Java

@@1@@

public class demo extends Thread

{

char c;

public void run()

{

for(c = 'A'; c<='Z';c++)

{

System.out.println(""+c);

try

{

Thread.sleep(3000);

}

catch(Exception e)

{

e.printStackTrace();

}

public static void main(String args[])

{

demo t = new demo();

t.start();

}

Write a Java program to accept the details of Employee (Eno, EName, Designation,Salary) from a user and store it into the database. (Use Swing)

@@@2

Write a java program to read ‘N’ names of your friends, store it into HashSet and display them in ascending order.

//Java program to count words in a string.

import java.util.Scanner;

class SortStrings

{

public static void main(String args[])

{

String temp;

Scanner SC = new Scanner(System.in);

System.out.print("Enter the value of N: ");

int N= SC.nextInt();

SC.nextLine(); //ignore next line character

String names[] = new String[N];

System.out.println("Enter names: ");

for(int i=0; i<N; i++)

{

System.out.print("Enter name [ " + (i+1) +" ]: ");

names[i] = SC.nextLine();

} for(int i=0; i<5; i++)

{

for(int j=1; j<5; j++)

{

if(names[j-1].compareTo(names[j])>0)

{

temp=names[j-1];

names[j-1]=names[j];

names[j]=temp;

}

System.out.println("\nSorted names are in Ascending Order: ");

for(int i=0;i<N;i++)

{

System.out.println(names[i]);

}}}

Design a servlet that provides information about a HTTP request from a client, such asIP-Address and browser type. The servlet also provides information about the server onwhich the servlet is running, such as the operating system type, and the names ofcurrently loaded servlets.

Java Code:

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class NewServlet extends HttpServlet

{public void doGet(HttpServletRequest req,HttpServletResponse resp)throws IOException,ServletException

{

resp.setContentType("text/html");

String userinfo=req.getHeader("User-Agent");

PrintWriter p=resp.getWriter();

}

HTML File:

<html>

<body>

Username:<input type="text" name="t1">

</form>

</body>

</html>

@@@@3@@@@

@@@@@4@@@@Write a multithreading program using Runnable interface to blink Text on the frame.

import java.awt.*;

import java.awt.event.*;

class Slip8_1 extends Frame implements Runnable

{

Thread t;

Label l1;

int f;

Slip8_1()

{

t=new Thread(this);

t.start();

setLayout(null);

l1=new Label("Hello JAVA");

l1.setBounds(100,100,100,40);

add(l1);

setSize(300,300);

setVisible(true);

f=0;

}

public void run()

{

try

{

if(f==0)

{

t.sleep(200);

l1.setText("");

f=1;

}

if(f==1)

{

t.sleep(200);

l1.setText("Hello Java");

f=0;

}

catch(Exception e)

{

System.out.println(e);

}

run();

}

public static void main(String a[])

{

new Slip8_1();

}

SLIP 16:

Create an application to store city names and their STD codes using an appropriate collection. The GUI should allow the following operations:

a. add a new city and its code(No Duplicate)

b. remove a city name and display the code.

c. search for a city name and display the code.

/* Slip16_2 */

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.util.*;

class Slip16_2 extends JFrame implements ActionListener

{

JTextField t1,t2,t3;

JButton b1,b2,b3;

JTextArea t;

JPanel p1,p2;

Hashtable ts;

Slip16_2()

{

ts=new Hashtable();

t1=new JTextField(10);

t2=new JTextField(10);

t3=new JTextField(10);

b1=new JButton("Add");

b2=new JButton("Search");

b3=new JButton("Remove");

t =new JTextArea(20,20);

p1=new JPanel();

p1.add(t);

p2= new JPanel();

p2.setLayout(new GridLayout(2,3));

p2.add(t1);

p2.add(t2);

p2.add(b1);

p2.add(t3);

p2.add(b2);

p2.add(b3);

add(p1);

add(p2);

b1.addActionListener(this);

b2.addActionListener(this);

b3.addActionListener(this);

setLayout(new FlowLayout());

setSize(500,500);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void actionPerformed(ActionEvent e)

{

if(b1==e.getSource())

{

String name = t1.getText();

int code = Integer.parseInt(t2.getText());

ts.put(name,code);

Enumeration k=ts.keys();

Enumeration v=ts.elements();

String msg="";

while(k.hasMoreElements())

{

msg=msg+k.nextElement()+" = "+v.nextElement()+"\n";

}

t.setText(msg);

t1.setText("");

t2.setText("");

}

else if(b2==e.getSource())

{

String name = t3.getText();

if(ts.containsKey(name))

{

t.setText(ts.get(name).toString());

}

else

JOptionPane.showMessageDialog(null,"City not found ...");

}

else if(b3==e.getSource())

{

String name = t3.getText();

if(ts.containsKey(name))

{

ts.remove(name);

JOptionPane.showMessageDialog(null,"City Deleted ...");

}

else

JOptionPane.showMessageDialog(null,"City not found ...");

}

public static void main(String a[])

{

new Slip16_2();

}}

@@@@@@@@@@5@@@@@@@@@@@

Write a Java Program to create the hash table that will maintain the mobile number and

student name. Display the details of student using Enumeration interface.

