n);
Dime d = new Dime();
oos.writeObject(d);
Penny p = new Penny();
oos.writeObject(p);
}
oos.flush();
oos.close();
fos.close();
}
}