DataInputStream readByte() method in Java with Examples
The readByte() method of DataInputStream class in Java is used to read and return one input byte. The byte is a signed value in the range from -128 to +127. The bytes in this method are read from the accommodated input stream.
Syntax:
public final byte readByte()
throws IOException
Specified By: This method is specified by readByte() method of DataInput interface.
Parameters: This method does not accept any parameter.
Return value: This method returns the byte value read. It is a signed 8-bit byte.
Exceptions:
- EOFException – It throws EOFException if the input stream is ended.
- IOException – This method throws IOException if the stream is closed or some other I/O error occurs.
Below programs illustrate readByte() method in DataInputStream class in IO package:
Program 1:
import java.io.*;
public class GFG {
public static void main(String[] args)
throws IOException
{
byte [] b = { 10 , 20 , 30 , 40 , 50 };
ByteArrayInputStream byteArrayInputStr
= new ByteArrayInputStream(b);
DataInputStream dataInputStr
= new DataInputStream(
byteArrayInputStr);
while (dataInputStr.available() > 0 ) {
System.out.println(
dataInputStr.readByte());
}
}
}
|
Program 2:
import java.io.*;
public class GFG {
public static void main(String[] args)
throws IOException
{
byte [] b = { - 20 , - 10 , 0 , 10 , 20 };
ByteArrayInputStream byteArrayInputStr
= new ByteArrayInputStream(b);
DataInputStream dataInputStr
= new DataInputStream(
byteArrayInputStr);
while (dataInputStr.available() > 0 ) {
System.out.println(
dataInputStr.readByte());
}
}
}
|
References:
https://docs.oracle.com/javase/10/docs/api/java/io/DataInputStream.html#readByte()
Last Updated :
05 Jun, 2020
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