DataInputStream readChar() method in Java with Examples Last Updated : 05 Jun, 2020 Comments Improve Suggest changes Like Article Like Report The readChar() method of DataInputStream class in Java is used to read two input bytes and returns a char value. This method basically reads the bytes as character that are written by writechar() method of DataOutputStream class. Syntax: public final char readChar() throws IOException Specified By: This method is specified by readChar() method of DataInput interface. Parameters: This method does not accept any parameter. Return value: This method returns the char value interpreted by the two bytes of input stream. Exceptions: EOFException - It throws EOFException if the input stream is ended before two bytes can be read. IOException - This method throws IOException if the stream is closed or some other I/O error occurs. Below programs illustrate readChar() method in DataInputStream class in IO package: Program 1: Assume the existence of file "demo.txt". Java // Java program to illustrate // DataInputStream readChar() method import java.io.*; public class GFG { public static void main(String[] args) throws IOException { // Create byte array byte[] buf = { 71, 69, 69, 75, 83 }; // Create file output stream FileOutputStream outputStream = new FileOutputStream("c:\\demo.txt"); // Create data output stream DataOutputStream dataOutputStr = new DataOutputStream(outputStream); for (byte b : buf) { // Write character to // the dataOutputStream dataOutputStr.writeChar(b); } dataOutputStr.flush(); // Create file input stream FileInputStream inputStream = new FileInputStream("c:\\demo.txt"); // Create data input stream DataInputStream dataInputStr = new DataInputStream(inputStream); while (dataInputStr.available() > 0) { // Print character System.out.print( dataInputStr.readChar()); } } } Output: Program 2: Assume the existence of file "demo.txt". Java // Java program to illustrate // DataInputStream readChar() method import java.io.*; public class GFG { public static void main(String[] args) throws IOException { // Create byte array byte[] buf = { 71, 69, 69, 75, 83, 70, 79, 82, 71, 69, 69, 75, 83 }; // Create file output stream FileOutputStream outputStream = new FileOutputStream("c:\\demo.txt"); // Create data output stream DataOutputStream dataOutputStr = new DataOutputStream(outputStream); for (byte b : buf) { // Write character to // the dataOutputStream dataOutputStr.writeChar(b); } dataOutputStr.flush(); // Create file input stream FileInputStream inputStream = new FileInputStream("c:\\demo.txt"); // Create data input stream DataInputStream dataInputStr = new DataInputStream(inputStream); while (dataInputStr.available() > 0) { // Print character System.out.print( dataInputStr.readChar()); } } } Output: References: https://docs.oracle.com/javase/10/docs/api/java/io/DataInputStream.html#readChar() Comment More infoAdvertise with us P pp_pankaj Follow Improve Article Tags : Java Java-Functions Java-IO package Practice Tags : Java Similar Reads BasicsIntroduction to JavaJava is a high-level, object-oriented programming language developed by Sun Microsystems in 1995. 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