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class InsufficientFundsException extends Exception { public InsufficientFundsException(double balance, double withdrawalAmount) { super("Insufficient funds. Current balance: $" + balance + ", tried to withdraw: $" + withdrawalAmount); } } class BankAccount { private int accountNumber; private double balance; private String accountHolder; public BankAccount(double initialBalance) { balance = initialBalance; } public void withdraw(double amount) throws InsufficientFundsException { if (amount > balance) { throw new InsufficientFundsException(balance, amount); } balance -= amount; } } public class BankAccountExample { public static void main(String[] args) { BankAccount account = new BankAccount(1000.0); try { account.withdraw(1500.0); } catch (InsufficientFundsException e) { System.err.println("Error: " + e.getMessage()); } } } import java.io.*; import java.io.Serializable; class Person implements Serializable { private String name; private int age; public Person(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public int getAge() { return age; } } public class SerializationDeserializationExample { public static void main(String[] args) { // Create a Person object Person person = new Person("Alice", 30); // Serialize the Person object to a file serializePerson(person); // Deserialize the Person object from the file and print its information Person deserializedPerson = deserializePerson(); if (deserializedPerson != null) { System.out.println("Deserialized Person: Name: " + deserializedPerson.getName() + ", Age: " + deserializedPerson.getAge()); } } public static void serializePerson(Person person) { try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("person.ser"))) { oos.writeObject(person); System.out.println("Person object has been serialized."); } catch (IOException e) { e.printStackTrace(); } } public static Person deserializePerson() { try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("person.ser"))) { return (Person) ois.readObject(); } catch (IOException | ClassNotFoundException e) { e.printStackTrace(); return null; } } }
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