Java Java.io.FilterOutputStream.write() 方法

  • 描述

    java.io.FilterOutputStream.write(byte[] b)方法将b.length个字节写入此输出流。
  • 声明

    以下是java.io.FilterOutputStream.write(byte[] b)方法的声明-
     public void write(byte[] b)
  • 参数

    b要写入流的源缓冲区
  • 返回值

    此方法不返回任何值。
  • 异常

    IOException如果发生I / O错误。
  • 例子

    以下示例显示java.io.FilterOutputStream.write(byte [] b)方法的用法。
     
    package com.jc2182;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.FilterOutputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    
    public class FilterOutputStreamDemo {
       public static void main(String[] args) throws Exception {
          OutputStream os = null; 
          FilterOutputStream fos = null;
          FileInputStream fis = null;
          byte[] buffer = {65, 66, 67, 68, 69};
          int i = 0;
          char c;
          
          try {
             // create output streams
             os = new FileOutputStream("C://test.txt");
             fos = new FilterOutputStream(os);
    
             // writes buffer to the output stream
             fos.write(buffer);
                      
             // forces byte contents to written out to the stream
             fos.flush();
             
             // create input streams
             fis = new FileInputStream("C://test.txt");
             
             while((i = fis.read())!=-1) {
             
                // converts integer to the character
                c = (char)i;
                
                // prints
                System.out.println("Character read: "+c);
             }
             
          } catch(IOException e) {
             // if any I/O error occurs
             System.out.print("Close() is invoked prior to write()");
          } finally {
             // releases any system resources associated with the stream
             if(os!=null)
                os.close();
             if(fos!=null)
                fos.close();
          }
       }
    }
    
    让我们编译并运行以上程序,这将产生以下结果-
     
    Character read: A
    Character read: B
    Character read: C
    Character read: D
    Character read: E