import java.io.*;
class Slip1
{
public static void main(String a[]) throws Exception
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter file name ");
String f1=br.readLine();
FileReader fr = new FileReader(f1);
int ch ;
while((ch=fr.read())!= -1)
{
char c = (char)ch;
if(Character.isUpperCase(c))
{
c=Character.toLowerCase(c);
System.out.print(c);
}
else if(Character.isLowerCase(c))
{
c=Character.toUpperCase(c);
System.out.print(c);
}
else if(Character.isDigit(c))
{
System.out.println(c+"Digit");
}
else if(Character.isSpace(c))
System.out.println(c+"Space");
else
System.out.println(c);
}
fr.close();
}
}
This comment has been removed by the author.
ReplyDeletethanx sir its so useful for us
ReplyDeleteSlip4_2: Write a program to design a screen using Awt that will take a user name and password.
ReplyDeleteIf 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.*;
class InvalidPasswordException extends Exception
{
InvalidPasswordException()
{
System.out.println(" User name and Password is not same");
}
}
class PasswordDemo 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("Use Name: " ,Label.CENTER);
upass=new Label ("Password: ",Label.RIGHT);
nametext=new TextField(20);
passtext =new TextField(20);
passtext.setEchoChar(c);
msg=new TextField(10);
msg.setEditable(false);
login=new Button("Login");
MOBILE: 9730381255 | WWW.NRCLASSESPUNE.COM | WWW.BCSBCA.COM
Clear=new Button("Clear");
login.addActionListener(this);
Clear.addActionListener(this);
p.add(uname);
p.add(nametext);
p.add(upass);
p.add(passtext);
p.add(login);
p.add(Clear);
p.add(msg);
add(p);
setTitle("Login ");
setSize(290,200);
setResizable(false);
setVisible(true);
}
public void actionPerformed(ActionEvent ae)
{
Button btn=(Button)(ae.getSource());
if(attempt<3)
{
if((btn.getLabel())=="Clear")
{
nametext.setText("");
passtext.setText("");
}
if((btn.getLabel()).equals("Login"))
{
try
{
String user=nametext.getText();
String upass=passtext.getText();
if(user.compareTo(upass)==0)
{
msg.setText("Valid");
System.out.println("Username is valid");
}
else
{
throw new InvalidPasswordException();
}
}
catch(Exception e)
MOBILE: 9730381255 | WWW.NRCLASSESPUNE.COM | WWW.BCSBCA.COM
{
msg.setText("Error");
}
attempt++;
}
}
else
{
System.out.println("you are using 3 attempt");
System.exit(0);
}
}
public static void main(String args[])
{
PasswordDemo pd=new PasswordDemo();
pd.login();
}
}