Java Programs and JSP Applications for Students

Thursday 17 August 2023

15. Java Program to demonstrate MouseWheelMoved Event.

// 15. Java Program to demonstrate MouseWheelMoved event.

import java.awt.Color;
import java.awt.Container;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import javax.swing.JFrame;
import java.awt.*;

public class WheelEx2 extends JFrame
{
     public WheelEx2()
   {
        final Container cPane = getContentPane();
        MouseWheelListener mouseWheelListener = new MouseWheelListener()
        {
            Label lb=new Label();
            public void mouseWheelMoved(MouseWheelEvent event)
            {
                lb.setBounds(20,50,100,20);
                lb.setFont(new Font("Verdana", Font.BOLD, 18));
                add(lb);
                int direction=event.getWheelRotation();
                if(direction<0)
                    lb.setText("UP");
                else
                    lb.setText("Down");
            }

        };

        cPane.addMouseWheelListener(mouseWheelListener);
        cPane.setBackground(Color.GRAY);
        cPane.setForeground(Color.RED);
   }
    public static void main(String args[])
   {

        JFrame jFrame = new WheelEx2();

        jFrame.setSize(600, 400);

        jFrame.setVisible(true);
    }
}

Thursday 16 February 2023

B13.(New) PHP Program to read data from MySQL table and calculate attendance percentage & Attendance Shortage.

<html>

<head>

<title>Read data and update mysql table using php </title>

</head>

<body bgcolor=gray text=yellow>

<?php

// Establish Connection with Server

$connection = mysql_connect("localhost", "root", "");

// Selecting Database

$db = mysql_select_db("test", $connection);

//MySQL Query to read data

$query = mysql_query("select * from prog13", $connection);

echo "<h3>Student Attendance Details</h3>";

echo "<table border=3 cellspacing=5>";

echo"<tr><th>RegNo</th><th>StudentName</th><th>Subject</th><th>ClassesHeld</th><th>ClassesAttended</th><th>AttendancePercentage</th><th>AttendanceShortage</th></tr>";

while ($row = mysql_fetch_array($query))

{

echo "<tr><td>".$row['RegNo']."</td>";

echo "<td>".$row['StudentName']."</td>";

echo "<td>".$row['Subject']."</td>";

echo "<td>".$row['ClassesHeld']."</td>";

echo "<td>".$row['ClassesAttended']."</td>";

echo "<td>".$row['AttendancePercentage']."</td>";

$reg=$row['RegNo'];

$CH=$row['ClassesHeld'];

$CA=$row['ClassesAttended'];

$per=($CA/$CH)*100;

if($per<75)$status='YES';

else $status='NO';

echo "<td>".$status."</td></tr>";

//Query for updation with calculated percentage.

$query1 = mysql_query("update prog13 set AttendancePercentage='".$per."'where RegNo='".$reg."';",$connection);

//Query to reset AttendancePercentage to zero.

//$query1 = mysql_query("update prog13 set AttendancePercentage=0 where RegNo='".$reg."';",$connection);

}

echo "<table border=3>";

echo "<br><b>MySQL table updated successfully.</b>";

mysql_close($connection); // Closing Connection with Server

</body>

</html>

Sunday 21 August 2022

B8. NEP Java Program to create Menu Bar and Pull-Down Menus.

// ProgB8. NEP Java Program to create Menu Bar and Pull-Down Menus.

import java.awt.*;

class ProgB8

{

ProgB8()

{

Frame f= new Frame("Menu Bar and Pull Down Menus");

MenuBar mb=new MenuBar();

Menu menu=new Menu("MainMenu");

Menu submenu=new Menu("SubMenu");

MenuItem i1=new MenuItem("Item1");

MenuItem i2=new MenuItem("Item2");

MenuItem i3=new MenuItem("Item3");

MenuItem i4=new MenuItem("Item4");

MenuItem i5=new MenuItem("Item5");

menu.add(i1);

menu.add(i2);

menu.add(i3);

submenu.add(i4);

submenu.add(i5);

menu.add(submenu);

mb.add(menu);

f.setMenuBar(mb);

f.setSize(500,500);

f.setLayout(null);

f.setVisible(true);

f.setBackground(Color.blue);

}

public static void main(String args[])

{

new ProgB8();

}

B7. NEP Java program to demonstrate various mouse handling events using suitable example.

// ProgB7. NEP Java program to demonstrate various mouse handling events using suitable example.

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

<applet code="ProgB7" height="300" width="500">

</applet>

public class ProgB7 extends Applet implements MouseListener

{

Font f1;

String msg="Demonstration of Mouse Events";

public void init()

{

f1 = new Font("Georgia",Font.BOLD,22);

addMouseListener(this);

}

public void mouseClicked(MouseEvent me)

{

msg = "Mouse Clicked";

repaint();

}

public void mousePressed(MouseEvent me)

{

msg = "Mouse Pressed";

repaint();

}

public void mouseReleased(MouseEvent me)

{

msg = "Mouse Released";

repaint();

}

public void mouseEntered(MouseEvent me)

{

msg = "Mouse Entered";

repaint();

}

public void mouseExited(MouseEvent me)

{

msg = "Mouse Exited";

repaint();

}

public void paint(Graphics g)

{

g.setColor(Color.blue);

g.setFont(f1);

g.drawString(msg,20,20);

}

B6. NEP Java Program to create a window when we press M or m the window displays Good Morning, A or a the window displays Good After Noon

/* B6. NEP Java Program to create a window when we press M or m the window displays Good Morning, A or a the window displays Good After Noon E or e the window displays Good Evening, N or n the window displays Good Night */

import java.awt.*;

import java.applet.*;

import java.awt.event.*;

/*<applet code="ProgB6" width=500 height=500> </applet>*/

public class ProgB6 extends Applet implements KeyListener

{

String msg="Press M or A or E or N";

int X=10,Y=20;

Font f1;

public void init()

{

f1= new Font("Georgia",Font.BOLD, 22);

addKeyListener(this);

}

public void keyPressed(KeyEvent ke)

{

int key=ke.getKeyCode();

switch(key)

{

case KeyEvent.VK_M: msg="Good Morning!";

break;

case KeyEvent.VK_A: msg="Good Afternoon!";

break;

case KeyEvent.VK_E: msg="Good Evening!";

break;

case KeyEvent.VK_N: msg="Good Night!";

break;

}

repaint();

}

public void keyReleased(KeyEvent ke)

{

//showStatus("Key UP");

}

public void keyTyped(KeyEvent ke)

{

repaint();

}

public void paint(Graphics g)

{

g.setFont(f1);

g.setColor(Color.blue);

g.drawString(msg,X,Y);

}

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Java Programs and JSP Applications for Students

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Thursday 17 August 2023

15. Java Program to demonstrate MouseWheelMoved Event.

Thursday 16 February 2023

B13.(New) PHP Program to read data from MySQL table and calculate attendance percentage & Attendance Shortage.

Sunday 21 August 2022

B8. NEP Java Program to create Menu Bar and Pull-Down Menus.

B7. NEP Java program to demonstrate various mouse handling events using suitable example.

B6. NEP Java Program to create a window when we press M or m the window displays Good Morning, A or a the window displays Good After Noon

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