OutputStreamWriter類flush()方法 (OutputStreamWriter Class flush() method)

• flush() method is available in java.io package.

  flush()方法在java.io包中可用。

• flush() method is used to flush this stream.

  flush()方法用于刷新此流。

• flush() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  flush()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• flush() method may throw an exception at the time of flushing the stream.

  flush()方法在刷新流時可能會引發異常。

  IOException: This exception may throw when getting any input/output error while performing.

  IOException ：在執行過程中遇到任何輸入/輸出錯誤時，可能引發此異常。

Syntax:

句法：

public void flush();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of the method is void, it returns nothing.

該方法的返回類型為void ，不返回任何內容。

Example:

例：

// Java program to demonstrate the example // of void flush() method // of OutputStreamWriterimport java.io.*;public class FlushOfOSW {public static void main(String[] args) throws Exception {OutputStream os_stm = null;OutputStreamWriter osw_stm = null;InputStream is_stm = null;int val = 65;try {// Instantiates FileOutputStream and // FileInputStream and OutputStreamWriteros_stm = new FileOutputStream("D:\\includehelp.txt");osw_stm = new OutputStreamWriter(os_stm);// Loop to write byte to the streamfor (int i = 0; i < 3; ++i) {osw_stm.write(val);val++;}// By using flush() method is to// flush the streamosw_stm.flush();System.out.println("Stream Flushed...");is_stm = new FileInputStream("D:\\includehelp.txt");// Loop to read byte from the streamfor (int i = 0; i < 3; ++i) {char ch = (char) is_stm.read();System.out.println("ch: " + ch);}osw_stm.close();System.out.println("Stream Closed Successfully....");} catch (Exception ex) {System.out.println(ex.toString());} finally {// with the help of this block is to// free all necessary resources linked// with the streamif (is_stm != null) {is_stm.close();if (os_stm != null) {os_stm.close();}}}} }

Output

輸出量

Stream Flushed... ch: A ch: B ch: C Stream Closed Successfully....

翻譯自: https://www.includehelp.com/java/outputstreamwriter-flush-method-with-example.aspx

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