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>*/

Write a java program using applet for bouncing ball, for each bounce color of ball should change randomly.

 DOWNLOAD            Slip3Q2

/**
 * Step to run the file
 * 1. save this file as     "Slip3Q2.java"
 * 2. compile the file      javac Slip3Q2.java
 * 3. run the file          java Slip3Q2
 */

import java.applet.Applet;
import java.awt.*;
import java.util.Random;

public class Slip3Q2 extends Applet implements Runnable {
    Thread t;
    int moveSide, yAxis;
    boolean sideChanged=false;
    private int rCode=0,gCode=0,bCode=0;

    public void init(){
        t=new Thread(this);
        t.start();
        moveSide=0;  yAxis=0;
    }
    public void run() {
        try{
            if (moveSide==0){
                Thread.sleep(10);
                yAxis=yAxis+5;
                repaint();
            }
            if(moveSide==1) {
                Thread.sleep(10);
                yAxis=yAxis-5;
                repaint();
            }
        }catch(Exception ignored){ }
        run();
    }
    public void paint(Graphics g) {
        if(moveSide==0) {
            g.setColor(new Color(rCode,gCode,bCode));
            g.fillOval(150,yAxis+10,20,20);
            if(yAxis==400) {
                Random random = new Random();
                rCode = random.nextInt(256);
                gCode = random.nextInt(256);
                bCode = random.nextInt(256);
                moveSide=1;
            }
        }if(moveSide==1) {
            g.setColor(new Color(rCode,gCode,bCode));
            g.fillOval(150,yAxis-10,20,20);
            if(yAxis==0) {
                Random random = new Random();
                rCode = random.nextInt(256);
                gCode = random.nextInt(256);
                bCode = random.nextInt(256);
                moveSide=0;
            }
        }
    }
}
/*<applet code="Slip3Q2.class" height=400 width=350></applet>*/

Write a socket program in Java to check whether given number is prime or not. Display result on client terminal

DOWNLOAD        PrimeServer         PrimeClient

 /**

 * STEPS TO RUN THE CODE
 * 1. COMPILE SERVER AND CLIENT
 * 2. FIRST RUN SERVER FILE
 * 3. SECOND RUN CLIENT FILE
 * 4. GIVE A NUMBER FROM CLIENT CMD
 */

/**
 * SAVE AS PrimeServer.java
 */

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * Created by : Amar Ghugare
 * created on : 20-05-2022 18:35
 * Purpose of class : server to attend client request
 */
public class PrimeServer {
    public static void main(String args[])throws Exception {
        ServerSocket ss=new ServerSocket(3333);
        Socket s=ss.accept();
        DataInputStream din=new DataInputStream(s.getInputStream());
        DataOutputStream dout=new DataOutputStream(s.getOutputStream());
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        System.out.println("server here..");
        String str="",str2="";
        str=din.readUTF();
        int n=Integer.parseInt(str);
        System.out.println("given no is: "+n);
        int i,m=0,flag=0;
        m=n/2;
        if(n==0||n==1){
            dout.writeUTF(n+" is not prime number");
            System.out.println(n+" is not prime number");
        }else{
            for(i=2;i<=m;i++){
                if(n%i==0){
                    dout.writeUTF(n+" is not prime number");
                    System.out.println(n+" is not prime number");
                    flag=1;
                    break;
                }
            }
            dout.writeUTF(n+" is prime number");
            if(flag==0)  { System.out.println(n+" is prime number"); }
        }//end of else
        dout.flush();
        din.close();
        s.close();
        ss.close();
    }
}

/**
 * SAVE AS PrimeClient.java
 */

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.Socket;

/**
 * Created by : Amar Ghugare
 * created on : 20-05-2022 18:34
 * Purpose of class : to give a number to server
 */
public class PrimeClient {
    public static void main(String args[]) throws Exception {
        Socket s = new Socket("localhost", 3333);
        DataInputStream din = new DataInputStream(s.getInputStream());
        DataOutputStream dout = new DataOutputStream(s.getOutputStream());
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("enter any number");
        String str = "", str2 = "";
        str = br.readLine();
        dout.writeUTF(str);
        dout.flush();
        str2 = din.readUTF();
        System.out.println(str2);
        dout.close();
        s.close();
    }
}

Write a socket program in java for chatting application.(Use Swing)

 

DOWNLOAD   ServerChatForm     ClientChatForm

// Step 1 SAVE THIS FILE AS ServerChatForm.java

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 * Created by : Amar Ghugare
 * created on : 20-05-2022 17:32
 * Purpose of class : to create a server of chat
 */
public class ServerChatForm extends JFrame implements ActionListener {

    static ServerSocket server;
    static Socket conn;
    JPanel panel;
    JTextField NewMsg;
    JTextArea ChatHistory;
    JButton Send;
    DataInputStream dis;
    DataOutputStream dos;
    public ServerChatForm()throws UnknownHostException, IOException{
        this.setSize(500, 500);
        this.setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setTitle("Server");

        panel = new JPanel();
        panel.setLayout(null);
        this.add(panel);

