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Top Java Projects you need to know in 2019

Published on Sep 30,2019 38 Views
Ravi Kiran
Tech Enthusiast working as a Research Analyst at Edureka. Curious about learning... Tech Enthusiast working as a Research Analyst at Edureka. Curious about learning more about Data Science and Big-Data Hadoop.

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myMock Interview Service for Real Tech Jobs

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myMock Interview Service for Real Tech Jobs

  • Mock interview in latest tech domains i.e JAVA, AI, DEVOPS,etc
  • Get interviewed by leading tech experts
  • Real time assessment report and video recording

The demand for Java is never-ending and many top MNCs are looking for Java Developers. These days, having hands-on experience in java and trying out projects in java would be an added weight to your resume. In this article, we shall try out the top 5 projects that you need to know in 2019.

 

Online Examination

This particular project is designed to provide a user interface that asks multiple-choice questions and takes inputs from users as the answers and then, finally evaluates all the questions and gives back the output as the individuals result.

 

package Edureka;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class OnlineTest extends JFrame implements ActionListener {
       JLabel l;
       JRadioButton jb[] = new JRadioButton[5];
       JButton b1, b2;
       ButtonGroup bg;
       int count = 0, current = 0, x = 1, y = 1, now = 0;
       int m[] = new int[10];

       OnlineTest(String s) {
              super(s);
              l = new JLabel();
              add(l);
              bg = new ButtonGroup();
              for (int i = 0; i < 5; i++) {
              jb[i] = new JRadioButton();
              add(jb[i]);
              bg.add(jb[i]);
        }
        b1 = new JButton("Next");
        b2 = new JButton("Bookmark");
        b1.addActionListener(this);
        b2.addActionListener(this);
        add(b1);
        add(b2);
        set();
        l.setBounds(30, 40, 450, 20);
        jb[0].setBounds(50, 80, 100, 20);
        jb[1].setBounds(50, 110, 100, 20);
        jb[2].setBounds(50, 140, 100, 20);
        jb[3].setBounds(50, 170, 100, 20);
        b1.setBounds(100, 240, 100, 30);
        b2.setBounds(270, 240, 100, 30);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(null);
        setLocation(250, 100);
        setVisible(true);
        setSize(600, 350);
}

public void actionPerformed(ActionEvent e) {
        if (e.getSource() == b1) {
              if (check())
                    count = count + 1;
                    current++;
                    set();
              if (current == 9) {
                    b1.setEnabled(false);
                    b2.setText("Result");
              }
        }
        if (e.getActionCommand().equals("Bookmark")) {
              JButton bk = new JButton("Bookmark" + x);
              bk.setBounds(480, 20 + 30 * x, 100, 30);
              add(bk);
              bk.addActionListener(this);
              m[x] = current;
              x++;
              current++;
              set();
              if (current == 9)
                    b2.setText("Result");
                    setVisible(false);
                    setVisible(true);
              }
              for (int i = 0, y = 1; i < x; i++, y++) {
                    if (e.getActionCommand().equals("Bookmark" + y)) {
                          if (check())
                          count = count + 1;
                          now = current;
                          current = m[y];
                          set();
                          ((JButton) e.getSource()).setEnabled(false);
                          current = now;
                    }
              }

