So I am making a responsive audio waveform, if you don't know what that is, it is something like this: (btw this is my goal to make those audio waveforms). https://i.ytimg.com/vi/J7uN-SQtOYI/maxresdefault.jpg https://www.youtube.com/watch?v=OVMuwa-HRCQ https://www.youtube.com/watch?v=SCD2tB1qILc I don't know how to describe it, so just look at the videos and image. but my question is, how do I get the values from the "AudioSpectrumListener", it has a lambda expression. And I need the value of the magnitude. So I can print out the values. Later I will use the values to make rectangles and that rectangles will change height shape because of the …

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Hii Guys I am currently Devloping a Java Remote Desktop Software like teamviewer I would like know some guidelines about the tools I can use for client and server side I could create a GUI using Swing and add by using Robot class to imitate mouseactions and keyactions and by using screen capture and Compression and TCP/socket programming I could send the images Is it the best efficient way to acheive this ?Are there any other latest tools/protocols which are faster ? By googling a lot I found RDP and VNC a lot of times ?What are they

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Hi guys, I wonder if this is something I could do on this forum. I've never worked with REST, so I thought that it could be a good exercise to try to develop a very small and simple Java application and try to make use of REST as well. I found a brief which seems simple enough, I'll share it with you (I'm happy to change this of course if you think it's useful as for me it's just practice). As a Rest Client I want to submit new orders for bricks So I can start customers’ orders Given A …

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Hi developers! I have made a POS software. I have added the functionality of "priniting to Thermal printer" and "barcodes". Firstly I added the functionality of Reciept printing which worked perfectly. Then I added the functionality of barcode scanning. As you know barcode reader device automatically scans the barcode and write the barcode in Text field or excel sheet. But in the sales screen , all the field of item/product should be populated from database When barcode is scanned. I implemented an interface(I get this code form internet) in the my Sales Screen Constructor. It workded perfectly for me, but …

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Hi developers! I have made a POS software. I have added the functionality of "priniting to Thermal printer" and "barcodes". Firstly I added the functionality of Reciept printing which worked perfectly. Then I added the functionality of barcode scanning. As you know barcode reader device automatically scans the barcode and write the barcode in Text field or excel sheet. But in the sales screen , all the field of item/product should be populated from database When barcode is scanned. I implemented an interface(I get this code form internet) in the my Sales Screen Constructor. It workded perfectly for me, but …

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So, I made a simple server-client chat program, but I have a problem: if the server tries to message the client, the server lags or freezes a bit, same with the client. is there something that I do wrong? import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.TextArea; import javafx.scene.control.TextField; import javafx.scene.paint.Color; import javafx.stage.Stage; public class Server extends Application { private Group serverGR; private Scene serverSC; private Stage window; private TextField tf; private TextArea ta; private ServerSocket ss; private Socket s; private DataInputStream dis; private DataOutputStream dos; ConnectionThread cT = new …

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I am making a program, and I don't know why my program becomes unresponsive, when I click the button ): I have a feeling its because of this: "connection = server.accept();" I don't know how to fix it. I am trying to recreate this: https://stackoverflow.com/questions/18505123/how-to-use-client-chat-on-different-pc but in javafx. package yeetYeet; import java.io.EOFException; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.net.ServerSocket; import java.net.Socket; import javafx.animation.AnimationTimer; import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.TextArea; import javafx.scene.control.TextField; import javafx.scene.paint.Color; import javafx.stage.Stage; public class Server extends Application{ private ObjectOutputStream output; private ObjectInputStream input; private ServerSocket server; private Socket connection; //set up and …

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When we build an application, which layer should we start with? From top (UI) to bottom(Data Layer) or bottom to top?