import java.io.*;

import java.util.*;

// Main class

class GFG {

// Main driver method

public static void main(String[] args)

{

// Creating an empty hashtable

Hashtable<String, String> ht

= new Hashtable<String, String>(); ht.put("Name", "Rohan");

ht.put("Age", "23");

ht.put("Address", "India");

ht.put("Article", "GeeksforGeeks");

Enumeration<String> e = ht.keys()

while (e.hasMoreElements()){

String key = e.nextElement();

System.out.println(key + ":" + ht.get(key));

}

}}

@@@@@@@@@6@@@@@@@@@@@

Accept “n” integers from the user and store them into the collection. Display them in the sorted order. The collection should not accept duplicate elements (Use suitable collection). Search for the particular element using predefined search method in the collection framework.

import java.util.*;

import java.io.*;

class Slip19_2

{

public static void main(String[] args) throws Exception

{

int no,element,i;

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

TreeSet ts=new TreeSet();

System.out.println("Enter the of elements :");

no=Integer.parseInt(br.readLine());

for(i=0;i<no;i++) {

System.out.println("Enter the element : ");

element=Integer.parseInt(br.readLine());

ts.add(Element);} System.out.println("The elements in sorted order :"+ts); System.out.println("Enter element to be serach : ");

element = Integer.parseInt(br.readLine());

if(ts.contains(element))

System.out.println("Element is found");

else

System.out.println("Element is NOT found");

}}

Write a java program to simulate traffic signal using threads.

import java.applet.*;

import java.awt.*;

class Slip3_2 extends Applet implements Runnable

{

Thread t;

int r,g1,y,i;

public void init()

{

T=new Thread(this);

t.start();

r=0; g1=0;I=0; y=0;

}

public void run()

{

try

{

for(I =24; I >=1;i--)

{

if (I >16&& I <=24)

{

t.sleep(200);

r=1;

repaint();

}

if (I >8&& I <=16)

{

t.sleep(200);

y=1;

repaint();

}

if(I >1&& I <=8)

{

t.sleep(200);

g1=1;

repaint();

}

if (I ==0)

{

run();

}

catch(Exception e)

{ System.out.println(e);

}

} public void paint(Graphics g)

{

g.drawRect(100,100,100,300);

if (r==1)

{

g.setColor(Color.red);

g.fillOval(100,100,100,100);

g.setColor(Color.black);

g.drawOval(100,200,100,100);

g.drawOval(100,300,100,100);

r=0;

}

if (y==1)

{

g.setColor(Color.black);

g.drawOval(100,100,100,100);

g.drawOval(100,300,100,100);

g.setColor(Color.yellow);

g.fillOval(100,200,100,100);

y=0;

}

if (g1==1)

{

g.setColor(Color.black);

g.drawOval(100,100,100,100);

g.drawOval(100,200,100,100);

g.setColor(Color.green);

g.fillOval(100,300,100,100);

g1=0;

}

@@@@@@@@@@@@7@@@@@@@@@@

@@@@@@@@@8@@@@@@@@@@/*SLIP11*/

import java.io.*;

import java.lang.String.*;

class Ass_seta3 extends Thread

{

String msg="";

int n;

Ass_seta3(String msg,int n)

{

this.msg=msg;

this.n=n;

}

public void run()

{

try

{ for(int i=1;i<=n;i++)

{

System.out.println(msg+" "+i+" times");

}

System.out.println("\n ");

}

catch(Exception e){}

}}

class Slip11_2

{

public static void main(String a[])

{

int n=Integer.parseInt(a[0]);

Ass_seta3 t1=new Ass_seta3("I am in FY",n);

t1.start();

Ass_seta3 t2=new Ass_seta3("I am in SY",n+10);

t2.start();

Ass_seta3 t3=new Ass_seta3("I am in TY",n+20);

t3.

start();

}}

2.Write a JSP program to check whether a given number is prime or not. Display the result

in red color.

<html>

<head>

</head>

<body>

Enter Number :

</form>

</body>

</html>

JSP FILE :Slip30.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>

int n = Integer.parseInt(request.getParameter("num"));

intnum,i,count;

for(num=1;num<=n;num++)

{

count=0;

for(i=2;i<=num/2;i++)

{

if(num%i==0)

{

count++;

break;

}

if(count==0 &&num!=1)

{

<html>

<body>

</body>

</html>

}

@@@@@@@@@@@@9@@@@@@@@@. Write a Java program to create a thread for moving a ball inside a panel vertically. The

ball should be created when the user clicks on the start button.

