java

[Solved] How to know what r,g,b values to use for get other colours to paint a JFrame dynamically?

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Your current approach is indeed not easily generalizable. The hard-coded parts of the buttons for “blue” and “green”, and especially the special methods like blueToGreen make it impossible to extend the number of colors with reasonable effort. (You don’t want to create methods blueToYellow, blueToRed, blueToTheThirdColorFromThisListForWhichIDontKnowAName …). There are many possible ways of generalizing this. … Read more

[Solved] NumberFormatException: Invalid long: “588657600000-0400” [closed]

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What about split the input string in 2 values ? Date foo2 = new Date(Long.parseLong(“-588657600000”) + Long.parseLong(“-0400”)); btw, that date is : Mon May 07 16:59:59 BRT 1951 hehehe EDIT : this dont check the input values, and assume allways will have the minus import java.util.Date; public class MiMiMi { public static void main(String[] args) … Read more

[Solved] How to make two dimensional LinkedList in java?

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from your question, I think (not 100% sure) you are looking for java.util.LinkedHashMap<K, V> in your case, it would be LinkedHashMap<String, Double> from java doc: Hash table and linked list implementation of the Map interface, with predictable iteration order. This implementation differs from HashMap in that it maintains a doubly-linked list running through all of … Read more

[Solved] substring methods java

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String.substring() is a method, not a field, meaning you need to call str.substring() rather than simply str.substring. Further, the substring method takes parameters – you have to tell it the specific substring you want in the form of which indexes within the string. str.substring(0, 2) would print characters 0 and 1 (the upper bound is … Read more

[Solved] why some imports cannot be resolved?

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This is because your compiler is not able to find the necessary packages and or libraries that are needed to resolve these imports. These packages must be included in your class path. For example all of the errors regarding org.apache.felix.scr.annotations.x can be resolved after downloading the latest .jar from https://mvnrepository.com/artifact/org.apache.felix/org.apache.felix.scr.annotations/1.11.0 Follow these steps to include … Read more

[Solved] java – string return method is called before any value is assigned to string

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It seems pretty logical to me: You have a first event handling method execution in the EDT which gets the firmware version and then gets the port reader. Getting the firmware version causes an event to be received, in a different thread (and thus in parallel to the execution of portsMethod() in the EDT). The … Read more

[Solved] Need some kind of Clearscreen for Java [duplicate]

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Below is the code sample which works in command prompt import java.io.*; public class ClearDemo { public static void main(String args[])throws IOException,InterruptedException { System.out.println(“Hello ,this is test program”); new ProcessBuilder(“cmd”, “/c”, “cls”).inheritIO().start().waitFor(); } } solved Need some kind of Clearscreen for Java [duplicate]

[Solved] How to check if a number is palindrome in Java? [closed]

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public static boolean isPalindrome(int integer) { int palindrome = integer; int reverse = 0; // Compute the reverse while (palindrome != 0) { int remainder = palindrome % 10; reverse = reverse * 10 + remainder; palindrome = palindrome / 10; } // The integer is palindrome if integer and reverse are equal return integer … Read more

[Solved] How to pass json in request using retrofit services in android studio

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Main thing to consider is Gson gson = new Gson(); String strJsonObject = gson.toJson(OBJECT_OF_YOUR_MODEL_CLASS); strJsonObject is string value you can pass as parameter Here is a code snip how you can achieve it .. ObjectModel objectModel = new ObjectModel(); objectModel.setMobile_number(“123456789”); objectModel.setWork_number(“12345789”); objectModel.setFax_number(“123465”); objectModel.setFirst_name(“first name”); objectModel.setLast_name(“last name”); objectModel.setWebsite(“ww.solution.com”); ArrayList<ObjectModel.Email> emails = new ArrayList<>(); ObjectModel.Email email = … Read more

[Solved] tic tac toe andrdoid studio

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Now the thing is you have nine buttons but you dont know how to assign X or O for the players. I would suggest a solution like this. You have two players (A,B) and if A starts first, for the entire game he’s going to go with label ‘X’ for his turns. For the other … Read more

[Solved] https://livenation-test.apigee.net/mfxapi-tpi/events?apikey=LhNuq4GM6t7PGCzWAqkLY8W0zDbGvQ00&domain_ids=unitedkingdom&lang=en-us&query=Music Events

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https://livenation-test.apigee.net/mfxapi-tpi/events?apikey=LhNuq4GM6t7PGCzWAqkLY8W0zDbGvQ00&domain_ids=unitedkingdom&lang=en-us&query=Music Events solved https://livenation-test.apigee.net/mfxapi-tpi/events?apikey=LhNuq4GM6t7PGCzWAqkLY8W0zDbGvQ00&domain_ids=unitedkingdom&lang=en-us&query=Music Events

[Solved] What’s wrong in that multithread method?

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Problems was not only in threads but in algorithm too: start.set(start.get() + 1); Should be start.set(end.get() + 1); The next thing is that I should set new value to for field start in the beginning and save initial value in thread-local variable. /** * Builds map of anagrams */ private void buildAnagramMap() { System.out.println(“Starting build … Read more