如何使用文本文件[Java]写入/读取多个对象数组

Question

我想将3个对象数组写入同一文本文件，并将数据加载回数组。然而，我似乎只能通过下面的代码将其用于arr1。如何更改此代码以将所有3个数组的数据写入同一文件并将数据加载回各自的数组？

import java.io.*;
public class CarCenter implements Serializable {
static CarCenter[] arr1 = new CarCenter[6];
static CarCenter[] arr2 = new CarCenter[6];
static CarCenter[] arr3 = new CarCenter[6];
public static void write() {
try {
FileOutputStream fos = new FileOutputStream("Data.txt");
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(arr1);
oos.writeObject(arr2);
oos.writeObject(arr3);
oos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void load() {
try {
FileInputStream fis = new FileInputStream("Data.txt");
ObjectInputStream ois = new ObjectInputStream(fis);
CarCenter[] saved = (CarCenter[]) ois.readObject();
arr1 = saved;
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
}
}

Answer 1

在您的代码中，您只加载arr1:的值

public static void load() {
try {
FileInputStream fis = new FileInputStream("Data.txt");
ObjectInputStream ois = new ObjectInputStream(fis);
CarCenter[] saved = (CarCenter[]) ois.readObject();
arr1 = saved;
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
}

你所要做的就是像这样读取其他对象：

public static void load() {
try {
FileInputStream fis = new FileInputStream("Data.txt");
ObjectInputStream ois = new ObjectInputStream(fis);
CarCenter[] saved = (CarCenter[]) ois.readObject();
arr1 = saved;
CarCenter[] saved2 = (CarCenter[]) ois.readObject();
arr2 = saved2;
CarCenter[] saved3 = (CarCenter[]) ois.readObject();
arr3 = saved3;
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
}

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想了解更多信息吗？

我建议阅读文档本身。