              if (e.getActionCommand().equals("Result")) {
                     if (check())
                     count = count + 1;
                     current++;
                     JOptionPane.showMessageDialog(this, "correct ans=" + count);
                     System.exit(0);
              }
        }
        void set() {
                 jb[4].setSelected(true);
                 if (current == 0) {
                     l.setText("Que1: Which one among these is not a primitive datatype?");
                     jb[0].setText("int");
                     jb[1].setText("Float");
                     jb[2].setText("boolean");
                     jb[3].setText("char");
                 }
                 if (current == 1) {
                     l.setText("Que2: Which class is available to all the class automatically?");
                     jb[0].setText("Swing");
                     jb[1].setText("Applet");
                     jb[2].setText("Object");
                     jb[3].setText("ActionEvent");
                 }
                 if (current == 2) {
                     l.setText("Que3: Which package is directly available to our class without importing it?");
                     jb[0].setText("swing");
                     jb[1].setText("applet");
                     jb[2].setText("net");
                     jb[3].setText("lang");
                 }
                 if (current == 3) {
                     l.setText("Que4: String class is defined in which package?");
                     jb[0].setText("lang");
                     jb[1].setText("Swing");
                     jb[2].setText("Applet");
                     jb[3].setText("awt");
                 }
                 if (current == 4) {
                     l.setText("Que5: Which institute is best for java coaching?");
                     jb[0].setText("Utek");
                     jb[1].setText("Aptech");
                     jb[2].setText("SSS IT");
                     jb[3].setText("jtek");
                 }
                 if (current == 5) {
                     l.setText("Que6: Which one among these is not a keyword?");
                     jb[0].setText("class");
                     jb[1].setText("int");
                     jb[2].setText("get");
                     jb[3].setText("if");
                 }
                 if (current == 6) {
                     l.setText("Que7: Which one among these is not a class? ");
                     jb[0].setText("Swing");
                     jb[1].setText("Actionperformed");
                     jb[2].setText("ActionEvent");
                     jb[3].setText("Button");
                 }
                 if (current == 7) {
                     l.setText("Que8: which one among these is not a function of Object class?");
                     jb[0].setText("toString");
                     jb[1].setText("finalize");
                     jb[2].setText("equals");
                     jb[3].setText("getDocumentBase");
                 }
                 if (current == 8) {
                     l.setText("Que9: which function is not present in Applet class?");
                     jb[0].setText("init");
                     jb[1].setText("main");
                     jb[2].setText("start");
                     jb[3].setText("destroy");
                 }
                 if (current == 9) {
                     l.setText("Que10: Which one among these is not a valid component?");
                     jb[0].setText("JButton");
                     jb[1].setText("JList");
                     jb[2].setText("JButtonGroup");
                     jb[3].setText("JTextArea");
                 }
                 l.setBounds(30, 40, 450, 20);
                 for (int i = 0, j = 0; i <= 90; i += 30, j++)
                 jb[j].setBounds(50, 80 + i, 200, 20);
         }

        boolean check() {
              if (current == 0)
                      return (jb[1].isSelected());
              if (current == 1)
                      return (jb[2].isSelected());
              if (current == 2)
                      return (jb[3].isSelected());
              if (current == 3)
                      return (jb[0].isSelected());
              if (current == 4)
                      return (jb[2].isSelected());
              if (current == 5)
                      return (jb[2].isSelected());
              if (current == 6)
                      return (jb[1].isSelected());
              if (current == 7)
                      return (jb[3].isSelected());
              if (current == 8)
                      return (jb[1].isSelected());
              if (current == 9)
                      return (jb[2].isSelected());
              return false;
         }

         public static void main(String s[]) {
                new OnlineTest("Online Test Of Java");
       }
}

//Output

online-test-Java-Projects-Edureka

 

//Final Output after answering all questions

 

online-test-Java-Projects-Edureka

The next project is the Group Conversation.

 

Group Conversation

This project is designed to provide a group conversation amongst multiple terminals. the code for the same is as follows. the users must take care of the port numbers and IP address. The code for the same is as follows.

 

package groupchat;

import java.net.*;
import java.io.*;
import java.util.*;