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class boucingthread extends JFrame implements Runnable

{

Thread t;

int x,y;

boucingthread()

{

super();

t= new Thread(this);

x=10;

y=10;

t.start();

setSize(1000,200);

setVisible(true);

setTitle("BOUNCEING BOLL WINDOW");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void run()

{

try

{

while(true)

{

x+=10;

y+=10;

repaint();

Thread.sleep(1000);

}

}catch(Exception e)

{

}

public void paint(Graphics g)

{

g.drawOval(x,y,7,7);

}

public static void main(String a[])throws Exception

{

boucingthread t=new boucingthread();

Thread.sleep(1000);

}

@@@@@@@#######(15)######£@@@###@@

VisitServlet.java

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class VisitServlet extends HttpServlet

{

static int i=1;

public void doGet(HttpServletRequest request,HttpServletResponse response)

throws IOException,ServletException

{

response.setContentType("text/html");

PrintWriter out=response.getWriter();

String k=String.valueOf(i);

Cookie c=new Cookie("visit",k);

response.addCookie(c);

int j=Integer.parseInt(c.getValue());

if(j==1)

{

out.println("Welcome to web page ");

}

else {

out.println("You are visited at "+i+" times");

}

i++;

}

Web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app>

<servlet-name>VisitServlet</servlet-name>

<servlet-class>VisitServlet</servlet-class>

</servlet>

36<servlet-mapping>

<servlet-name>VisitServlet</servlet-name>

<url-pattern>/VS</url-pattern>

</servlet-mapping>

</web-app>

@@@###########(17))########@@@@@

Student.html

<html>

<body>

<legend><b><i>Enter Student Details :</i><b></legend>

Enter Roll No :&nbsp <input type="text" name="txtsno"><br><br>

Enter Name :&nbsp &nbsp <input type="text" name="txtnm"><br><br>

Enter class :&nbsp &nbsp &nbsp <input type="text" name="txtclass"><br><br>

<legend><b><i>Enter Student Marks Details :</i><b></legend>

Subject 1 :&nbsp &nbsp &nbsp <input type="text" name="txtsub1"><br><br>

Subject 2 :&nbsp &nbsp &nbsp <input type="text" name="txtsub2"><br><br>

Subject 3 :&nbsp &nbsp &nbsp <input type="text" name="txtsub3"><br><br>

</fieldset>

</div>

</form>

</body>

</html>

Student.php

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class Student extends HttpServlet

{

public void doPost(HttpServletRequest req,HttpServletResponse res)throws IOException,ServletException

{

int sno,s1,s2,s3,total;

String snm,sclass;

float per;

40 res.setContentType("text/html");

PrintWriter out=res.getWriter();

sno=Integer.parseInt(req.getParameter("txtsno"));

snm=req.getParameter("txtnm");

sclass=req.getParameter("txtclass");

s1=Integer.parseInt(req.getParameter("txtsub1"));

s2=Integer.parseInt(req.getParameter("txtsub2"));

s3=Integer.parseInt(req.getParameter("txtsub3"));

total=s1+s2+s3;

per=(total/3);

out.println("<html><body>");

out.print("<h2>Result of student</h2><br>");

out.println("<b><i>Roll No :</b></i>"+sno+"<br>");

out.println("<b><i>Name :</b></i>"+snm+"<br>");

out.println("<b><i>Class :</b></i>"+sclass+"<br>");

out.println("<b><i>Subject1:</b></i>"+s1+"<br>");

out.println("<b><i>Subject2:</b></i>"+s2+"<br>");

out.println("<b><i>Subject3:</b></i>"+s3+"<br>");

out.println("<b><i>Total :</b></i>"+total+"<br>");

out.println("<b><i>Percentage :</b></i>"+per+"<br>");

if(per<50)

out.println("<h1><i>Pass Class</i></h1>");

else if(per<55 && per>50)

out.println("<h1><i>Second class</i></h1>");

else if(per<60 && per>=55)

out.println("<h1><i>Higher class</i></h1>");

out.close();

}

@@@@@@#####(19)@@#############

UserPass.java

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.sql.*;

public class UserPass extends HttpServlet

{

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws IOException, ServletException

{

PrintWriter out = response.getWriter();

try{

String us=request.getParameter("user");

String pa=request.getParameter("pass");

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

Connection cn=DriverManager.getConnection("jdbc:odbc:dsn2","","");

Statement st=cn.createStatement();

ResultSet rs=st.executeQuery("select * from UserPass");

while(rs.next())

{

if(us.equals(rs.getString("user"))&&pa.equals(rs.getString("pass")))

out.println("Valid user");

else

out.println("Invalid user");

}

}catch(Exception e)

{

out.println(e);

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws IOException, ServletException

{

doGet(request, response);

}

@@@@@@@@####(27)####@@@@@@@

import java.util.*;

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class MyServlet extends HttpServlet {

public void doGet(HttpServletRequest req, HttpServletResponse res)

throws ServletException, IOException {

res.setContentType("text/html");

PrintWriter out = res.getWriter();

// Get the current session object, create one if necessary

HttpSession session = req.getSession();

out.println("<HTML><HEAD><TITLE>SessionTimer</TITLE></HEAD>");

out.println("<BODY><H1>Session Timer</H1>");

// Display the previous timeout

out.println("The previous timeout was " +

session.getMaxInactiveInterval());

out.println("<BR>");

// Set the new timeout

session.setMaxInactiveInterval(2*60*60); // two hours

// Display the new timeout

out.println("The newly assigned timeout is " +

session.getMaxInactiveInterval());

out.println("</BODY></HTML>");

}

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