I’m trying to put boolean condition in Constructor. The task is to create Object only if the condition is true. In the example below: if checkInitialPass() returns false, the Object should not be created. Answer That’s not possible. You have (at least) two options: 1. Throw an exception 2. Create a static factory method Make the constructor private and create
How to Find Smallest Number Based On User Input – Java
I’m trying to find the smallest number from the inputs (5 inputs) of users. However, every time I click run and write down the numbers, the smallest number will always be “0”. Here is my code: Answer Algorithm: Input the first number and assume it to be the smallest number. Input the rest of the numbers and in this process
Java Swing JButton alignment – BoxLayout
Below is a small example where two radio buttons are offset too far to the left column. However, if I remove the “A” button above by commenting out this code: Then the 2 radio buttons are displayed as expected and not offset: How do I get the radio buttons aligned correctly like the second case, but with the button present?
convert java class to kotlin inherited from FragmentStatePageAdapter
I am doing a project and the only help I have are in java, and it is making it very difficult for me to have to convert it or pass it to kotlin this is the code I have to pass to kotlin: and when trying to convert it, it was more or less like this: According to how little
not setting CLASSPATH in bash
So basically i have a project with a lot of packages and the corresponding jars. im trying to run the program and to do so i need to set my CLASSPATH the thing is when im trying to set it it says …
Randomly getting value with percentage of chance in Java
I would like to be able to return (and in our case, for the example, display) an item of an enumeration, according to a certain predefined percentage of chance for each item. An illustration in code of this enumeration just below : Also, these items will be stored in a List. Namely that, as in this example, two items can
How can I use a child process to run a .class file from a parent directory?
In this case, I am using Node.js ChildProcess. Let’s say the application file (index.js, for example) is in folder1. This folder also has folder2, which is where the class file is. So, when I call spawn from folder1, the command’s current directory is folder1. However, I can’t do java ./folder2/MyFile. Here’s what I tried: Using function run on ./folder2/MyFile returns:
How to serialize a class that extends TreeSet with Jackson?
Class A looks like this: Class B: When I serialize a class A object using Jackson: I get a json Array like this: but the member variables a,b,c are missing. Is there a way I can include them into the json string? Answer Jackson recognises class A as a collection and register CollectionSerializer to serialise A’s instances. We can modify
Do I scan twice if I call scanner.hasNext and then scanner.next
Do I scan twice if I call scanner.hasNext(pattern) and then scanner.next(pattern) with the same pattern on java.util.Scanner Let’s say i have this code with a lots of cases (trying to make a lexer): …
IndexOf in for loop only removes one character
I want to use IndexOf inside a for loop so I can remove all instances of a word/character in a phrase, but my code only deletes the first instance even if I think it should remove the others. Here is my code: The code above gives me this result: I want my code to give me but I don’t understand