I have made multiple methods, and they all have the error called and there is another problem that is Why are the methods undefined? Is there something wrong with the class? Or is there something wrong in someplace I am ignorant about. adding code and the class with methods underneath. code ChainHashEx : clas…
Tag: java
How to change keys from a map in scala
How to change the following keys from the map without any variables full functional to I tried with map and was able to change the keys to the same strings but not to different ones. Answer You can apply a map to all the items but focus only on the keys: You can define f to be a function or
How can I check if a hashmap contains a key of a custom class type?
I have a hashmap whose keys are of a custom class type (class A) and I want to check whether an child class B (B extends A) appears as a key in the map. IntelliJ gives me no warnings for the following code, but it’s not going into the statement. What could be wrong? Answer You are checking if the
Determine minimum number of moves to reach top left corner of 2-D array
I’m working through some leetcode problems and came across this one: I’m given a 2-D array, for example: Each cell in the array represents the number of moves I must make from that cell. I can move only up or only left each time I stop on a cell. I want to find the minimum number of moves necessar…
Does a mutable Java object equal itself? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question I was thinking about mutable objects and how they’re weird (but very cool). Question: c…
how this Ternary Operator work with this statemnt?
i just generate this methode to find max val in some matrix and somehowe i was able to change int val insdie Ternary Operator (java 8) (the method compile and working) im not realy sure evan how its compile from what i saw online Ternary Operator syntax : can someone explain me what im missing here ? Answer T…
Microservices communication with optional parameters requests
I have a room service which returns detail for rooms when requesting http://localhost:8082/room/search/byRoomChar Now I want to request this @GetMapping from the booking service since this is the application gateway that users are going to interact with using the http://localhost:8081/booking/search/byRoomCha…
itext 7 pdf how to prevent text overflow on right side of the page
I am using itextpdf 7 (7.2.0) to create a pdf file. However even though the TOC part is rendered very well, in the content part the text overflows. Here is my code that generates the pdf: Here are the screen shots of TOC part and content part : TOC : Content : What am I missing? Thank you all for
How do I check if my int array is empty, with the standard value being 0?
So I have come across an issue I do not seem to be able to fix. So lets say I have an int array and want to check whether the array still has space to add a certain element (from 0-∞) or has no space left, which would mean I would need to create a new array. The issue is
How to write constructor where the types are from another class in Java?
I’m doing a UML diagram for a Connect four game. It is a two-player connection board game, in which the players choose a color and then take turns dropping colored discs into a seven-column, six-row vertically suspended grid. I have a problem with the UML Diagram. The class game has 2 variables that cam…