ObjectInputStream類readByte()方法 (ObjectInputStream Class readByte() method)

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

  readByte()方法在java.io包中可用。

• readByte() method is used to read a byte (i.e. 8 bit) of data from this ObjectInputStream.

  readByte()方法用于從此ObjectInputStream讀取一個字節(即8位)的數據。

• readByte() 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.

  readByte()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。

• readByte() method may throw an exception at the time of reading byte.

  readByte()方法在讀取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。
  • EOFException: This exception may throw when the end of the file is reached.EOFException ：到達文件末尾時，可能會引發此異常。

Syntax:

句法：

    public byte readByte();

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 byte, it returns the byte value read.

該方法的返回類型為byte ，它返回讀取的字節值。

Example:

例：

// Java program to demonstrate the example 
// of byte readByte() method of 
// ObjectInputStream
import java.io.*;
public class ReadByteOfOIS {
public static void main(String[] args) throws Exception {
// Instantiates ObjectOutputStream , ObjectInputStream 
// FileInputStream and FileOutputStream
FileOutputStream file_out_stm = new FileOutputStream("D:\\includehelp.txt");
ObjectOutputStream obj_out_stm = new ObjectOutputStream(file_out_stm);
FileInputStream file_in_stm = new FileInputStream("D:\\includehelp.txt");
ObjectInputStream obj_in_stm = new ObjectInputStream(file_in_stm);
// By using writeUTF() method is to write
// string to the obj_out_stm stream
obj_out_stm.writeUTF("Java World!!!");
obj_out_stm.flush();
while (obj_in_stm.available() > 0) {
// By using readByte() method is to read
// string characters as a byte
byte val = (byte) obj_in_stm.readByte();
System.out.println("obj_in_stm.readByte(): " + val);
}
// By using close() method is to 
// close all the streams 
file_in_stm.close();
file_out_stm.close();
obj_in_stm.close();
obj_out_stm.close();
}
}

Output

輸出量

obj_in_stm.readByte(): 0
obj_in_stm.readByte(): 13
obj_in_stm.readByte(): 74
obj_in_stm.readByte(): 97
obj_in_stm.readByte(): 118
obj_in_stm.readByte(): 97
obj_in_stm.readByte(): 32
obj_in_stm.readByte(): 87
obj_in_stm.readByte(): 111
obj_in_stm.readByte(): 114
obj_in_stm.readByte(): 108
obj_in_stm.readByte(): 100
obj_in_stm.readByte(): 33
obj_in_stm.readByte(): 33
obj_in_stm.readByte(): 33

翻譯自: https://www.includehelp.com/java/objectinputstream-readbyte-method-with-example.aspx