Set<String> words = new HashSet<>(); String str = “Java Ruby PHP. Java is good. PHP please looks at Java”; Matcher mat = Pattern.compile(“\\b(\\w+)(?=\\b.*\\1)”).matcher(str); while(mat.find()){ words.add(mat.group(1)); } System.out.println(words); Also you can just split string by words and calculate count using Map. And then filter words with count > 1. 1 solved Trouble with finding a substring … Read more
I have changed your code. Problem was: findViewById(). Activity already have findViewById() method so you can call it in Activity. But Fragment don’t have this method. In Fragment you have to find a View by View.findViewById() method, here View will be the view you are inflating in onCreateView() new ViewPagerAdapter(this). To create a View you … Read more
You can compile Scala into a .class file (e.g. “scalac ./foo.scala”) and run methods from your Java grading program. This might be useful reference: How do you call Scala objects from Java? solved Write Java Program to grade Scala Homeworks
Your problem is that when you create a HomePage it creates a new LoginPage and whenever you create a LoginPage you create a HomePage. This will clearly result in a never ending (until the stack overflows) cycle. To solve the problem, do not create the pages during construction. Make setters for them private static class … Read more
us is a variable of type (class) NumberFormat. getCurrencyInstance() is a static method (a method of the class, not of an object). So this method is not related to a object. But this method generates an object of class NumberFormat (a kind of factory), that is stored in the variable us. now that you have … Read more
Returning code from server is terrible awful. Anyways, this code I give you do some steps: removes new lines and multispaces into one length space from input. finds words by pattern where word starts with if and ends with digits. Adds them to array. prepares pattern with user chosen options combining into similar to (Q4a.NAOK==\”7\” … Read more
You could use a Stack or LinkedList for this. Now with every move of the snakes head you add its position (x,y) to the start of the list and remove the last element if there are more elements in the list as the snake length. And while painting you first paint the background and then … Read more
While fixing your indentation in my IDE, I saw a bunch of compile errors you need to fix. I commented all the areas that need fixing. public class Bouns { final static int DEPT1_EMP = 250; final static int DEPT2_EMP = 500; static Scanner read = new Scanner(System.in); public static void main(String[] args) { double[] … Read more
I think this can be achieved by checking whether the string is a valid url using a regex. This regex is got from another SO post: “\\b(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]” You first check whether url is a valid url using this regex. If the url is something like google.com, it does not match. If the url does not … Read more
Car[] can contain only Car instances, or sub-classes of Car instances. If you were to have a class like this: class Honda extends Car , Honda instances can be populated in the Car array as well, because Honda extends from Car. Object[] can contain any Object instances, or any subclass of Object (every class in … Read more
What you could do is use a StringBuilder that will be initialized with your input String, then use setCharAt(int index, char ch) to modify a given char, this way you avoid building a new String at each iteration as you currently do with the operator += on String. Something like: public String everyNth(String str, int … Read more
MathWorld had a great heart shaped function; http://mathworld.wolfram.com/HeartCurve.html Basically you have to do something like this in your code; float fraction = (float) this.currentStep / (float) this.steps; –> float t = this.currentStep * 2.0 * Math.PI / (float) this.steps; this.x = 16.0 * Math.pow(Math.sin(t), 3.0)); this.y = 13.0 * Math.cos(t) – 5.0 * Math.cos(2.0 * … Read more
public class Persons { int id;//persons id String name;//persons name String email;//persons email public Persons(int idNum, String student, String eAddress){ this.id = idNum; this.name = student; this.email = eAddress; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /** * Id number * @return integer of the id */ public int getId(){ return id; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /** * name of person * … Read more
You need to use the below public class HttpGetWithBody extends HttpEntityEnclosingRequestBase { @Override public String getMethod() { return “GET”; } } HttpGetWithBody getWithBody = new HttpGetWithBody (); getWithBody.setEntity(y(new ByteArrayEntity( “<SOMEPAYLOAD FOR A GET ???>”.toString().getBytes(“UTF8”)));); getResponse = httpclient.execute(getWithBody ); Import needed will be org.apache.http.client.methods.HttpEntityEnclosingRequestBase; solved Send content body with HTTP GET Request in Java [closed]
You are out of array because in for you use i<=s.length but max index of array is s.length-1 But I am interested in this String[] data = new String[(scn.nextLine()).length()]; data = (scn.nextLine()).split(“,”); Why are you creating empty array and then replace it with new one? I think you wanted to create something more like this … Read more