java.io.ObjectOutputStream.drain() 方法可以释放ObjectOutputStream的任何缓冲的数据。类似冲洗,但不会传播刷新到基础流。
声明
以下是java.io.ObjectOutputStream.drain()方法的声明
protected void drain()
参数
-
NA
返回值
这个方法没有返回值
异常
-
IOException -- 如果在写入底层流发生I / O错误
例子
下面的示例演示java.io.ObjectOutputStream.drain()方法的用法。
package com.yiibai; import java.io.*; public class ObjectOutputStreamDemo extends ObjectOutputStream{ public ObjectOutputStreamDemo(OutputStream out) throws IOException { super(out); } public static void main(String[] args) { int i = 319874; try { // create a new file with an ObjectOutputStream FileOutputStream out = new FileOutputStream("test.txt"); ObjectOutputStreamDemo oout = new ObjectOutputStreamDemo(out); // write something in the file oout.writeInt(i); oout.writeInt(1653984); // drain the stream oout.drain(); // close the stream oout.close(); // create an ObjectInputStream for the file we created before ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt")); // read and print an int System.out.println("" + ois.readInt()); // read and print an int System.out.println("" + ois.readInt()); } catch (Exception ex) { ex.printStackTrace(); } } }
让我们编译和运行上面的程序,这将产生以下结果:
319874 1653984