1. WIKI教程
2. Java.io包
3. abstract void put(String name, short val)

abstract void put(String name, short val)

描述 (Description)

java.io.ObjectOutputStream.PutField.put(String name, short val)方法将指定的短字段的值放入持久字段中。

声明 (Declaration)

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

public abstract void put(String name, short val)

参数 (Parameters)

• name - 可序列化字段的名称。

• val - 要分配给字段的值。

返回值 (Return Value)

此方法不返回值。

异常 (Exception)

IllegalArgumentException - 如果name与正在写入其字段的类的可序列化字段的名称不匹配，或者命名字段的类型short 。

例子 (Example)

以下示例显示了java.io.ObjectOutputStream.PutField.put()方法的用法。

package com.iowiki;
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();
      }
   }
}

让我们编译并运行上面的程序，这将产生以下结果 -

5