Java ObjectInputStream readBoolean() Method with Examples

by Online Tutorials Library July 22, 2022

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 TutorAspire 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:

Hello TutorAspire byte is  Zero

Next TopicJava ObjectInputStream

available()close()defaultReadObject()java objectinputstream read()readBoolean()readChar()readClassDescriptor()readFloat()readLong()readshort()