Java ObjectOutputStream reset()用法及代码示例

ObjectOutputStream类reset()方法

• reset() 方法可在java.io包。
• reset() 方法用于重置此流。它将流重置到最近标记的位置。
• reset() 方法是一个非静态方法，它只能通过类对象访问，如果我们尝试使用类名访问方法，那么我们将得到一个错误。
• reset() 方法可能会在重置流时抛出异常。
  IOException:在写入输出流时出现任何输入/输出错误时，可能会抛出此异常。

用法:

    public void reset();

参数：

• 它不接受任何参数。

返回值：

这个方法的返回类型是void，它什么都不返回。

例：

// Java program to demonstrate the example 
// of void reset() method of ObjectOutputStream

import java.io.*;

public class ResetOfOOS {
 public static void main(String[] args) throws Exception {
  // Instantiates ObjectOutputStream , ObjectInputStream 
  // FileInputStream and FileOutputStream
  FileOutputStream file_out_stm = new FileOutputStream("D:\\includehelp.txt");
  ObjectOutputStream obj_out_stm = new ObjectOutputStream(file_out_stm);
  FileInputStream file_in_stm = new FileInputStream("D:\\includehelp.txt");
  ObjectInputStream obj_in_stm = new ObjectInputStream(file_in_stm);

  // By using writeByte() method is to
  // write byte to the stream		
  obj_out_stm.writeByte(65);

  // By using reset() method is to
  // reset the stream 
  obj_out_stm.reset();

  // Write another bytes to the
  // stream
  obj_out_stm.writeByte(66);
  obj_out_stm.writeByte(67);

  // By using flush() method is to
  // flush the stream immediately
  System.out.println("Stream Flushed...");
  obj_out_stm.flush();

  // By using readByte() method is to 
  // read the byte and convert it into
  // char
  for (int i = 0; i < 3; ++i) {
   char ch = (char) obj_in_stm.readByte();
   System.out.println("ch:" + ch + " ");
  }

  // By using close() method is to 
  // close all the streams 
  System.out.println("Stream Shutdown... ");

  file_in_stm.close();
  file_out_stm.close();
  obj_in_stm.close();
  obj_out_stm.close();
 }
}

输出

Stream Flushed...
ch:A 
ch:B 
ch:C 
Stream Shutdown...