java.io.ObjectOutputStream.PutField.put(String name, short val)方法实例

java.io.ObjectOutputStream.PutField.put(String name, short val) 方法把指定的短字段的值放到持久性字段。

声明

以下是java.io.ObjectOutputStream.PutField.put()方法的声明

public abstract void put(String name, short val)

参数

  • name -- 可序列化字段的名称

  • val --分配给字段的值

返回值

此方法无返回值。

异常

  • IllegalArgumentException -- 如果name不匹配一个序列化的字段,其字段正被写入,或者指定字段的类型不是short。

例子

下面的示例演示java.io.ObjectOutputStream.PutField.put()方法的用法。

package com.yiibai;import java.io.*;public class ObjectOutputStreamDemo implements Serializable { public static void main(String[] args) { 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.writeObject(new Example()); oout.flush(); oout.close(); // create an ObjectInputStream for the file we created before ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt")); // read an object from the stream and cast it to Example Example a = (Example) ois.readObject(); // print var of a System.out.println("" + a.var); } catch (Exception ex) { ex.printStackTrace(); } } static public class Example implements Serializable { static short var = 5; // assign a new serialPersistentFields  private static final ObjectStreamField[] serialPersistentFields = { new ObjectStreamField("var", Short.TYPE) }; private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException { // get the field and assign it at var ObjectInputStream.GetField fields = in.readFields(); // get var short d = 87; var = fields.get("var", d); } private void writeObject(ObjectOutputStream out) throws IOException { // write into the ObjectStreamField array the variable var ObjectOutputStream.PutField fields = out.putFields(); fields.put("var", var); out.writeFields(); } }}

让我们编译和运行上面的程序,这将产生以下结果:

Hello World