Java.io.BufferedWriter.close()方法實例

java.io.BufferedWriter.close() 刷新方法從流中的字符，然後將其關閉。關閉後，再write(), append() or flush() 調用將拋出IOException。

聲明

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

public Writer close()

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.close()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; try{ // create string writer sw = new StringWriter(); //create buffered writer bw = new BufferedWriter(sw); // append character. bw.append("1"); // close the writer bw.close(); // print before appending one more character System.out.println(sw.getBuffer()); // appending after closing will throw error bw.append("2"); // print after appending one more character System.out.println(sw.getBuffer()); }catch(IOException e){ // if I/O error occurs System.out.print("Cannot append, buffered writer is closed"); }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：

1 Cannot append, buffered writer is closed