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    Shoda Indiano
    The code defines a ButtonDemo1 applet class that implements the ActionListener interface. It initializes three buttons labeled "Red", "Green", and "Blue", and adds them to the applet. When a button is clicked, its action listener will change the applet background color to match the button label. It will also call repaint() to redraw the applet with the new background color.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    Untitled

    Uploaded by

    Shoda Indiano
    20 views48 pages
    The code defines a ButtonDemo1 applet class that implements the ActionListener interface. It initializes three buttons labeled "Red", "Green", and "Blue", and adds them to the applet. When a button is clicked, its action listener will change the applet background color to match the button label. It will also call repaint() to redraw the applet with the new background color.

    Original Description:

    Copyright

    © © All Rights Reserved

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    The code defines a ButtonDemo1 applet class that implements the ActionListener interface. It initializes three buttons labeled "Red", "Green", and "Blue", and adds them to the applet. When a button is clicked, its action listener will change the applet background color to match the button label. It will also call repaint() to redraw the applet with the new background color.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    20 views48 pages

    Untitled

    Uploaded by

    Shoda Indiano
    The code defines a ButtonDemo1 applet class that implements the ActionListener interface. It initializes three buttons labeled "Red", "Green", and "Blue", and adds them to the applet. When a button is clicked, its action listener will change the applet background color to match the button label. It will also call repaint() to redraw the applet with the new background color.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 48

    What will be the output of following code?

    import java.awt.*;

    import java.applet.*;

    import java.awt.event.*;

    public class ButtonDemo1 extends Applet implements ActionListener


    {

    String msg=" ";

    Button b1,b2,b3;

    public void init()

    b1=new Button("Red");

    b2=new Button("Green");

    b3=new Button("Blue");

    add(b1);

    add(b2);

    add(b3);

    b1.addActionListener(this);

    b2.addActionListener(this);

    b3.addActionListener(this);

    public void actionPerformed(ActionEvent ae)

    String str=ae.getActionCommand();

    if (str.equals("Red"))

    setBackground(Color.red);

    else if (str.equals("Green"))

    setBackground(Color.green);
    }

    else if (str.equals("Blue"))

    setBackground(Color.blue);

    repaint();

    public void paint(Graphics g)

    g.drawString(msg,0,100);

    /*<applet code="ButtonDemo1.class" width=200 height=400>


    </applet>*/

    Find the missing statement in the program.

    /*

    <APPLET Code="InnerClassDemo" Width=200 Height=250>

    </APPLET>

    */

    public class InnerClassDemo extends Applet

    public void init()

    addMouseListener(new MyMouseAdapter());

    class MyMouseAdapter extends MouseAdapter


    {

    public void mousePressed(MouseEvent me)

    showStatus("Mouse Pressed")

    The following program will display _____________________

    import java.net.*;

    public class MyNetwork

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


    {

    InetAddress ip [] = InetAddress.getAllByName("www.google.com");

    for(int i=0;i<ip.length;i++)

    System.out.println(ip[i].getHostAddress());

    What is output of following code: import java.io.*;

    import java.net.*;

    public class portscanner

    public static void main(String args[])

    {
    String host=”localhost”;

    for(int i=0;i<1024;i++)

    try{

    Socket s= new Socket(host,i);

    System.out.println(“There is server on port” +i+ ”of” +host);

    catch(UnknownHostexception ex)

    Break;

    catch(IOException e){}

    }
    Consider the following program.

