Motion Detector in Java (Using Sarxos.Webcam)

 Motion Detector in Java

This link can be used to download the library used to make this project:

import  javax.sound.sampled.*;
import java.io.File;
import java.io.IOException;

import com.github.sarxos.webcam.Webcam;
import com.github.sarxos.webcam.WebcamMotionDetector;
import com.github.sarxos.webcam.WebcamMotionEvent;
import com.github.sarxos.webcam.WebcamMotionListener;


public class DetectMotion implements WebcamMotionListener  {

    public DetectMotion() {

        WebcamMotionDetector detector = new WebcamMotionDetector(Webcam.getDefault());
        detector.setInterval(200); // one check per 500 ms
        detector.addMotionListener(this);
        detector.start();
    }

    @Override
    public void motionDetected(WebcamMotionEvent wme) {
        System.out.print("beep ");
    }

    public static void main(String[] args) {




       //Detector
        new DetectMotion();
        System.in.read(); // keep program open
    }
}

Every time a motion is detected by the webcam of your PC 'beep' will be printed.

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You can also follow this tutorial by Genuine Coder Youtube channel to build basic programs using this library.

Basic Calculator Using 'GUI' in java

Calculator Using GUI

********************************

 package com.company;

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class GUI_calculator implements ActionListener {

    float first=0;

    float second=0;

    float third=0;

   private JFrame frame;

   private JPanel panel;

    private JButton b;

   private JButton b1;

   private JButton b2;

   private JButton b3;

   private JButton b4;

    private JButton b5;

    private JButton b6;

    private JButton b7;

   private JLabel label;

    private JLabel label1;

    private JLabel label2;

    public GUI_calculator(){

        frame=new JFrame();

        label=new JLabel("0");

        b=new JButton("++");

        b1=new JButton("+");

        b2=new JButton("-");

        b3=new JButton("*");

        b4=new JButton("/");

        label1=new JLabel("0");

        b5=new JButton("++");

        b6=new JButton("=");

        b7=new JButton("C");

        label2=new JLabel("0");

        b1.addActionListener(this);

        b2.addActionListener(this);

        b3.addActionListener(this);

        b4.addActionListener(this);

        b.addActionListener(this);

        b5.addActionListener(this);

        b6.addActionListener(this);

        b7.addActionListener(this);

        //Panel Content

        panel=new JPanel();

        panel.setBorder(BorderFactory.createEmptyBorder(30,30,10,30));

        panel.add(label);

        panel.add(b);

        panel.add(label1);

        panel.add(b5);

        panel.add(b7);

        panel.add(b1);

        panel.add(b2);

        panel.add(b3);

        panel.add(b4);

        panel.add(b6);

        panel.add(label2);

        panel.setLayout(new GridLayout(0,1));

        frame.add(panel,BorderLayout.CENTER);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setTitle("Calculator");

        frame.pack();

        frame.setVisible(true);

    }

    public static void main(String[] args) {

        new GUI_calculator();

    }

    @Override

    public void actionPerformed(ActionEvent e) {

if (e.getSource()==b){

    first++;

    label.setText(""+first);

}

else { }

if (e.getSource()==b5){

    second++;

    label1.setText(""+second);

}

else { }

if (e.getSource()==b1){

    third=first+second;

}

else if (e.getSource()==b2){

    third=first-second;

}

else if (e.getSource()==b3){

    third=first*second;

}

else if (e.getSource()==b4){

    third=first/second;

}

else if (e.getSource()==b7){

    first=0;

    second=0;

    label1.setText(""+second);

    label.setText(""+first);

}

if (e.getSource()==b6){

    label2.setText(""+third);

}

    }

}

Library Management System in Java

 Library Management System

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

class Library{
    Scanner sc=new Scanner(System.in);
    List<String> Books=new ArrayList<String>();
    List<String> IssuedBooks=new ArrayList<String>();

    public void addBook(){
        System.out.print("Enter the name of the book to be added: ");
        Books.add(sc.nextLine());
    }
    
    public void showAvailableBooks(){
        if (Books.size()==0){
            System.out.println("No books in the library");
        }
        else {
            System.out.println("Here is a list of books available in our library: ");
            for (int a = 1; a <= Books.size(); a++) {
                System.out.println(a + " " + Books.get(a - 1));
            }
        }
    }

    public void issueBook(){
        System.out.print("Enter the serial no. of the book you want to issue: ");
        int b=sc.nextInt();
        IssuedBooks.add(Books.get(b-1));
        System.out.println("You have issued: "+Books.get(b-1));
        Books.remove(b-1);
    }

    public void showIssuedBooks(){
        if (IssuedBooks.size()==0){
            System.out.println("No books issued!");
        }
        else {
            System.out.println("Here is a list of books issued: ");
            for (int a=1;a<=IssuedBooks.size();a++){
                System.out.println(a+" "+IssuedBooks.get(a-1));
            }
        }

    }

    public void returnBook(){
        System.out.print("Enter the serial no. of the book to be returned from the issued books: ");
        int b= sc.nextInt();
        Books.add(IssuedBooks.get(b-1));
        System.out.println("You have returned: "+IssuedBooks.get(b-1));
        IssuedBooks.remove(b-1);
    }

}
public class online_library {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        //Implement a library using java class library
        //Method: addBook, issueBook, returnBook, showAvailableBooks,showIssuedBooks,
        //Properties: Array to store the available books, Array to store the issued books
        Library jnrm=new Library();
        int a=0;
        System.out.println("Add book to library->add\nShow available books->showl\nIssue book->issue\nShow issued books->showi\nReturn book->return");
    while (a==0){

        String b= sc.next();
        if (b.equals("add")){
            jnrm.addBook();
        }
        else if (b.equals("showl")){
            jnrm.showAvailableBooks();
        }
        else if (b.equals("issue")){
            jnrm.issueBook();
        }
        else if (b.equals("showi")){
            jnrm.showIssuedBooks();
        }
        else if (b.equals("return")){
            jnrm.returnBook();
        }
        else {
            System.out.println("Something went wrong\nCheck the syntax!!!");
        }
    }
    }
}