Java ObjectOutputStream writeBoolean()用法及代码示例

ObjectOutputStream类writeBoolean()方法

• writeBoolean() 方法可在java.io包。
• writeBoolean() 方法用于写入给定的布尔值。
• writeBoolean() 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。
• writeBoolean() 方法可能在写入布尔值时抛出异常。
  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 writeBoolean(boolean value);

参数：

• boolean value– 表示要写入的布尔值。

返回值：

该方法的返回类型是void，它什么都不返回。

例：

// Java program to demonstrate the example 
// of void writeBoolean(boolean value) method of //ObjectOutputStream

import java.io.*;

public class WriteBooleanOfOOS {
 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 writeBoolean() method is to
  // write the boolean to the stream		
  obj_out_stm.writeBoolean(true);
  obj_out_stm.writeBoolean(false);

  obj_out_stm.flush();


  // By using readBoolean() method is to 
  // read the boolean
  boolean b1 = (boolean) obj_in_stm.readBoolean();
  boolean b2 = (boolean) obj_in_stm.readBoolean();

  System.out.println("obj_in_stm.readBoolean():" + b1);
  System.out.println("obj_in_stm.readBoolean():" + b2);


  // 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

obj_in_stm.readBoolean():true
obj_in_stm.readBoolean():false
Stream Shutdown...