Write a Java program to display given extension files from a specific directory on server machine.

 DOWNLOAD     SLIP14Q2

/**
 * STEPS TO RUN CODE 
 * Step 01 compile the code
 * Step 02 run the code
 * Step 03 give a file directory location to find file
 * Step 04 give a file extension name without (.)
 * and then u will get all file names
 */

import java.io.*;

/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 20:44
 * Purpose of class : Write a Java program to display
 * given extension files from a specific directory on
 * server machine.
 */
public class Slip14Q2 {
    public static void main(String[] args) throws IOException {
        String userFileExtension = "";

        BufferedReader bufferedInputStream = new BufferedReader(
                new InputStreamReader(System.in));
        System.out.println("GIVE A FILE LOCATION TO FIND SPECIFIC TYPE OF FILE");
        String userFileLocation = bufferedInputStream.readLine();
        File fileLocation = new File(userFileLocation);
        if (fileLocation.exists()) {
            System.out.println("\nGIVE A FILE EXTENSION TO FIND IN GIVEN DIRECTORY");
            userFileExtension = bufferedInputStream.readLine();
            String finalUserFileExtension = userFileExtension;

            String[] filenamesInDIR = fileLocation.list(new FilenameFilter() {
                @Override
                public boolean accept(File dir, String name) {
                    if (name.toLowerCase().endsWith("." + finalUserFileExtension)) {
                        return true;
                    } else {
                        return false;
                    }
                }
            });
            assert filenamesInDIR != null;
            if(filenamesInDIR.length!=0){
                for (String fileName:filenamesInDIR){
                    System.out.println(fileName);
                }
            }else {
                System.out.println("THERE IS NO FILE OF THAT EXTENSION");
            }
        }else {
            System.out.println("THIS FILE NOT EXIST IF YOU WANT TO RECHECK THEN TYPE 'Y' OR 'N'.");
            String recheckOption = bufferedInputStream.readLine();
            if("Y".equals(recheckOption.toUpperCase())){
                main(args);
            }
        }
    }
}

Write a program in java which will show lifecycle (creation, sleep, and dead) of a thread. Program should print randomly the name of thread and value of sleep time. The name of the thread should be hard coded through constructor. The sleep time of a thread will be a random integer in the range 0 to 4999.

 DOWNLOAD       SLIP12Q2

/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 20:21
 * Purpose of class : Write a program in java
 * which will show lifecycle (creation, sleep, and dead)
 * of a thread. Program should print randomly the name
 * of thread and value of sleep time. The name of the
 * thread should be hard coded through constructor.
 * The sleep time of a thread will be a random integer
 * in the range 0 to 4999.
 */
public class Slip12Q2 extends Thread {
    public Slip12Q2(String s) {
        super(s);
    }

    public void run() {
        System.out.println(getName() + " thread created.");
        while (true) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("THREAD NAME : "+this.getName()+"\n"+"THREAD PRIORITY : "+this.getPriority());
            int s = (int) (Math.random() * 5000);
            System.out.println(getName() + "is sleeping for : " + s + " mile sec");
            try {
                Thread.sleep(s);
            } catch (Exception ignored) {
            }
        }
    }
}
class ThreadLifeCycle{
    public static void main(String[] args) {
        Slip12Q2 t1=new Slip12Q2("Groot"),t2=new Slip12Q2("Amar");
        t1.start();
        t2.start();
        try {
            t1.join();
            t2.join();
        }
        catch(Exception ignored) {}
        System.out.println(t1.getName()+"thread dead.");
        System.out.println(t2.getName()+"thread dead.");
    }
}

Write a java program to count the number of records in a table.

 DOWNLOAD      SLIP12Q1         SQLFORIT       SQL DRIVER

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 19:54
 * Purpose of class :
 */
public class Slip12Q1 {
    public static void main(String[] args) throws Exception {
        DriverManager.registerDriver(new com.mysql.jdbc.Driver());
        String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
        Connection con = DriverManager.getConnection(mysqlUrl, "root", "");
        System.out.println("Connection established......");
        Statement stmt = con.createStatement();
        String query = "select count(*) from Cricketers_Data";
        ResultSet rs = stmt.executeQuery(query);
        rs.next();
        int count = rs.getInt(1);
        System.out.println("Number of records in the cricketers_data table: "+count);
    }
}

Write a java program in multithreading using applet for Digital watch.