        NewMsg = new JTextField();
        NewMsg.setBounds(20, 400, 340, 30);
        panel.add(NewMsg);

        ChatHistory = new JTextArea();
        ChatHistory.setText("Waiting for Client");
        ChatHistory.setBounds(20, 20, 450, 360);
        panel.add(ChatHistory);

        Send = new JButton("Send");
        Send.setBounds(375, 400, 95, 30);
        Send.addActionListener(this);
        panel.add(Send);


        server = new ServerSocket(2000, 1, InetAddress.getLocalHost());
        conn = server.accept();
        ChatHistory.setText(ChatHistory.getText() + '\n' + "Client Found");

        while (true) {
            try {
                DataInputStream dis = new DataInputStream(conn.getInputStream());
                String string = dis.readUTF();
                ChatHistory.setText(ChatHistory.getText() + '\n'+ "Client:"+string);
            } catch (Exception e1) {
                ChatHistory.setText(ChatHistory.getText() + '\n'+ "Message sending fail:Network Error");
                try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        if ((e.getSource() == Send) && (NewMsg.getText() != "")) {
            ChatHistory.setText(ChatHistory.getText() + '\n' + "ME:"+ NewMsg.getText());
            try {
                DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
                dos.writeUTF(NewMsg.getText());
            } catch (Exception e1) {
                try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e2) {
                    e2.printStackTrace();
                }
            }
            NewMsg.setText("");
        }
    }

    public static void main(String[] args)throws UnknownHostException,IOException {
        new ServerChatForm();
    }
}

// STEP 2 SAVE THIS FILE AS ClientChatForm.java

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 * Created by : Amar Ghugare
 * created on : 20-05-2022 17:44
 * Purpose of class : to make a client for chat
 */
public class ClientChatForm extends JFrame implements ActionListener {
    static Socket conn;
    JPanel panel;
    JTextField NewMsg;
    JTextArea ChatHistory;
    JButton Send;

    public ClientChatForm()throws UnknownHostException, IOException{
        this.setSize(500, 500);
        this.setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        panel = new JPanel();
        panel.setLayout(null);
        this.add(panel);

        NewMsg = new JTextField();
        NewMsg.setBounds(20, 400, 340, 30);
        panel.add(NewMsg);

        ChatHistory = new JTextArea();
        ChatHistory.setBounds(20, 20, 450, 360);
        panel.add(ChatHistory);

        Send = new JButton("Send");
        Send.setBounds(375, 400, 95, 30);
        Send.addActionListener(this);
        panel.add(Send);


        conn = new Socket(InetAddress.getLocalHost(), 2000);

/** for remote pc use ip address of server with function* InetAddress.getByName("Provide ip here")* ChatHistory.setText("Connected to Server");*/
        ChatHistory.setText("Connected to Server");
        this.setTitle("Client");
        while (true) {
            try {
                DataInputStream dis = new DataInputStream(conn.getInputStream());
                String string = dis.readUTF();
                ChatHistory.setText(ChatHistory.getText() + '\n'+ "Server:"+ string);
            } catch (Exception e1) {
                ChatHistory.setText(ChatHistory.getText() + '\n'+ "Message sending fail:Network Error");
                try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        if ((e.getSource() == Send) && (NewMsg.getText() != "")) {
            ChatHistory.setText(ChatHistory.getText() + '\n' + "Me:"+ NewMsg.getText());
            try {
                DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
                dos.writeUTF(NewMsg.getText());
            } catch (Exception e1) {
                ChatHistory.setText(ChatHistory.getText() + '\n' + "Message sending fail:Network Error");
                try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e2) {
                    e2.printStackTrace();
                }
            }
            NewMsg.setText("");
        }
    }

    public static void main(String[] args)throws UnknownHostException,IOException {
        new ClientChatForm();
    }
}

// STEP 3 COMPILE BOTH FILES 
// STEP 4 RUN SERVER CHAT FIRST THEN RUN CLIENT CHAT

Write a java program to scroll the text from left to right and vice versa continuously.

DOWNLOAD SLIP1Q1

 SAVE CODE AS     "Slip1Q1"

TO RUN    appletviewer Slip1Q1.java

import java.applet.Applet;
import java.awt.*;

/**
 * Created by : Amar Ghugare
 * created on : 20-05-2022 16:02
 * Purpose of class :
 * Write a java program to scroll the text from 
 * left to right and vice versa continuously.
 */

public class Slip1Q1 extends Applet implements Runnable{
    String banner="Hello I am Groot";
    Thread t = null;
    int x;
    public void paint(Graphics g) {
        Font a = new Font("Impact",Font.BOLD,14);
        g.setFont(a);
        g.drawString(banner, x, 100);
    }
    public void start() {
        t = new Thread( this );
        t.start();
    }

    public void init(){
        setBackground(Color.black);
        setForeground(Color.green);
    }
    @Override
    public void run() {
        try {
            for(int i =0;i<400;i++){
                repaint(10);
                x=i;
                Thread.sleep( 100);
            }
        }catch (Exception ignored){}
    }
}
/**
 * <applet code="Slip1Q1.class" width="600" height="300">
 * </applet>
 */