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[B]I've highlighted the code in question in red. Can somebody tell me how the red code makes Pac man and the Ghosts move?[/B] [code]// // PacMan // Another 1 day game (created in 5 hours). // // (C)2000 // Brian Postma // [email]b.postma@hetnet.nl[/email] // [url]http://www.homepages.hetnet.nl/~brianpostma[/url] // import java.awt.*; import java.applet.Applet; public class PacMan extends Applet implements Runnable { Dimension d; Font largefont = new Font("Helvetica", Font.BOLD, 24); Font smallfont = new Font("Helvetica", Font.BOLD, 14); FontMetrics fmsmall, fmlarge; Graphics goff; Image ii; Thread thethread; MediaTracker thetracker = null; Color dotcolor=new Color(192,192,0); int bigdotcolor=192; int dbigdotcolor=-2; Color mazecolor; boolean ingame=false; boolean showtitle=true; …

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H! I am writing a java proram in which I need to generate and read barcodes to and from .PNG images. I used barcode4j-2.jar library to generate barcodes and write them to PNG image. I did this successfully. But I faced an error during reading that generated barcode from the image. I used "OnBarcode.BarcodeReader.jar" library to read the barcode but it give s me folloiwng error: java.lang.NoClassDefFoundError: com/sun/media/jai/codec/SeekableStream at a.a.b.a.a(a.java) at a.a.d.a(d.java) at a.a.d.a(d.java) at a.a.d.b(d.java) at a.a.d.a(d.java) at a.a.d.e(d.java) at a.a.d.c(d.java) at a.a.d.a(d.java) at a.a.d.a(d.java) at OnBarcode.Barcode.BarcodeScanner.BarcodeScanner.Scan(BarcodeScanner.java) I am pasting the code here: public void ReadBarcodeFromImage() throws FileNotFoundException,IOException // …

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Hi guys, as part of an exercise I was involved with, I had to use the factory pattern to create a series of different objects, however I'd like to keep a list or map for what it matters of these objects and I'm getting a bit into troubles here. So basically, I have a CSV file containing some data which I'd like to use to construct my objects: the data in the spreadsheet is arranged in the following cols: name, surname, date_of_birth, type and I'm essentially reading from the spreadsheet and using the factory pattern I'm building a series of …

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i have define code File selectedFile = new File(selectedFilePath); when run and test is it file or not if (!selectedFile.isFile()){ runOnUiThread(new Runnable() { @Override public void run() { tvFileName.setText("Source File Doesn't Exist: " + selectedFilePath); } }); return 0; it give message source file does't exist; why give this message, i have allready convert full code public int uploadFile(final String selectedFilePath) { int serverResponseCode = 0; String file_name = selectedFilePath; HttpURLConnection connection; DataOutputStream dataOutputStream; String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; int bytesRead,bytesAvailable,bufferSize; byte[] buffer; int maxBufferSize = 1 * 1024 * 1024; File selectedFile …

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hello everybody who can help with this task Now I will talk little about monoalpahapit cipher This is cipher is based on substitution the characters with another characters So in the encrypt.java file it counts how many the characters appeared in the cipher text , so in the picture that I sent to you it contains the statistics of most frequently characters, an example : suppose in the cipher text the character ( O ) appeared 16 times and it’s the most frequently character so you will back to the picture of the statistics and see what is the most …

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Hello. As a personal project, I am trying to create a "Java Argot" translator. However I am having some issues. The purpose of the program is to translate a sentece into the following "Secret Languages": "Pig Latin", "Leet" and "Morse Code". I have only done the "Pig Latin" translator however, everytime I try to activate case one in the "switch case" I get the error message "Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 0". The program shows that the line of code that is sending this message is these two lines: "`PigLatin_Translator.main(word);`" in the "Translator Menu" and …

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Hi guys, I was trying to sort an arrayList using a comparator but I didn't have much luck, or at least it seems like there is something slightly wrong with it. I have these objects in the arrayList employeeCollection.add(new Employee("Dan", 112)); employeeCollection.add(new Employee("Tim", 2)); employeeCollection.add(new Employee("Rick", 11)); employeeCollection.add(new Employee("Jack", 19)); employeeCollection.add(new Employee("Sid", 1)); and before sorting I have this Name: Dan: ID number: 112: Name: Tim: ID number: 2: Name: Rick: ID number: 11: Name: Jack: ID number: 19: Name: Sid: ID number: 1: and after sorting I have this: Name: Dan: ID number: 112: Name: Jack: ID number: 19: …

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When posting code, I get error > begin a line with 4 spaces in a row (or one tab), preceded by a blank line. 4+ spaces or tabs may not be used anywhere else.

