java.io.FilterOutputStream.write(byte[] b, int off, int len)方法實例

java.io.FilterOutputStream.write(byte[] b, int off, int len) 方法從指定的字節數組開始到當前輸出流關閉寫入len字節。

聲明

以下是java.io.FilterOutputStream.write(byte[] b, int off, int len)方法的聲明：

public void write(byte[] b, int off, int len)

參數

• b -- 源緩衝區被寫入到流

• off -- 開始在數據偏移

• len -- 字節寫數

返回值

此方法不返回任何值。

異常

• IOException -- 如果發生I/ O錯誤。

例子

下面的例子顯示java.io.FilterOutputStream.write(byte[] b, int off, int len) 方法用法。

package com.yiibai; 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, 2, 3); // 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(); } } }

讓我們編譯和運行上面的程序，這將產生以下結果：

Character read: C Character read: D Character read: E