I’m trying to change my Id column type from int to bigInt because the records are too big and I’m getting an error if I try to store more records but I’m not sure if it’s safe to just alter the table like this: I’m using Java Springboot to create the entities and Hibernate for pe…
Tag: java
How to Peek the Lowest elements from a List of sorted Streams continously
I started learning about Java Stream, and I am wondering is it possible to only peek the first element of the stream without retrieving it. For example, I have multiple streams, and each of them have integers that are sorted in non-decreasing order, and I want to get a sorted list of all integers, so I’…
Converting a Map into a sorted TreeSet using streams
The code is: Where the HashMap is There are 2 problems I run into using this code. First, for some reason Map.Entry::getValue runs into the error : The target type of this expression must be a functional interface I think the problem here is that the comparator cannot compare between two objects of type Vehic…
AlgoExpert: Validate Subsequence, not passing all test cases
Question: Validate Subsequence on AlgoExpert. Given two non-empty arrays of integers write a function that determines whether the second array is a subsequence of the first one. My code is not passing all test cases, what am I doing wrong? Answer Thanks for everyone’s help! Updated Solution:
how to handle script time out for javascript executer for fetch call
I am executing the below javascript using selenium java script exceuter, I want to return the response fromt the fetch call and want to store it in java variable in code. But below code is showing script time out, any suggestions how can I achive above requirements ??? Answer I’m not how to escape the q…
How to update values of a JFrame main after using a JDialog of Java Swing?
I have a main window called MainFrame which is a jForm to which I update the data depending on a timer, but the problem is that I cannot update the data in the same MainFrame after using the jdialog, since I end up creating another duplicate window, but with the data changed, one with the original timer and t…
How to capture an authorized payment using PayPal Checkout-Java-SDK?
Docs provides HTTP requests as example to “Capture an authorized payment”: https://developer.paypal.com/docs/archive/payments/authorize-and-capture-payments/ Checkout-Java-SDK has only examples for capturing an order: https://github.com/paypal/Checkout-Java-SDK/blob/develop/checkout-sdk-sample/src…
My reverse a string code includes a space at the end of the string
I am a beginner of Java, and would like to reverse the character order of a sentence when I input some words as command line arguments. Here is my code. When I input “This is a pen.”, the output should be “.nep a si sihT”. However, the output of this code is “.nep a si sihT ̶…
How to remove everything from ListView using a button onClick?
How to remove everything from ListView using a button onClick? When i try “fullCourseList.clear();”, I can’t add any more courses and the page is refreshed only after visiting the page again Answer You should save off the adapter so you can call clear() on it. Clearing the list this way will…
Setting connection properties on the URL object
Question: Is there a way to set the connection properties on the URL object? Background: We are connecting to a remote server that requires certain connection properties to be set (e.g. User-Agent but certain proprietary properties as well). We are currently using the setRequestProperty method on the URLConne…