Java.io.BufferedWriter.flush() 方法
描述
java.io.BufferedWriter.flush() 方法将字符从写入缓冲区刷新到作为预期目标的字符或字节流。
声明
以下是 java.io.BufferedWriter.flush() 方法的声明。
public Writer flush()
参数
NA
返回值
此方法不返回任何值。
异常
IOException − 如果发生 I/O 错误。
示例
下面的例子展示了 java.io.BufferedWriter.flush() 方法的使用。
package com.tutorialspoint; 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(); } } }
让我们编译并运行上面的程序,这将产生下面的结果 −
A AB ABC ABCD ABCDE ABCDEF ABCDEFG ABCDEFGH ABCDEFGHI ABCDEFGHIJ ABCDEFGHIJK