Java.io.ObjectOutputStream.putFields()方法實例

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方法被稱爲流。

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

下面的示例演示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面的程序，這將產生以下結果：

319874 1653984