pipedreader

PipedReader類(lèi)ready()方法 (PipedReader Class ready() method)

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

  ready()方法在java.io包中可用。

• ready() method is used to check whether this PipedReader stream is ready to be read or not.

  ready()方法用于檢查此PipedReader流是否已準(zhǔn)備好被讀取。

• ready() 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.

  ready()方法是一種非靜態(tài)方法，只能通過(guò)類(lèi)對(duì)象訪(fǎng)問(wèn)，如果嘗試使用類(lèi)名稱(chēng)訪(fǎng)問(wèn)該方法，則會(huì)收到錯(cuò)誤消息。

• ready() method may throw an exception at the time of checking the state of the stream.

  在檢查流的狀態(tài)時(shí)， ready()方法可能會(huì)引發(fā)異常。

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

  IOException ：遇到任何輸入/輸出錯(cuò)誤時(shí)，可能引發(fā)此異常。

Syntax:

句法：

public boolean ready();

Parameter(s):

參數(shù)：

• It does not accept any parameter.

  它不接受任何參數(shù)。

Return value:

返回值：

The return type of the method is boolean, it returns true when this stream is ready to read (i.e. when input is available for next read() without blocking) otherwise it returns false.

該方法的返回類(lèi)型為boolean ，當(dāng)此流準(zhǔn)備好讀取時(shí)(即，當(dāng)輸入可用于下一個(gè)read()而不阻塞時(shí))返回true，否則返回false。

Example:

例：

// Java program to demonstrate the example // of boolean ready() method of PipedReaderimport java.io.*;public class ReadyOfPR {public static void main(String[] args) throws Exception {try {// Instantiates PipedReader and PipedWriterPipedWriter pipe_w = new PipedWriter();PipedReader pipe_r = new PipedReader();pipe_r.connect(pipe_w);// By using ready() method is to check whether// this stream pipe_r is ready to be read or notboolean status = pipe_r.ready();System.out.println("pipe_r.ready(): " + status);// By using close() method is to close// the streampipe_w.close();pipe_w.close();} catch (Exception ex) {System.out.println(ex.toString());}} }

Output

輸出量

pipe_r.ready(): false

翻譯自: https://www.includehelp.com/java/pipedreader-ready-method-with-example.aspx

pipedreader

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