public class GroupConversation {
        private static final String TERMINATE = "Exit";
        static String name;
        static volatile boolean finished = false;
        public static void main(String[] args) {
               if (args.length != 2)
                       System.out.println("Two arguments required: <multicast-host> <port-number>");
               else {
                       try {
                             InetAddress group = InetAddress.getByName(args[0]);
                             int port = Integer.parseInt(args[1]);
                             Scanner sc = new Scanner(System.in);
                             System.out.print("Enter your name: ");
                             name = sc.nextLine();
                             MulticastSocket socket = new MulticastSocket(port);
                             socket.setTimeToLive(0);
                             socket.joinGroup(group);
                             Thread t = new Thread(new ReadThread(socket, group, port));
                             t.start();
                             System.out.println("Start typing messages...n");
                             while (true) {
                                    String message;
                                    message = sc.nextLine();
                                    if (message.equalsIgnoreCase(GroupConversation.TERMINATE)) {
                                          finished = true;
                                          socket.leaveGroup(group);
                                          socket.close();
                                          break;
                                    }
                                    message = name + ": " + message;
                                    byte[] buffer = message.getBytes();
                                    DatagramPacket datagram = new DatagramPacket(buffer, buffer.length, group, port);
                                    socket.send(datagram);
                             }
                       } 
                       catch (SocketException se) {
                             System.out.println("Error creating socket");
                             se.printStackTrace();
                       } 
                       catch (IOException ie) {
                             System.out.println("Error reading/writing from/to socket");
                             ie.printStackTrace();
                       }
               }
        }
}

class ReadThread implements Runnable {
         private MulticastSocket socket;
         private InetAddress group;
         private int port;
         private static final int MAX_LEN = 1000;
         ReadThread(MulticastSocket socket, InetAddress group, int port) {
                this.socket = socket;
                this.group = group;
                this.port = port;
         }
         @Override
          public void run() {
                while (!GroupConversation.finished) {
                        byte[] buffer = new byte[ReadThread.MAX_LEN]; 
                        DatagramPacket datagram = new DatagramPacket(buffer, buffer.length, group, port);
                        String message;
                try {
                        socket.receive(datagram);
                        message = new String(buffer, 0, datagram.getLength(), "UTF-8");
                        if (!message.startsWith(GroupConversation.name))
                                System.out.println(message);
                        } 
                        catch (IOException e) {
                                System.out.println("Socket closed!");
                        }
                 }
          }
}

//Output

group-conversation-Java-Projects-edureka

 

The next project is the OTP Generator

 

OTP Generator

This project is designed to generate OTP in the realtime using the random function. the code for the same is as follows.

 

package otp;
import java.util.*;

public class Edureka {
       static char[] OTP(int len) {
             System.out.println("Generating OTP using random() : ");
             System.out.print("You OTP is : ");
             String numbers = "0123456789";
             Random rndm_method = new Random();
             char[] otp = new char[len];
             for (int i = 0; i < len; i++) {
                    otp[i] = numbers.charAt(rndm_method.nextInt(numbers.length()));
             }
             return otp;
       }
       public static void main(String[] args) {
             int length = 4;
             System.out.println(OTP(length));
       }
}

//Output

Generating OTP using random() :
You OTP is : 7892

The next project is the Password Generator

 

Password Generator

This project is designed to generate Password in the realtime using the random function. the code for the same is as follows.

 

package OTP_Generator;

import java.util.*;
public class Edureka {
     public static void main(String[] args) {
          int length = 10;
          System.out.println(geek_Password(length));
     }
     static char[] geek_Password(int len) {
          System.out.println("Generating password using random() : ");
          System.out.print("Your new password is : ");
          String Capital_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
          String Small_chars = "abcdefghijklmnopqrstuvwxyz";
          String numbers = "0123456789";
          String symbols = "!@#$%^&*_=+-/.?<>)";
          String values = Capital_chars + Small_chars + numbers + symbols;
          Random rndm_method = new Random();
          char[] password = new char[len];
          for (int i = 0; i < len; i++) {
                password[i] = values.charAt(rndm_method.nextInt(values.length()));
          }
          return password;
     }
}

//Output

Generating password using random() :
Your new password is : /vZr_QsZNm

 

With this, we come to an end of this Java Projects Tutorial. I hope you have understood these Java Projects and their implementation.

Now that you have understood the basics through this “Java Projects” tutorial check out the Java training by Edureka, a trusted online learning company with a network of more than 250,000 satisfied learners spread across the globe. Edureka’s Java J2EE and SOA training and certification courses are designed for students and professionals who want to be a Java Developer. The course is designed to give you a head start into Java programming and train you for both core and advanced Java concepts along with various Java frameworks like Hibernate & Spring.

Got a question for us? Mention it in the comments section of this “Java Projects” blog and we will get back to you as soon as possible.

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