java.io.BufferedWriter.flush() 方法自重新整理寫緩衝區的字元的字元或位元組流作為預定的目的地。
以下是java.io.BufferedWriter.flush()方法的宣告
public Writer 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.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(); } } }
讓我們來編譯和執行上面的程式,這將產生以下結果:
A
AB
ABC
ABCD
ABCDE
ABCDEF
ABCDEFG
ABCDEFGH
ABCDEFGHI
ABCDEFGHIJ
ABCDEFGHIJK