class Employee implements Serializable{
    private String name;
    private int age;
    private float salary;
    Employee(String name,int age){
        this.name=name;
        this.age=age;
    }
    public String toString(){
        return "name:"+name+"\n"
               +"age:"+age+"\n"
               +"salary:"+salary;
    }
    public void SetAge(int age){
        this.age=age;
    }
}

public class SerializableDemo {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        System.out.println("原来的对象：");
        Employee em=new Employee("Qing",19);
        System.out.println(em);
        ByteArrayOutputStream buff=new ByteArrayOutputStream();
        ObjectOutputStream out=new ObjectOutputStream(buff);
        out.writeObject(em);
        Employee.salary=20000.00;
        em.SetAge(24);
        ObjectInputStream in=new ObjectInputSream(new ByteArrayInputStream(buff.toByteArray()));
        Employee newEm=(Empolyee)in.readObject();
        System.out.println("序列化后取出的对象：");
        System.out.println(newEm);
    }
}