Java ObjectInputStream readByte（）方法与示例

ObjectInputStream类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()方法用于从此ObjectInputStream读取一个字节(即8位)的数据。
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()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。
readByte() method may throw an exception at the time of reading byte.
readByte()方法在读取字节时可能会引发异常。
- IOException: This exception may throw when getting any input/output error while performing.IOException ：在执行过程中遇到任何输入/输出错误时，可能引发此异常。
- EOFException: This exception may throw when the end of the file is reached.EOFException ：到达文件末尾时，可能会引发此异常。

Syntax:

句法：

    public byte readByte();

Parameter(s):

参数：

It does not accept any parameter.
它不接受任何参数。

Return value:

返回值：

The return type of the method is byte, it returns the byte value read.

该方法的返回类型为byte ，它返回读取的字节值。

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

输出量

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