java.io.ObjectOutputStream.putFields() 方法檢索用於緩衝持久性字段被寫入流的對象。該字段將被寫入時writeFields方法被稱為流。

聲明

以下是java.io.ObjectOutputStream.putFields()方法聲明

public ObjectOutputStream.PutField putFields()

參數

• NA

返回值

此方法返回Putfield類的保存的序列化字段的實例

異常

• IOException -- 如果發生I/ O錯誤。

例子

下麵的示例演示java.io.ObjectOutputStream.putFields()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);

         // flush the stream
         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 public class Example implements Serializable {

      private void writeObject(ObjectOutputStream out)
              throws IOException {

         // write into the ObjectStreamField array the variable string
         ObjectOutputStream.PutField fields = out.putFields();


      }
   }
}

讓我們編譯和運行上麵的程序，這將產生以下結果：

319874
1653984