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Halli Hallo i hope im at the right Place. I want to get started with API-Gateway(s). Currently im running 5 Microservices written in Java (Spring-Boot) deployed via Docker. Each Microservices is protected via Keycloak. I want to use a API-Gateway so that i can combine every MS into 1 Link: * demo.com/api/ms1 * demo.com/api/ms2 * ... And more important i want to have the Authorization at one Place and not in everysingle Microservice. I found a couple of Solutions but im not sure which to use or if i maybe should write my own one? I was intrested in checking …

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I am making an adroid application. I am saving sales data on firebase with current date. I have formatted the System.currentTimeMillis() into SimpleDateFormat. The date is successfully stored on firebase . Now I want to retrieve sales between two dates. I made two demo sales, one on (30-5-2019) and second on (31-5-2019). For retrieving the sales data I have just put two above mentioned static dates in my Query and ran it . The problem is that it only gives me one sale record between two dates. It should give me 2 sale records. Below is my source code. // …

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currently working on a project for college. when searching coffee names from the array list , it will show the object but will also show "there is no coffee in the list" for every time the object doesn't match the search, how can I sort this out? public static void search () { boolean arrayName = false; if (numberOfCoffees > 0) { System.out.println ("search coffee"); System.out.println ("what are you searching for?"); String search = sc.nextLine(); for (int i = 0; i < numberOfCoffees; i++) { arrayName = coffee[i][0].equals (search); if (arrayName == true) { System.out.println("coffee found: " + coffee[i][0] + …

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hi! I'm currently studying and having difficulty being able to print the array list, im not sure where im going wrong. any help will be appreciated import java.util.*; public class practice { static Scanner sc = new Scanner (System.in); static int numberOfCoffees = 0; static String[][] coffee = new String [50][2]; public static void main (String [] args) { int choice = 0; while (choice != 4) { menu (); choice = Integer.parseInt (sc.nextLine() ); if (choice == 1) { System.out.print('\u000C'); addItem(); } else if(choice == 2) { System.out.print('\u000C'); search(); } else if(choice == 3) { System.out.print('\u000C'); show(); } } …

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I have performed some query operations in nodeJS with mySQL and now I want to have a reactJS form to be embedded with it to display the results on web page. Can anyone give an idea how can I achieve the same? var mysql = require('mysql'); var con = mysql.createConnection({ host: "localhost", user: "root", password: "", port: '3307' }); con.connect(function(err) { if (err) throw err; console.log("Connected to mySQL"); con.query("CREATE DATABASE testNodeDB", function(err, result) { if (err) throw err; console.log("Database created by Jawad.."); }) }); con.connect(function(err){ if (err) throw err; console.log("Database connected finally.."); var sql = "CREATE TABLE customers_primary_key (id INT …

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So im just starting learrning code, and I am also using code.org as a starter tool. I'm on a lesson where it says to; write a program that simulates the rolling of two dice. Keep rolling the dice UNTIL the sum of the dice is either a 7 OR an 11. And I am having very much trouble for figuring out how to do that. Again, I am very new to coding.

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Are there any differencies between these two code ? if (!a.equals("")) { editDate.setText(a) } and if (a!="") { editDate.setText(a) }

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public class BusPayment extends JFrame{ private JButton paynow; private JButton cancel; private JComboBox<String> jComboBox1; private JFrame frame; private JLabel label1, label2, label3, label4; private JPanel panel1, panel2,panel3; private JRadioButton destination1; private JRadioButton destination2; private JRadioButton destination3; private JRadioButton destination4; private JRadioButton destination5; private JRadioButton destination6; private JComboBox company; private JTextField passengerstextfield; public BusPayment (){ frame.setTitle("Express Bus Ticketing Management System"); frame.setSize(1400,700); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); buildPanel(); panel1.add(label1); panel2.add(label2); panel2.add(passengerstextfield); panel2.add(label3); panel2.add(company); panel3.add(destination1); panel3.add(destination2); panel3.add(destination3); panel3.add(destination4); panel3.add(destination5); panel3.add(destination6); panel3.add(paynow); panel3.add(cancel); } private void buildPanel(){ panel1 =new JPanel(); label1=new JLabel("Welcome to the Express Bus Ticketing System! "); panel2=new JPanel(); label2=new JLabel("Number of Passenger(s): "); passengerstextfield=new …

