ObjectOutputStream defaultWriteObject()方法

java.io.ObjectOutputStream.defaultWriteObject() 此方法将当前类的非静态和非瞬态字段写入此流。只能从要序列化的类的writeObject方法中调用此方法。如果否则调用它将抛出NotActiveException。

1 语法

public void defaultWriteObject()

2 参数

无

3 返回值

无

4 示例 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.io.ObjectOutputStream.defaultWriteObject()方法的例子
 */
import java.io.*;

public class Demo {
    public static void main(String[] args) {
        int i = 319874;

        try {
            // create a new file with an ObjectOutputStream
            FileOutputStream out = new FileOutputStream("test.txt");
            ObjectOutputStream oout = new ObjectOutputStream(out);

            // write something in the file
            oout.writeInt(i);
            oout.writeInt(1653984);
            oout.flush();

            // close the stream
            oout.close();

            // create an ObjectInputStream for the file we created before
            ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

            // read and print an int
            System.out.println("" + ois.readInt());

            // read and print an int
            System.out.println("" + ois.readInt());

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    static class Example implements Serializable {
        String s = "Hello World!";

        private void writeObject(ObjectOutputStream out)
                throws IOException, ClassNotFoundException {
            out.defaultWriteObject();
        }
    }
}

输出结果为：

319874
1653984