There are two ways: create an instance of your printer class and evoke the method on the printer object: public class MyPrinter { public void printString( String string ) { System.out.println( string ); } } in your main: MyPrinter myPrinter = new MyPrinter(); myPrinter.printString( input ); or 2. you create a static method in your … Read more
I would use the DateTimeFormatter for this. You can find more information in the docs. https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html However, here an example: DateTimeFormatter parser = DateTimeFormatter.ofPattern(“EEE MMM dd HH:mm:ss zzz yyyy”, Locale.US); LocalDateTime date = LocalDateTime.parse(“Sun Apr 01 01:00:00 EEST 2018”, parser); DateTimeFormatter formatter = DateTimeFormatter.ofPattern(“dd-MM-yyyy HH:mm:ss”); System.out.println(formatter.format(date)); //01-04-2018 01:00:00 The Locale.US part is required even if … Read more
As Selvin commented: data is loaded from Firebase asynchronously. You can’t reliably wait for the data to become available. See Setting Singleton property value in Firebase Listener. The solution is to move the code that needs the data from Firebase into the onDataChange in checkDataNew: fun checkDataNew() { var rootRef=FirebaseDatabase.getInstance().getReference(“BG Data”) // Read from the … Read more
At this line: oos.writeObject(“value of i is” + r.i); You serialize the String “value of i is9” literally instead of the object itself. Thus the only possible cast is to the String again. String string = (String) f9.readObject(); To fix this issue, serialize the whole object: rak r = new rak(); r.i = 9; // … Read more
Your constructor declaration is wrong. Constructors look like this: public Dog(String name) { this.name = name; } It does not have the void modifier. The constructor declaration in the class MyDog is correct but it is not correct in Dog. 0 solved Java constructor requires argument
This is partly finished code, to show you the idea what has to be done, but it may have some flaws, it uses Google Guava – http://code.google.com/p/guava-libraries/ import java.io.File; import java.io.IOException; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.List; import com.google.common.io.Files; public class LinesDeleter { private static boolean between; public static void main(String[] args) throws IOException { … Read more
This approach should work… // The variable ‘parts’ will contain 2 items: your 2 integers, though they will still be String objects String[] parts = myString.split(“mod”); try { int firstInt = Integer.parseInt(parts[0]); int secondInt = Integer.parseInt(parts[1]); ) catch(NumberFormatException nfe) { // One of your Strings was not an integer value } 0 solved I want … Read more
Try changing every occurance of FileInputStream to File and change the directory from a folder to the actual file e.g. “C:\text\text2\file.txt”. It should get rid of the error and it also should be able to read the file properly 2 solved Unable to use a Scanner to scan over a PDF Document for a specific … Read more
The first loop just for generating numbers from 2 to 100. The second loop tries to find if the number is divisible by any other number. Here we try to divide a the number with a set of numbers (2 to prime_index). Let’s say the number is 10, the prime index is 10/2 = 5 … Read more
I made a working solution, please find below. public class TestClass { static ArrayList<ArrayList<Integer>> fullData = new ArrayList<>(); static ArrayList<ArrayList<Integer>> finalList = new ArrayList<>(); static int listTwocounter = 0; public static void main(String[] args) { int listOne[] = {1, 2, 3}; int listTwo[] = {7, 8, 9}; int listOneCombination = 2; int listOneSize = 3; … Read more
You have to pass the child object the parents own instance: public class Test { private ObjectClass object; public Test (){ object = new ObjectClass(this); } public void testMethod(){ //does something } } ObjectClass: public class ObjectClass { Test parentInstance; public ObjectClass(Test instance){ parentInstance = instance; } public void callMethod(){ parentInstance.testMethod(); } } solved Java … Read more
You can use split to first split at all linebreaks, then to split each line at the :. Of course you might run into trouble if the password contains a :, but that is a different task. String text = textArea.getText(); String[] lines = text.split(“\r?\n”); List<String> users = new ArrayList<>(lines.length); List<String> passwords = new ArrayList<>(lines.length); … Read more
You have written the following code: private void print(String string) { return string; } But void here is the return type. It thus means you cannot return anything. If you write String instead of void then it will mean that the return type will be a string which is the case and the error will … Read more
Try this, you have to pass in your Adapter and call notifyDataSetChanged on it after you clear the list. @Override protected void onPreExecute() { super.onPreExecute(); postList.clear(); yourAdapter.notifyDataSetChanged(); } Edit: Alternative way private class LoadMoreDataTask extends AsyncTask<Void, Void, List<PostRow>>{ @Override protected void onPreExecute() { super.onPreExecute(); //postList.clear(); //do not clear } @Override protected List<PostRow> doInBackground(Void… params) { … Read more
What you want is the SOWPODS word list. It has all the two-letter and three-letter words used in Scrabble. At the bottom of the Wikipedia article, you’ll find a link to a page where you can download the list. To use the word list efficiently, store it in a trie. With the help of the … Read more