Serializable，具体代码例子

Serializable 是 Java 中的一个接口，用于实现对象的序列化和反序列化。下面是一个简单的代码例子：

import java.io.*;

public class Person implements Serializable {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public void printInfo() {
        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
    }

    public static void main(String[] args) {
        Person person = new Person("Tom", 20);

        try {
            FileOutputStream fileOut = new FileOutputStream("person.ser");
            ObjectOutputStream out = new ObjectOutputStream(fileOut);
            out.writeObject(person);
            out.close();
            fileOut.close();
            System.out.println("Serialized data is saved in person.ser");
        } catch (IOException i) {
            i.printStackTrace();
        }

        try {
            FileInputStream fileIn = new FileInputStream("person.ser");
            ObjectInputStream in = new ObjectInputStream(fileIn);
            Person newPerson = (Person) in.readObject();
            in.close();
            fileIn.close();
            System.out.println("Deserialized data:");
            newPerson.printInfo();
        } catch (IOException i) {
            i.printStackTrace();
            return;
        } catch (ClassNotFoundException c) {
            System.out.println("Person class not found");
            c.printStackTrace();
            return;
        }
    }
}

在这个例子中，我们定义了一个 Person 类，实现了 Serializable 接口。我们将一个 Person 对象序列化到文件中，然后再从文件中反序列化出来，并打印出对象的信息。