Java DataInputStream readChar() Method with Example

DataInputStream Class readChar() method: Here, we are going to learn about the readChar() method of DataInputStream Class with its syntax and example.
Submitted by Preeti Jain, on March 30, 2020

DataInputStream Class readChar() method

readChar() method is available in
java.io

package.
readChar() method is used to read 2 bytes (i.e. 16 bit) of the character value and returns a character value.
readChar() 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.
readChar() method may throw an exception at the time of reading char.
- IOException: This exception may throw when this stream is not opened.
- EndOfFileException: This exception may throw when this stream has reached its endpoint.

Syntax:

    public final char readChar();

Parameter(s):

It does not accept any parameter.

Return value:

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

Example:

// Java program to demonstrate the example 
// of char readChar() method of 
// DataInputStream

import
 java
.
io
.
*
;

public
 class
 ReadCharOfDIS {
 public
 static
 void
 main(
String
[
]
 args)
 throws
 IOException
 {
  InputStream
 is_stm =
 null
;
  DataInputStream
 dis_stm =
 null
;
  FileOutputStream
 fos_stm =
 null
;
  DataOutputStream
 dos_stm =
 null
;
  byte
[
]
 b_arr =
 {
   97
,
   98
,
   99
,
   100
,
   101
  }
;

  try
 {
   // Instantiate FileInputStream, 
   // DataInputStream, FileOutputStream
   // and DataOutputStream 

   fos_stm =
 new
 FileOutputStream
(
"C:
\\
Users
\\
Preeti Jain
\\
Desktop
\\
programs
\\
includehelp.txt"
)
;
   dos_stm =
 new
 DataOutputStream
(
fos_stm)
;

   // Loop to write each byte till end
   for
 (
byte
 val:
 b_arr)
 {

    // By using writeChar() method isto
    // write a character at a time to the
    // DataOutputStream dos_stm

    dos_stm.
writeChar(
val)
;
   }


   is_stm =
 new
 FileInputStream
(
"C:
\\
Users
\\
Preeti Jain
\\
Desktop
\\
programs
\\
includehelp.txt"
)
;
   dis_stm =
 new
 DataInputStream
(
is_stm)
;

   // Loop To Read Available Data till end
   while
 (
dis_stm.
available(
)
 >
 0
)
 {

    // By using readChar() method isto read one
    // character at a time

    char
 ch =
 dis_stm.
readChar(
)
;
    System
.
out.
println(
"dis_stm.readChar(): "
 +
 ch)
;
   }
  }
 catch
 (
Exception
 ex)
 {
   System
.
out.
println(
ex.
toString(
)
)
;
  }
 finally
 {
   // To free system resources linked
   // with these streams
   if
 (
is_stm !
=
 null
)
    is_stm.
close(
)
;

   if
 (
dis_stm !
=
 null
)
    dis_stm.
close(
)
;

   if
 (
dos_stm !
=
 null
)
    dos_stm.
close(
)
;

   if
 (
fos_stm !
=
 null
)
    fos_stm.
close(
)
;
  }
 }
}

Output

dis_stm.readChar(): a
dis_stm.readChar(): b
dis_stm.readChar(): c
dis_stm.readChar(): d
dis_stm.readChar(): e

Java DataInputStream readChar() Method with Example

DataInputStream Class readChar() method

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