Java ObjectInputStream readBoolean() Method

The readBoolean() method of the java.io.ObjectInputStream class is used to read the data of Boolean type. It returns true if the byte is non zero, false if the byte is zero.

Syntax

Parameter

No parameter is passed.

Returns

true/false.

Throws

EOFException - If the end of file is reached.

IOException - If other I/O error has occurred.

Example 1

import java.io.*;
public class ObjectInputStreamreadBooleanExample1 {
     public static void main(String[] args) {
                  String str = "Hello";
                  byte[] barray = {'j', 'a', 'v', 'a', 'T', 'p', 'o', 'i', 'n', 't'};
      
                       try
                       {
                          // create a new file with an ObjectOutputStream
                          FileOutputStream outstream = new FileOutputStream("file1.txt");
                          ObjectOutputStream objoutstream = new ObjectOutputStream(outstream);

                          // writing objects str and barray to objectoutputstream
                          objoutstream.writeObject(str);
                          objoutstream.writeObject(barray);
                       
                         // create an ObjectInputStream for the file we created before
                         ObjectInputStream objinstream = new ObjectInputStream(new FileInputStream("file1.txt")); 
                          
                         System.out.println("" + (String) objinstream.readObject());
                          byte[] read1 = (byte[]) objinstream.readObject(); 
                         String s2 = new String(read1);
                         System.out.println("" + s2);
                          boolean b = objinstream.readBoolean();
                          if(b==true)
                           System.out.println("byte is non Zero" );
                          else
                            System.out.println("byte is  Zero" ); 
                       }
                       catch(Exception e){ }
                 }
}

Output:

Hello
javaTpoint
byte is non Zero

Example 2

//file1 and file2 must be present in the same project directory
package ObjectInputStream;
import java.io.*;
public class ObjectInputStreamreadBooleanExample2  {
   public static void main(String[] args) {
           try {
         // create a new file with an ObjectOutputStream
          FileInputStream instream = new FileInputStream("file1.txt");
         ObjectInputStream objinstream = new ObjectInputStream(instream);
         String str=objinstream.toString();
     
         FileOutputStream outstream = new FileOutputStream("file2.txt");
         ObjectOutputStream objoutstream = new ObjectOutputStream(outstream);

         // writing objects str and barray to objectoutputstream
         objoutstream.writeObject(str);
       
         objoutstream.flush();

         // create an ObjectInputStream for the file we created before
         ObjectInputStream objinstream2 = new ObjectInputStream(new FileInputStream("file2.txt"));

         // read and print an object and cast it as string
         System.out.println("" + (String) objinstream.readObject());

        // read and print an object and cast it as string
         byte[] read = (byte[]) objinstream.readObject();
        String s2 = new String(read);
        
         System.out.println("" + s2);
         
        boolean b = objinstream.readBoolean();
        if(b==true)
           System.out.println("byte is non Zero" );
        else
           System.out.println("byte is  Zero" ); 
      } catch (Exception ex) {
         }
   }
} 

Output: