Skip to main content

Accept the names of two files and copy the contents of the first to the second. First file having Book name and Author name in file. Second file having the contents of First file and also add the comment ‘end of file’ at the end.


 import java.io.*;

import java.util.*;

class Copy
{
      public static void main(String args[])throws IOException
      {
             Scanner sc=new Scanner(System.in);
             System.out.println("Source file name :\n");
             String file1=sc.next();
             System.out.println("Destination file name :\n");
             String file2=sc.next();
             FileReader fin=new FileReader(file1);
             FileWriter fout=new FileWriter(file2,true);
             
             int c;
             while((c=fin.read())!=-1)
             {
                   fout.write(c);
             }
             System.out.println("End of file...");
             fin.close();
             fout.close();
      }
}

Comments

Post a Comment

Popular posts from this blog

Write a program to read book information (bookid, bookname, bookprice, bookqty) in file “book.dat”. Write a menu driven program to perform the following operations using Random access file: i. Search for a specific book by name. ii. Display all book and total cost

  import java . io .*; import java . util .*; class Book {       String name , id ;       int qty ;       double price , total ;       Book ( String i , String n , String p , String q )      {               name = n ;               id = i ;               qty = Integer . parseInt ( q );               price = Double . parseDouble ( p );               total = qty * price ;      }       public String toString ()      {               System . out . println ( "name\t id\t qty\t price\t total" );               String s = name + "\t" + id + "\t" + qty + "\t" + price + "\t" + total ;           ...
Post a Comment
Read more

Write a Java program to design a screen using Awt that will take a user name and password. If the user name and password are not same, raise an Exception with appropriate message. User can have 3 login chances only. Use clear button to clear the TextFields.

  import java . awt .*; import java . awt . event .*; import javax . swing .*; class InvalidPasswordException extends Exception {       InvalidPasswordException ()       {             System . out . println ( "Username and password is not same" );       } } public class Password extends Frame implements ActionListener {       Label uname , upass ;       TextField nametext ;       TextField passtext , msg ;       Button login , Clear ;       Panel p ;       int attempt = 0 ;       char c = '*' ;             public void login ()       {             p = new Panel ();             uname = new Label ( "Username : " , Label . CENTER );             upass = n...
Post a Comment
Read more

) Create the following GUI screen using appropriate layout managers. Accept the name, class , hobbies of the user and apply the changes and display the selected options in a text box.

  import javax.swing.*; import java.awt.*; import java.awt.event.*; class Swing2 extends JFrame implements ActionListener {     JLabel l1 , l2 , l3 ;         JButton b ;         JRadioButton r1 , r2 , r3 ;         JCheckBox c1 , c2 , c3 ;         JTextField t1 , t2 ;         ButtonGroup b1 ;         JPanel p1 , p2 ;     static int cnt ;         private StringBuffer s1 = new StringBuffer ();                 Swing2 ()         {                             b1= new ButtonGroup ();                 p1= new JPanel ();                 p2= new JPanel ();               ...
Post a Comment
Read more