    What should be the correction done in the program to get correct output?

    import java.sql.*;

    class Ddemo1

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

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

    Connection c=DriverManager.getConnection();

    Statement s=c.createStatement();

    ResultSet rs=s.executeQuery("select *from StudTable");

    System .out.println("Name" + " t " + "Roll_No" + " t " + "Avg");

    while(rs.next())

    System.out.println(rs.getString(1)+" t "+rs.getInt(2)+" t t"+rs.getDouble(3));


    }

    s.close();

    c.close();

    Observe following code and find out missing statement.

    import java.io.*;

    import java.sql.*;

    class updatdb

    {public static void main(String args[])

    {try

    {Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con =DriverManager.getConnection("jdbc:odbc:stud");

    Statement s = con.createStatement();

    int r = s.executeUpdate("update stud set name=priti where name='preety'");

    System.out.println("No. of row updated:"+r)

    ResultSet rs=s.executeQuery("select * from stud");

    while(rs.next())

    {System.out.println(rs.getInt(1)+" "+rs.getString(2)+" "+rs.getInt(3));

    con.close();

    catch(Exception e){ }

    }
    Consider the following program and identify the missing statement.
    public class SimpleDemo

    { public static void main(String[] args)

    Connection con=null;

    Statement stmt=null;

    ResultSet rs=null;

    try

    { String jdbcurl="jdbc:mysql://localhost:3306/test";

    con=DriverManager.getConnection(jdbcurl, "root", "root");

    System.out.println("Connection established");

    stmt=con.createStatement();

    rs=stmt.executeQuery("select * from emp");

    System.out.println("Empid t Emap name t City t Salary");

    while(rs.next())

    System.out.print(rs.getInt(1)+"t");

    System.out.print(rs.getString(2)+"t");

    System.out.print(rs.getString(3)+"t");

    System.out.print(rs.getFloat(4));

    System.out.println();

    catch(ClassNotFoundException e) { e.printStackTrace();}

    catch(SQLException e) {e.printStackTrace()}

    finally
    {try {

    rs.close();

    stmt.close();

    con.close();

    catch(Exception e){}

    }} }
    Consider following code.Fill _____________statement in following code from option given below

    import java.io.*;

    import javax.servlet.*;

    import javax.servlet.http.*;

    public class CookieExample extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)

    throws IOException, ServletException

    response.setContentType("text/html");

    PrintWriter out = response.getWriter();

    Cookie[] cookies = request.getCookies();

    for (int i = 0; i < cookies.length; i++) {

    Cookie c = cookies[i];
    String name = c.getName();

    String value = c.getValue();

    out.println(name + " = " + value);

    String name = ______________________

    if (name != null && name.length() > 0) {

    String value = request.getParameter("cookieValue");

    Cookie c = new Cookie(name, value);

    response.addCookie(c);

    }
    following servlet read parameters passed through the html page. Write the correct HTML code for given
    servlet. Import jba. Io.*;

    import java.util.&;

    import javax.servlet.*;

    public class Example2servlet extends Generic servlet {

    public viod serice request reg, ServletResponse res) throws ServletException, IOException {

    PrintWriter pw = res.getWriter();

    Enumeration E= reg.get PaarameterNames();

    while ( e. has More Elecment()) {

    strignpaname =(string)e.nextElecment(); pw.printin(pname+="");

    String pvalue = req.getParameter(pname);

    pw . printIn (pvalue); } pw. close();

    <html> <head> <title><title> <meta htt-equiv="Content-type" content ="text/html; charset= UTF-8">


    </head> <body> <form name = "forml" method ="post" action =
    http://localhost:8080/WebApplication1/Example2Servlet> <table>
    _____________________________________ ___________________________________
    ______________________________</table> <input type = "subit" value = "submit" > </body> </html>

    In following Java program fill statement showing *** . Select any one option from given options
    import java.io.*;

    import java.util.*;

    import javax.servlet.*;

    import javax.servlet.http.*;

    public class DateServlet extends HttpServlet{

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,


    IOException{

    HttpSession hs = *****************

    response.setContentType(“text/html”);

    PrintWriter pw=response.getWriter();

    pw.print(“<B>”);

    Date date= (Date)hs.getAttribute(“date”);


    if(date!=null){

    pw.print(“Last access:”+date+”<br>”);

    date =new Date();

    hs.setAttribute(“date”, date);

    pw.println(“Current date:”+date);

    }
    }

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