How to check the input is an integer or not in Java?
If you are getting the user input with Scanner, you can do: If you are not, you’ll have to convert it to int and catch a NumberFormatException:
Java
Generate a random double in a range
To generate a random value between rangeMin and rangeMax:
MultipartException: Current request is not a multipart request
When you are using Postman for multipart request then don’t specify a custom Content-Type in Header. So your Header tab in Postman should be empty. Postman will determine form-data boundary. In Body tab of Postman you should select form-data and select file type. You can find related discussion at https://github.com/postmanlabs/postman-app-support/issues/576
(Java) Tic-Tac-Toe game using 2 dimensional Array
First off: This will create a infinite loop because row and column shouldn’t change you should ask for new input! Also As soon you hit ‘O’ or ‘X’ you will exit the Method with a false (no winner) What you probably want to check is if every spot is occupied This would now check if there is a winner … Read more
Java TreeMap Comparator
You can not sort TreeMap on values. A Red-Black tree based NavigableMap implementation. The map is sorted according to the natural ordering of its keys, or by a Comparator provided at map creation time, depending on which constructor is used You will need to provide comparator for Comparator<? super K> so your comparator should compare on keys. To provide sort on … Read more
An established connection was aborted by the software in your host machine tomcat jackson
Eh… after hours of debugging and thinking – the answer turned out to be the most obvious one – both clients I have been using were closing the connection (probably timeout). It worked in wget and postman while using swagger and advanced rest client caused the exception to be thrown.
Cannot resolve method in java
Make sure your container (using generics) holds the Question type: That way JAVA knows which method to call.
Displaying Image in Java
Running your code shows an image for me, after adjusting the path. Can you verify that your image path is correct, try absolute path for instance?
mongoDB, connection refused
By default MongoDB only binds to the loopback interface which makes it only accessible from localhost. To change that you need to edit this line in mongod.conf file; you can change it to bind_ip = 127.0.0.1,192.168.1.102 to allow LAN and local connections or you can remove or comment out that line to allow all connections. For more info : MongoDB … Read more