Java ObjectOutputStream writeBoolean()用法及代碼示例

ObjectOutputStream類writeBoolean()方法

• writeBoolean() 方法可在java.io包。
• writeBoolean() 方法用於寫入給定的布爾值。
• writeBoolean() 方法是一個非靜態方法，它隻能通過類對象訪問，如果我們嘗試使用類名訪問方法，那麽我們將得到一個錯誤。
• writeBoolean() 方法可能在寫入布爾值時拋出異常。
  IOException:在寫入輸出流時出現任何輸入/輸出錯誤時，可能會拋出此異常。

用法:

    public void writeBoolean(boolean value);

參數：

• boolean value– 表示要寫入的布爾值。

返回值：

該方法的返回類型是void，它什麽都不返回。

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();
 }
}

輸出

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