Java.io.ObjectInputStream.readUTF() Method

---

---

Description

The java.io.ObjectInputStream.readUTF() method reads a String in modified UTF-8 format.

Declaration

Following is the declaration for java.io.ObjectInputStream.readUTF() method.

public String readUTF()

Parameters

NA

Return Value

This method returns the String.

Exception

• UTFDataFormatException − If read bytes do not represent a valid modified UTF-8 encoding of a string.

• IOException − If there are I/O errors while reading from the underlying InputStream.

Example

The following example shows the usage of java.io.ObjectInputStream.readUnsignedShort() method.

package com.tutorialspoint;

import java.io.*;

public class ObjectInputStreamDemo {
   public static void main(String[] args) {
      String s = "Hello World!";
      
      try {
         // create a new file with an ObjectOutputStream
         FileOutputStream out = new FileOutputStream("test.txt");
         ObjectOutputStream oout = new ObjectOutputStream(out);

         // write something in the file
         oout.writeUTF(s);
         oout.writeUTF("This is an example");
         oout.flush();

         // create an ObjectInputStream for the file we created before
         ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

         // read and print the string
         System.out.println("" + ois.readUTF());

         // read and print the string
         System.out.println("" + ois.readUTF());
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Hello World!
This is an example