java.io.ObjectOutputStream.defaultWriteObject() 方法寫入當前類的非靜態和非瞬態字段寫入此流。這也許隻能稱為從類被序列化的writeObject方法。它會拋出NotActiveException如果它被調用。

聲明

以下是java.io.ObjectOutputStream.defaultWriteObject()方法的聲明

public void defaultWriteObject()

參數

• NA

返回值

這個方法冇有返回值

異常

• IOException -- 如果在寫入到底層OutputStream發生I / O錯誤

例子

下麵的示例演示java.io.ObjectOutputStream.defaultWriteObject()方法的用法。

package com.yiibai;

import java.io.*;

public class ObjectOutputStreamDemo {

   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();

      }
   }
}

讓我們編譯和運行上麵的程序，這將產生以下結果：

319874
1653984