uk4

import java.io.;
public class Main {
static BufferedReader sc = new BufferedReader(new
InputStreamReader(System.in));
static int a[][] = new int[5][5];
public static void main(String[] args) throws NumberFormatException,
IOException {
int m = 0, n = 0;
System.out.print("Enter number of rows ");
m = Integer.parseInt(sc.readLine());
System.out.print("Enter number of columns ");
n = Integer.parseInt(sc.readLine());
if (m == n)
{
int i, j;
System.out.println("Enter values for matrix: ");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
a[i][j] = Integer.parseInt(sc.readLine());
}
}
System.out.println("Orignal Matrix :");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
System.out.print("[" + a[i][j] + "]");
}
System.out.println("");
}
int transpose[][] = new int[m][n];
System.out.println("Transpose of Matrix = ");
int i3, j3;
for (i3 = 0; i3 < m; i3++)
{
for (j3 = 0; j3 < n; j3++)
{
transpose[i3][j3] = a[j3][i3];
System.out.print("[" + transpose[i3][j3] + "]");
}
System.out.println("");
}
}
else
{
System.out.println("Rows not equal to columns");
}
}
}
Q2)
import java.awt.;
import java.awt.event.*;
class InvalidPasswordException extends Exception
{
InvalidPasswordException()
{
System.out.println(” User name and Password is not same”);
}
}
public 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”);
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)
{
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();
}
}