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First: Design a class named Employee with private fields for that person’s: (1) name, (2) ID number, and (3) hire date. The ID number should be in the format ###–C, where # is a digit, 0–9, and C is a character, an uppercase letter, A–M. Write no-arg, 1-arg (name), 2-arg (name & ID), and 3-arg constructors; and a public mutator and accessor method for each of the 3 fields. Test & demonstrate Employee works. Next: Design a class named ProductionWorker which extends the Employee class. ProductionWorker class should have 2 additional private fields: (1) Shift (an integer, 1, 2 or …

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Getting errors and having a hard time seeing where. If I get it to build it is ignoring the inputmenu. package personalprogram; import java.util.Scanner; /** * * @author mitch */ public class PersonalProgram { /** */ public final class InputMenu { public void display_menu() { System.out.println("1) Calculate Cubic feet per hour of room:\n2) Calculate needed CFM of \n3) Option 3"); System.out.print("Selection: "); } public void question() { System.out.println("Would you like to proceed or quit?"); System.out.println("To proceed enter 3."); System.out.println("If you wish to quit enter 0."); Scanner q = new Scanner(System.in); switch (q.nextInt()) { case 0: System.out.println ("Thank you and godbye."); …

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Hi. I'm trying to create a Traffic simulator and I'm stuck on how to get a Car object to turn into a road. I've managed to have a car go straight (which is really easy anyway lol) but I can't really find a way to get it to turn into a road, specifically a left turn. The code I have currently is this: [CODE]import java.applet.*; import java.awt.*; import java.awt.geom.AffineTransform; public class Traffic3 extends Applet implements Runnable { //thread variables Thread t; int i; //double buffer variables Image offscreenImage; Graphics offscr; int width; int height; //car //coordinates for lanes //south road, …

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hi all i am making a weather data program and i having a problem for bringinng my text file to the table. here i am putting all my code . and i also have to import a second output window for my code. for example when ever i enter ome value int he window to compute it should show that value in the other window after compute. i have that code ready but i dont know how to implement in this one. package windchill; import java.awt.Color; import java.awt.Desktop.Action; import java.awt.Font; import java.awt.Toolkit; import java.awt.event.*; import java.io.IOException; import java.text.DecimalFormat; import java.util.Scanner; …

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public int evaluate() { if (root == null) { return -100000; } return evaluateHelper(root); (error) } private int evaluateHelper(MyBinaryTreeNode rt) { if (rt.left == null) { return Integer.parseInt(rt.data.toString()); (error) } switch (rt.data.toString()) { case "+": return evaluateHelper(rt.left) + evaluateHelper(rt.right); case "-": return evaluateHelper(rt.left) - evaluateHelper(rt.right); case "/": return evaluateHelper(rt.left) / evaluateHelper(rt.right); case "*": return evaluateHelper(rt.left) * evaluateHelper(rt.right); case "%": return evaluateHelper(rt.left) % evaluateHelper(rt.right); default: return -100000; } }

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Hi to all! I have SQL Server Express, SQL Server Management Studio 2012. My PC Name is : "SaboorPC" and SQL Server instance name is also "SaboorPC". I am trying to connect my Netbeans to My SQL Server but it is not connecting and giving the following error: "com.microsoft.sqlserver.jdbc.SQLServerException: The connection to the host SABOORPC, named instance saboorpc failed. Error: "java.net.SocketTimeoutException: Receive timed out". Verify the server and instance names and check that no firewall is blocking UDP traffic to port 1434. For SQL Server 2005 or later, verify that the SQL Server Browser Service is running on the host." …

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The End.