RandomAccessFile類writeBytes()方法 (RandomAccessFile Class writeBytes() method)

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

  writeBytes()方法在java.io包中可用。

• writeBytes() method is used to write the sequence of bytes (i.e. string) to the file. Every character exists in the string is written out in a sequence by skipping its higher 8 bits

  writeBytes()方法用于將字節(jié)序列(即字符串)寫入文件。 字符串中存在的每個(gè)字符通過跳過其高8位而按順序?qū)懗?

• writeBytes() 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.

  writeBytes()方法是一個(gè)非靜態(tài)方法，只能通過類對(duì)象訪問，如果嘗試使用類名稱訪問該方法，則會(huì)收到錯(cuò)誤消息。

• writeBytes() method may throw an exception at the time of writing bytes.

  writeBytes()方法在寫入字節(jié)時(shí)可能會(huì)引發(fā)異常。

  IOException: This exception may throw an exception while performing input/output operation.

  IOException ：在執(zhí)行輸入/輸出操作時(shí)，此異常可能會(huì)引發(fā)異常。

Syntax:

句法：

public final void writeBytes(String str);

Parameter(s):

參數(shù)：

• String str – represents the string to write.

  字符串str –表示要寫入的字符串。

Return value:

返回值：

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

此方法的返回類型為void ，不返回任何內(nèi)容。

Example:

例：

// Java program to demonstrate the example // of void writeBytes(String str) method of // RandomAccessFileimport java.io.*; class RAFWriteBytes {public static void main(String[] args) throws Exception {// Instantiate a random access file// object with file name and permissionsRandomAccessFile ra_f = new RandomAccessFile("e:/includehelp.txt", "rw");// By using writeBytes() method is to // write sequence of bytes i.e. string// at a time to the filera_f.writeBytes("Welcome, in Java World!!!");// by using seek() method is to // set the current file indicator// from where read/write could // start i.e. we set here 0 so reading// will be done from 0 till EOFra_f.seek(0);// By using readLine() method is to // read string from this fileSystem.out.println("ra_f.readLine(): " + ra_f.readLine());// By using close() method isto// close this stream ran_fra_f.close();} }

Output

輸出量

ra_f.readLine(): Welcome, in Java World!!!!!

翻譯自: https://www.includehelp.com/java/randomaccessfile-writebytes-method-with-example.aspx

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