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()方法用于將字節序列(即字符串)寫入文件。 字符串中存在的每個字符通過跳過其高8位而按順序寫出

• 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。

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

  writeBytes()方法在寫入字節時可能會引發異常。

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

  IOException ：在執行輸入/輸出操作時，此異常可能會引發異常。

Syntax:

句法：

    public final void writeBytes(String str);

Parameter(s):

參數：

• 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 ，不返回任何內容。

Example:

例：

// Java program to demonstrate the example 
// of void writeBytes(String str) method of
// RandomAccessFile
import java.io.*;
class RAFWriteBytes {
public static void main(String[] args) throws Exception {
// Instantiate a random access file
// object with file name and permissions
RandomAccessFile 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 file
ra_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 EOF
ra_f.seek(0);
// By using readLine() method is to 
// read string from this file
System.out.println("ra_f.readLine(): " + ra_f.readLine());
// By using close() method isto
// close this stream ran_f
ra_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