java.io.BufferedInputStream.flush() 方法重新整理緩衝的輸出位元組寫入到基礎輸出流。
以下是java.io.BufferedOutputStream.flush()方法的宣告
public void flush()
NA
此方法不返回任何值。
IOException -- --如果發生I/ O錯誤。
下面的範例演示java.io.BufferedOutputStream.flush()方法的用法。
package com.yiibai; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; import java.io.IOException; public class BufferedOutputStreamDemo { public static void main(String[] args) throws Exception { FileInputStream is = null; BufferedInputStream bis = null; ByteArrayOutputStream baos = null; BufferedOutputStream bos = null; try{ // open input stream test.txt for reading purpose. is = new FileInputStream("c:/test.txt"); // input stream is converted to buffered input stream bis = new BufferedInputStream(is); // creates a new byte array output stream baos = new ByteArrayOutputStream(); // creates a new buffered output stream to write 'baos' bos = new BufferedOutputStream(baos); int value; // the file is read to the end while ((value = bis.read()) != -1) { bos.write(value); } // invokes flush to force bytes to be written out to baos bos.flush(); // every byte read from baos for (byte b: baos.toByteArray()) { // converts byte to character char c = (char)b; System.out.print(c); } }catch(IOException e){ // if any IOException occurs e.printStackTrace(); }finally{ // releases any system resources associated with the stream if(is!=null) is.close(); if(bis!=null) bis.close(); if(baos!=null) baos.close(); if(bos!=null) bos.close(); } } }
假設我們有一個文字檔案c:/ test.txt,它具有以下內容。該檔案將被用作輸入在我們的範例程式:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
讓我們來編譯和執行上面的程式,這將產生以下結果:
ABCDEFGHIJKLMNOPQRSTUVWXYZ