 DOWNLOAD    SLIP8Q2

import java.applet.Applet;
import java.awt.*;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 19:15
 * Purpose of class :
 */
public class Slip8Q2 extends Applet implements Runnable {

    Thread t1 = null;
    int hours = 0, minutes = 0, seconds = 0;
    String time = "";
    public void init() {
        setBackground( Color.green);
    }
    public void start() {
        t1 = new Thread( this );
        t1.start();
    }

    public void run() {
        try {
            while (true) {
                Calendar cal = Calendar.getInstance();
                hours = cal.get( Calendar.HOUR_OF_DAY );
                if ( hours > 12 ) hours -= 12;
                minutes = cal.get( Calendar.MINUTE );
                seconds = cal.get( Calendar.SECOND );
                SimpleDateFormat formatter = new SimpleDateFormat("hh:mm:ss");
                Date d = cal.getTime();
                time = formatter.format( d );
                repaint();
                Thread.sleep( 1000 );
            }
        }
        catch (Exception ignored) { }
    }
    public void paint( Graphics g ) {
        g.setColor( Color.blue );
        g.setFont(new Font("",Font.PLAIN,100));
        g.drawString( time, 100, 150 );
    }
}
/*<applet code= "Slip8Q2.class" height="300" width="600"></applet>*/

Write a SERVLET program which counts how many times a user has visited a web page. If user is visiting the page for the first time, display a welcome message. If the user is revisiting the page, display the number of times visited. (Use Cookie)

 DOWNLOAD  Slip6Q2

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 18:56
 * Purpose of class : Write a SERVLET program
 * which counts how many times a user has visited a web
 * page. If user is visiting the page for the first time,
 * display a welcome message. If the
 * user is revisiting the page, display the number
 * of times visited. (Use Cookie)
 */
public class Slip6Q2 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++;
    }
}

Write a java program to blink image on the Frame continuously.

 DOWNLOAD  SLIP6Q1

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;

/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 18:36
 * Purpose of class :
 */
public class Slip6Q1 extends JComponent {
    BufferedImage image;
    boolean showImage;
    int x = -1;
    int y = -1;
    Random r;

    Slip6Q1() throws IOException {

        // put your image reading code here..

        image = new BufferedImage(32,32,BufferedImage.TYPE_INT_ARGB);
        Graphics g = image.createGraphics();
        g.setColor(Color.ORANGE);
        g.fillOval(0,0,32,32);

        r = new Random();
        ActionListener listener = new ActionListener(){
            public void actionPerformed(ActionEvent ae) {
                if (image!=null) {
                    if (!showImage) {
                        int w = image.getWidth();
                        int h = image.getHeight();
                        int rx = getWidth()-w;
                        int ry = getHeight()-h;
                        if (rx>-1 && ry>-1) {
                            x = r.nextInt(rx);
                            y = r.nextInt(ry);
                        }
                    }
                    showImage = !showImage;
                    repaint();
                }
            }
        };
        Timer timer = new Timer(600,listener);
        timer.start();
        setPreferredSize(new Dimension(150,100));
        JOptionPane.showMessageDialog(null, this);
        timer.stop();
    }

    public void paintComponent(Graphics g) {
        g.setColor(Color.BLUE);
        g.fillRect(0,0,getWidth(),getHeight());
        if (showImage && image!=null) {
            g.drawImage(image,x,y,this);
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                try {
                    new Slip6Q1();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

Write a java program in multithreading using applet for Traffic signal

 

DOWNLOAD  SIGNAL

import java.applet.Applet;
import java.awt.*;
/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 17:32
 * Purpose of class : Write a java program in multithreading
 * using applet for Traffic signal
 */
public class Signal extends Applet implements Runnable {
    int i,j;
    Thread t;
    int timeOfSignal,signalColor;

    public void init() {
        timeOfSignal=90;signalColor=0;
        t=new Thread(this);
        t.start();
    }
    public void run() {
        try{
            if (signalColor==0){
                for (j=0;j<90;j++){
                    timeOfSignal=timeOfSignal-1;
                    Thread.sleep(500);
                    repaint();
                }
                signalColor=1;
                timeOfSignal=15;
            }
            if(signalColor==1){
                for (j=0;j<15;j++){
                    timeOfSignal=timeOfSignal-1;
                    Thread.sleep(500);
                    repaint();
                }
                signalColor=2;
                timeOfSignal=90;
            }
            if(signalColor==2){
                for (j=0;j<90;j++){
                    timeOfSignal=timeOfSignal-1;
                    Thread.sleep(500);
                    repaint();
                }
                signalColor=0;
                timeOfSignal=90;
            }
            if (i==0) {
                run();
            }
        }
        catch(Exception e) {
        }
    }

    public void paint(Graphics g) {
        g.drawOval(100,100,100,100);
        g.drawOval(100,225,100,100);
        g.drawOval(100,350,100,100);
        g.setFont(new Font("",Font.PLAIN,24));
        g.drawString(String.valueOf(timeOfSignal),400,150);

        if(signalColor==0&&!(j==90)){
            g.setColor(Color.red);
            g.fillOval(100,100,100,100);
            g.drawOval(100,100,100,100);
            g.drawString("stop",400,430);
        }
        if(signalColor==1&&!(j==15)) {
            g.setColor(Color.yellow);
            g.fillOval(100, 225, 100, 100);
            g.drawOval(100, 225, 100, 100);
            g.drawString("slow", 400, 430);
        }
        if (signalColor==2&&!(j==90)) {
            g.setColor(Color.green);
            g.fillOval(100,350,100,100);
            g.drawOval(100,350,100,100);
            g.drawString("go",400,430);
        }
    }
}
/*<applet code= "Signal.class" height="600" width="600"></applet>*/