How can I create a Path to a file which is guaranteed not to exist? I thought about using an “impossible” path name, such as: But somebody could create such a file, making my code fail. Update I have written a method which accepts a Path and then tries to read from the underlying file, and now I am writing
Stack in Java not being able to print in specific order
Currently I’m working on a project that is supposed to be a reverse word guessing game. This is how it should work: The use keeps guessing the word until it is fully spelled out. If the user guesses the letter correctly it is revealed if not it is still reveled as shown below ⚠️ Currently I have a stack containing
Replace class methods with lambda expressions, is it bad practice?
I had a few questions that I’m having trouble finding the answer to, at least in Java. I saw a Class definition in a tutorial where lambdas were being used similar to methods. So I’m curious as to if there is any benefit apart from concise code and style preference. Example: Is this a valid class definition? Is this a
Skip folder if it does not exists using java
I have created a property file in java named prop.properties inside eclipse. In prop.properties file, I have added below lines:- users = user1,user2,user3 where user1 , user2 and user3 are folders. I have created directory named TestDir which contains, user1,user3 folders Suppose if user2 folder is not present in TestDir, I have to skip that and consider the other folder.
Java MultiThreading task, three smokers and one agent
the task consists of three smokers which are three threads and one class called Agent which has three attributes Tobacco, Lighters and Paper. Smokers only have one of these items with them, agent class is supposed to put two items randomly on the table and then Smoker is supposed to check if they are missing those two items and pick
Deserialize empty JSON array into empty TreeMap
I’m new to Java, and I’m wondering how to deserialize an empty JSON array into an empty Java object of type TreeMap<String, MyOtherClass>. Currently, I’m attempting to deserialize a JSON file with an array of objects, and each object into a class called MyClass. The class is roughly as follows: One of the entries in the original JSON is this
How to convert Date string into UTC Date object?
I’m learning Java and come across this issue. I have a date string with the given format. Now I wanted to initialize/create a Date object of UTC timezone. For this, I have tried below code This will convert the time into UTC instead of just creating a date object. Now I’m confused as to which is the correct approach to
Chained Hashing Program; the method is undefined for the type error
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 : class ChainHash : Answer your ChainHash methods
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