LineNumberInputStream類的available()方法 (LineNumberInputStream Class available() method)

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

  available()方法在java.io包中可用。

• available() method is used to return the number of available bytes that can be read from this LineNumberInputStream.

  available()方法用于返回可從此LineNumberInputStream讀取的可用字節數。

• available() 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.

  available()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。

• available() method may throw an exception at the time of returning available bytes.

  available()方法在返回可用字節時可能會引發異常。

  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 int available();

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 int, it returns the number of bytes left that can be read from this LineNumberInputStream without blocking.

方法的返回類型為int ，它返回可以從此LineNumberInputStream讀取而不會阻塞的剩余字節數。

Example:

例：

// Java program to demonstrate the example // of int available() method of // LineNumberInputStreamimport java.io.*;public class AvailableOfLNIS {public static void main(String[] args) throws Exception {FileInputStream fis_stm = null;LineNumberInputStream line_stm = null;int val = 0;try {// Instantiates FileInputStreamfis_stm = new FileInputStream("D:\\includehelp.txt");line_stm = new LineNumberInputStream(fis_stm);// Loop to read until available// bytes leftwhile ((val = fis_stm.read()) != -1) {// By using available() method is to// return the available bytes to be readint avail_bytes = line_stm.available();// Display corresponding byte valuebyte b = (byte) val;// Display value of avail_bytes and bSystem.out.print("line_stm.available(): " + avail_bytes);System.out.println(" : " + "byte: " + b);}} 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 (fis_stm != null) {fis_stm.close();if (line_stm != null) {line_stm.close();}}}} }

Output

輸出量

line_stm.available(): 1 : byte: 74 line_stm.available(): 1 : byte: 65 line_stm.available(): 0 : byte: 86 line_stm.available(): 0 : byte: 65

翻譯自: https://www.includehelp.com/java/linenumberinputstream-available-method-with-example.aspx

總結

以上是生活随笔為你收集整理的Java LineNumberInputStream available（）方法与示例的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。