Java.io.FilterOutputStream.flush() 方法
描述
java.io.FilterOutputStream.flush() 方法刷新此输出流并强制将任何缓冲的内容写出到流中。
声明
以下是 java.io.FilterOutputStream.flush() 方法的声明 −
public void 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.FilterOutputStream.flush() 方法的使用。
package com.tutorialspoint; 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; int i = 0; char c; try { // create output streams os = new FileOutputStream("C://test.txt"); fos = new FilterOutputStream(os); // writes byte to the output stream fos.write(65); // forces byte contents to written out to the stream fos.flush(); // create output streams fis = new FileInputStream("C://test.txt"); // read byte i=fis.read(); // convert integer to characters c = (char)i; // prints System.out.print("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(); } } }
让我们编译并运行上面的程序,这将产生下面的结果 −
Close() is invoked prior to write()