in the spirit of teaching you how to fish… these are all directly relevant to problems with your attempt and might help you improve. one trend i see in your regex code is that you are escaping . to make it literal by using \\.. By double-escaping it you are saying that you want a … Read more
You can use the method getScaledInstance from Image. For more information see the Documentation 1 solved How to convert a image in to different sizes [duplicate]
You can simply use the get method. stateIndex.get(nameOfEntry); You set with put and access with get. If you want to get a specific element, just chain the get method for ArrayList. Whatever element = stateIndex.get(nameOfEntry).get(5);// For any type. 1 solved Get ArrayList entry of a HashMap Entry [closed]
…it just says it’s running in the background. I guess I’m not initializing it properly. Without seeing your code it’s hard to tell for sure but assuming that you did not introduce errors copying tutorial code, the most likely reason for the behavior like you describe is that you didn’t invoke Display.setCurrent. This would indeed … Read more
You should be using SimpleDateFormat(“dd-MM-yyyy”). DD is for day in year, like there are 365 days in a year. 3 solved SimpleDateFormat returning incorrect day on given date [closed]
Instead of writing the following which id not valid Java, Paraula tipo1; tipo1 = { Paraula.lletres[0] = ‘t’; Paraula.lletres[1]=’1′; Paraula.llargaria = 2; perhaps you intended to write Paraula tipo1 = new Paraula(); tipo1.lletres[0] = ‘t’; tipo1.lletres[1]=’1′; tipo1.llargaria = 2; However a much cleaner way to do this is to pass a String to the constructor … Read more
Every thing has a limit, If your num is 0000100001000010000001100000, then it’s not possible to convert it in int. You have to convert it in double or float or reduce your String, trying to convert in int with Integer.parseInt(num) will throw you java.lang.NumberFormatException if you need it in double then do this Double.parseDouble(num) see the … Read more
Check this out: try { SimpleDateFormat format1 = new SimpleDateFormat(“MMM dd, yyyy”); SimpleDateFormat format2 = new SimpleDateFormat(“yyyy-MM-dd”); String stringDate = “Dec 13, 2013”; Date date = format1.parse(stringDate); System.out.println(format2.format(date)); } catch (ParseException exp) { // Take appropriate action } Output: 2013-12-13 3 solved How to change the format of date in java [duplicate]
Suppose the original code had been int count; count = 1; This does two things. The first line creates a variable called count, of type int. The second line assigns a value to that variable. Because it’s very common to assign a value to a variable as soon as it’s created, Java lets you combine … Read more
To restart from scratch : What I understand your question should have been : I have a sequence of Strings and want to check the difference between them. Whenever a line is the same as the previous one, i want to increment a counter (that counted the occurence of that line). Whenever a new line … Read more
You have a couple of problems with your code. First, you should stop the loop before i has the value list.size(). (Actually, since the index of the element is not used, you can use an enhanced for loop, which is what I show below.) Second, you need to test for the condition you want, not … Read more
Before mapToDouble you have to use flatMap like this: return collection1.stream() .flatMap(cA -> cA.getCollectionB().stream()) .mapToDouble(ObjectB::getSalary) .sum(); Or you can use map before the flatMap: return collection1.stream() .map(ObjectA::getCollectionB) .flatMap(List::stream) .mapToDouble(ObjectB::getSalary) .sum(); Of you can use flatMapToDouble directly as @Naman mentioned: return collection1.stream() .flatMapToDouble( cA -> cA.getCollectionB().stream().mapToDouble(ObjectB::getSalary) ).sum(); 5 solved Calculate the sum of a field contained … Read more
Your problem is that while the generic parameter of TreeNode is Comparable, the class itself is not. Change this: public static class TreeNode<E extends Comparable<E>> { To this: public static class TreeNode<E extends Comparable<E>> implements Comparable<TreeNode<E>> { Or if you don’t require the generic type to also be Comparable: public static class TreeNode<E> implements Comparable<TreeNode<E>> … Read more
You can use Dynamic Adaptive Streaming over HTTP (DASH) or HTTP Live Streaming(HLS) for rich and smoother streaming. Google has an advanced library called exoplayer for this purpose. Try exoplayer for the purpose. The library and demo is available here The docs are available here The developer guide is available here 3 solved How to … Read more
In short Java Application for Swing based application and JavaFX for JavaFX based application. It depends on what you’re building. Swing has more components around for it (3rd party as well as built in) and not all of them have made their way to the newer JavaFX platform yet. On the other hand, FX provides … Read more