PushbackInputStream類skip()方法 (PushbackInputStream Class skip() method)

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

  skip()方法在java.io包中可用。

• skip() method is used to skip the given number of bytes of content from this PushbackInputStream. When the given parameter is less than 0 then no bytes are skipped.

  skip()方法用于從此PushbackInputStream跳過給定數(shù)量的內(nèi)容字節(jié)。 當給定參數(shù)小于0時，則不跳過任何字節(jié)。

• skip() 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.

  skip()方法是一種非靜態(tài)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。

• skip() method may throw an exception at the time of skipping bytes of data.

  skip()方法在跳過數(shù)據(jù)字節(jié)時可能會引發(fā)異常。

  IOException: This exception may throw when getting any input/output error while performing or stream close by its close() method or stream unsupport seek() method.

  IOException ：在執(zhí)行過程中或通過其close()方法關(guān)閉流或不支持流的seek()方法時，如果遇到任何輸入/輸出錯誤，則可能引發(fā)此異常。

Syntax:

句法：

public long skip(long number);

Parameter(s):

參數(shù)：

• long number represents the number of bytes to be skipped.

  long number表示要跳過的字節(jié)數(shù)。

Return value:

返回值：

The return type of the method is long, it returns the exact number of bytes skipped.

該方法的返回類型為long ，它返回跳過的確切字節(jié)數(shù)。

Example:

例：

// Java program to demonstrate the example // of long skip(long number) method of // PushbackInputStreamimport java.io.*;public class SkipOfPBIS {public static void main(String[] args) throws Exception {byte[] b_arr = {97,98,99,100,101,102,103,104,105};InputStream is_stm = null;PushbackInputStream pb_stm = null;try {// Instantiates ByteArrayOutputStream and PushbackInputStreamis_stm = new ByteArrayInputStream(b_arr);pb_stm = new PushbackInputStream(is_stm);// Loop to read till reach its endfor (int i = 0; i < 4; ++i) {// By using read() method is to // convert byte into charchar ch = (char) pb_stm.read();System.out.println("ch: " + ch);// By using skip() method is to// skip the given byte of data // from the streamlong skip = pb_stm.skip(1);System.out.println("pb_stm.skip(1): " + skip);}} catch (Exception ex) {System.out.println(ex.toString());} finally {if (is_stm != null)is_stm.close();if (pb_stm != null)pb_stm.close();}} }

Output

輸出量

ch: a pb_stm.skip(1): 1 ch: c pb_stm.skip(1): 1 ch: e pb_stm.skip(1): 1 ch: g pb_stm.skip(1): 1

翻譯自: https://www.includehelp.com/java/pushbackinputstream-skip-method-with-example.aspx

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