Java.io.BufferedWriter.flush()方法實例

java.io.BufferedWriter.flush() 方法自刷新寫緩衝區的字符的字符或字節流作爲預定的目的地。

聲明

以下是java.io.BufferedWriter.flush()方法的聲明

public Writer flush()

參數

• NA

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

下面的示例演示java.io.BufferedWriter.flush()方法的用法。

package com.yiibai; import java.io.BufferedWriter; import java.io.IOException; import java.io.StringWriter; public class BufferedWriterDemo { public static void main(String[] args) throws IOException { StringWriter sw = null; BufferedWriter bw = null; String letters = "ABCDEFGHIJK"; try{ // create string writer sw = new StringWriter(); //create buffered writer bw = new BufferedWriter(sw); // for each character in the string for (char c: letters.toCharArray()) { // append character to the writer bw.append(c); // flush the characters to the intended stream bw.flush(); // print string buffer from string writer System.out.println(sw.getBuffer()); } }catch(IOException e){ // if I/O error occurs e.printStackTrace(); }finally{ // releases any system resources associated with the stream if(sw!=null) sw.close(); if(bw!=null) bw.close(); } } }

讓我們來編譯和運行上面的程序，這將產生以下結果：

A
AB
ABC
ABCD
ABCDE
ABCDEF
ABCDEFG
ABCDEFGH
ABCDEFGHI
ABCDEFGHIJ
ABCDEFGHIJK