Java ObjectInputStream readLine() Method with Examples

by Online Tutorials Library July 22, 2022

Java ObjectInputStream readLine() Method

The readLine() method of ObjectInputStream class reads a line that has been terminated by a n, r, rn or EOF.

Syntax

Parameter

No parameter is passed.

Returns

A String copy of the line.

Throws

IOException – If other I/O error has occurred.

Example 1

  import java.io.DataInputStream;  import java.io.DataOutputStream;  import java.io.FileInputStream;  import java.io.FileOutputStream;  import java.io.IOException;  import java.io.InputStream;    public class ObjectInputStreamreadLineExample1  {     public static void main(String[] args) throws IOException {                String[] buf = {“TutorAspire” , ”  “,”provide” , ”  “,”Tutorial” ,”  “, “for”  ,”  “,”all” ,” “, “language”, “n” };                try {           // create file output stream         FileOutputStream   fileoutstream = new FileOutputStream(“file1.txt”);                      // create data output stream          DataOutputStream dataoutstream = new DataOutputStream(fileoutstream);                      // for each byte in the buffer           for (String b:buf) {              // write character to the dos              dataoutstream.writeChars(b);           }                      // force bytes to the underlying stream           dataoutstream.flush();                      // create file input stream           InputStream inpstream = new FileInputStream(“file1.txt”);                      // create new data input stream          DataInputStream datainpstream = new DataInputStream(inpstream);                      // read till end of the stream                                  // read character              String c = datainpstream.readLine();                            // print              System.out.print(c);                              } catch(Exception e) {                         e.printStackTrace();        }      }  }  

Output:

TutorAspire provide tutorial for all language

Example 2

  import java.io.DataInputStream;  import java.io.DataOutputStream;  import java.io.FileInputStream;  import java.io.FileOutputStream;  import java.io.IOException;  import java.io.InputStream;    public class ObjectInputStreamreadLineExample2 {     public static void main(String[] args) throws IOException {                String[] carray = {“TutorAspire” , ”  “,”provide” , ”  “,”Tutorial” ,”  “, “for”  ,”  “,”all” ,” “, “language” ,”n”};                       try {           // create file output stream         FileOutputStream   fileoutstream = new FileOutputStream(“barray”);                      // create data output stream          DataOutputStream dataoutstream = new DataOutputStream(fileoutstream);                      // for each byte in the buffer           for (String b:carray) {              // write character to the dos              dataoutstream.writeChars(b);           }                      // force bytes to the underlying stream           dataoutstream.flush();                      // create file input stream           InputStream inpstream = new FileInputStream(“barray”);                      // create new data input stream          DataInputStream datainpstream = new DataInputStream(inpstream);                      // read till end of the stream           for(int i=0;i<=carray.length;i++){                          // read double values in float format              String c = datainpstream.readLine();                            // print              System.out.print(”    “+c);           }                   } catch(Exception e) {                  }      }  }  

Output:

TutorAspire provide tutorial for all language

Next TopicJava ObjectInputStream

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