emails.txt. Now the java program came in to the picture and we should use java.io package to write or read file operations. In addition i am taking java.util.HashSet and java.util.regex packages to start our program. Here we are reading a text file containing emails with text and writing into another text file this is called deserialization and serialization.
InflaterInputStream iis = new InflaterInputStream(fis);
DeflaterOutputStream dos = new DeflaterOutputStream(fos);
FileOutputStream fos = new FileOutputStream("hello2.dat");
byte b[] = str.getBytes();
fos.write(b);
fos.close();
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
package javabynataraj.iopack;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
public class FileArgs {
public static void main(String[] args)throws IOException {
int ch;
String fname;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter file name: ");
fname = br.readLine();
FileInputStream fis = new FileInputStream(fname);
BufferedInputStream bis = new BufferedInputStream(fis);
while((ch=bis.read())!=-1){
System.out.print((char)ch);
}
fis.close();
bis.close();
}
}
 |
| BufferedOutputStream working flow |
String str="hi this is muralidhar";
FileOutputStream fos=new FileOutputStream("hello.dat");BufferedOutputStream bos = new BufferedOutputStream(fos);
package javabynataraj.iopack;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class BufferedOutput {
public static void main(String[] args) {
String str="hi this is muralidhar";
try{
FileOutputStream fos=new FileOutputStream("hello.dat");
BufferedOutputStream bos = new BufferedOutputStream(fos);
byte by[] = str.getBytes();
bos.write(by);
bos.close();
fos.close();
System.out.println("Done........!");
}
catch(IOException ioe){
ioe.printStackTrace();
}
}
}
obj.getBytes[];
package javabynataraj.iopack;
import java.io.FileOutputStream;
import java.io.IOException;
public class FileOutput {
public static void main(String[] args) {
String str = "Hello how are you";
try{
FileOutputStream fos = new FileOutputStream("stud.dat");
byte b[] = str.getBytes();
fos.write(b);
fos.close();
System.out.println("Hello World");
}catch(IOException ioe){
ioe.printStackTrace();
}
}
}
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
File fromFile = new File("Emp.ser");FileInputStream fis = new FileInputStream(fromFile);
ObjectInputStream ois = new ObjectInputStream(fis);
Employee emp = (Employee) ois.readObject();
package javabynataraj.iopack;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
public class Deserial {
public static void main(String arg[]) {
File fromFile = new File("Emp.ser");
try {
FileInputStream fis = new FileInputStream(fromFile);
ObjectInputStream ois = new ObjectInputStream(fis);
Employee emp = (Employee) ois.readObject();
System.out.println("Deserialized data: \n"+ emp.eno + " "+ emp.ename +" "+ emp.esal+" "+emp.eaddr+ " from Emp.ser");
ois.close();
} catch(IOException e) {
System.out.println("Deserialization failed");
System.out.println(e);
System.exit(1);
} catch(ClassNotFoundException e) {
System.out.println("Deserialization failed");
System.out.println(e);
System.exit(1);
}
}
}
class SerialDemo implements java.io.Serializable.
+notes+Part-II_JavabynataraJ+copy.png)
