Java深拷贝代码示例

Java深拷贝可以使用序列化来实现，下面是示例代码：

import java.io.*;

public class DeepCopy implements Serializable {

    private int value;
    private DeepCopyObj obj;

    public DeepCopy(int value, DeepCopyObj obj) {
        this.value = value;
        this.obj = obj;
    }

    public DeepCopy deepCopy() throws IOException, ClassNotFoundException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bos);
        oos.writeObject(this);

        ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
        ObjectInputStream ois = new ObjectInputStream(bis);
        return (DeepCopy) ois.readObject();
    }

    public static void main(String[] args) throws IOException, ClassNotFoundException {
        DeepCopyObj obj = new DeepCopyObj(1, "obj");
        DeepCopy deepCopy = new DeepCopy(2, obj);
        DeepCopy deepCopy2 = deepCopy.deepCopy();
        System.out.println(deepCopy == deepCopy2); // false
        System.out.println(deepCopy.obj == deepCopy2.obj); // false
    }
}

class DeepCopyObj implements Serializable {
    private int value;
    private String name;

    public DeepCopyObj(int value, String name) {
        this.value = value;
        this.name = name;
    }
}

以上代码中，我们使用了Java的序列化机制实现了对象的深拷贝。实现方式是将对象序列化为一个字节数组，然后再将其反序列化为一个新的对象。需要注意的是，被拷贝对象及其属性都需要实现Serializable接口。