java

[Solved] How to Implement class Alkio? [closed]

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Why do you expect it to print (1,2,10)? You re-set the values to 2,5, 12 (eka.setAlkio(2, 5, 12);). (although, as commented to the question by @flesk, you don’t actually set them…) you didn’t override the toString method as you should have: public String toString(){ return “(“+rivi+”,”+sarake+”,”+arvo+”)”; } In your constructor, you don’t set the class … Read more

[Solved] How to get number of days between today’s date and last date of the current month? [closed]

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Calendar calendar = Calendar.getInstance(); int lastDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); int currentDay = calendar.get(Calendar.DAY_OF_MONTH); int daysLeft = lastDay – currentDay; System.out.println(“Last Day: ” + lastDay); System.out.println(“Current Day : ” + currentDay); System.out.println(“There are ” + daysLeft + ” days left in the month.”); output Last Day: 30 Current Day : 1 There are 29 days left in … Read more

[Solved] Difference between i++ and i– [closed]

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This is an excellent interview question because any answer you give is likely to be wrong and more importantly be something you never previously thought seriously about. The whole point is to throw you off your game. They want to see how you react when you’re pushed into an area that you feel like you … Read more

[Solved] SSL use symmetric or asymmetric?

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Sender starts the handshake with server. Client starts handshake with server. Server generates a pair of Public and Private key using asymmetric encryption and re-encrypt the Public key alone using symmetric encryption. No. And passes the Public key to the sender. No. It sends its certificate to the client and they then start a secret-key … Read more

[Solved] Is there any function to write 2D Array which fetch the data into csv file?

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You can use CSVWriter for this with writeAll() method. It doesn’t work on two dimensional array, but it works with Iterable<String[]> or List<String[]>, so you will need to do conversion first. String[][] table = …; List<String[]> convertedTable = Arrays.asList(table); CSVWriter writer = new CSVWriter(new FileWriter(csvFilename)); writer.writeAll(convertedTable); writer.close(); 2 solved Is there any function to write … Read more

[Solved] How to use Recurrent Neural Network to play simple 2D Java game?

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Some good library’s can be found in GitHub but that’s not what you should be looking for. To start up you need a training technique for your RNN, i would personally recommend NEAT (Neuroevolution of augmenting topologies) which uses RNN in a Genetic Algorithm, there is many videos explaining how it works and implementations in … Read more

[Solved] Load PowerPoint file in Android

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activity isn’t a defined symbol, but . In this case, since the code is in an activity, use the current object: pptViewer.loadPPT(this, “/home/waheed/lab6.pptx”); You probably copy-pasted from the readme, as the activity used as sample method input in the readme means you have to pass an activity instance. You don’t declare Activity activity = …, … Read more

[Solved] Extract certain substring in Java

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String method: Use StringUtils.substringBetween() of Apache Commons: public static void main(String[] args) { String sentence = “User update personal account ID from P150567 to A250356.”; String id = StringUtils.substringBetween(sentence, “from “, ” to”); System.out.println(id); } Regex method: Use regex from (.*) to, the string surrounded by parentheses is called group(1), just extract it: public static … Read more

[Solved] Change Coordinates directely in the graphe [closed]

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Take a look at Oracle’s tutorial: http://docs.oracle.com/javase/tutorial/2d/advanced/user.html They describe how to recognize clicks within the Graphics2D. They also show how to move a single shape. You have to advance this approach a little bit in order to support multiple elements. 1 solved Change Coordinates directely in the graphe [closed]

[Solved] Exception in thread main error in array program

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int arrayfirst[] [] ={{1,2,3},{2,3,4}}; int arraysecound[] [] ={{3,4,5},{6,7,8}}; here, arrayfirst and arraysecound contain two rows and three columns each (The number of inner curly braces separated by Comma signify number of rows, and the numbers written within these inner curly braces signify number of columns), so when you add their elements and try to store … Read more

[Solved] HttpUrlConnection working on api level < 11, not working on api level >11 on android

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You need to implement all the Network Calls in background Thread via AsyncTask. Here is a dummy template, you can modify it according to your needs: private class LongOperation extends AsyncTask<String, Void, String> { @Override protected String doInBackground(String… params) { //Send your HTTP REQUESTS HERE. return “”; } @Override protected void onPostExecute(String result) { //UPDATE … Read more