Tag: null

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 do I store tokens into their own element in a given array?

I am trying to write a method that will use StringTokenizer to break up a user inputted String by a single space and store each word into their own array. The given code is as far I have gotten before getting stuck for 3 hours. I am trying to test out the code by having the for loop print out

Java Null check fails and code proceeds to if statement

I have an if condition within my code and I do not want my code to proceed into the if condition if the value of the variable is Null but for some reason, the condition passes and proceeds to the next part but the value of the field is NULL. I am not sure why this issue is happening. A

Checking null for multiple strings in Java

How can one check for whether one of the strings is not null, only if the rest contain something? Here is an example of how it works, but I feel like there should be a better way to do it. if ((…

Best instructions for null scenario in String approach [closed]

I want to hear opinions and arguments on this topic, I’m pretty undecided. The equals method is the best one for value equality/testing? if (“text”.equals(testString))

Firebase Datasnapshot returns null value

I want to retrieve this value from this node (“id”), and the value i get is null. I have googled so many solutions that this might have to do with asynchronous way or something, i guess? This is the …

How check if an Attribute(object) is null in Java

I need specific data for a report, then I gettin all information from a parent object Object1 It has many attributes, object attributes Object11, Object12, Object13, attr1, attr2… The attributes has many attributes too Object111, Object131, Object132,.. by now I got 5 level data attributes. When I send information to my report it says, Error: cause:null object1.getIdObject11().getIdObject111().getDescription; It trows error

Exceptions or null in java

I have the next doubt. According to good practices of java, how to manage the cases in which the object can not be found and we want to know why. For example, if someone has problems logging in our system and we want to inform them exactly what is the problem, we cannot return null because we lose the reason

Why the if condition runs the other way

the value passed fromjsonObject.getString(“firstName”); to firstNameValidateUser is null as it doesn’t have any value, I need to run the following code which contain String firstName=jsonObject.getString(“firstName”);…. till returnedUser = new User(firstName, lastName, user.userName, user.password, birthDate, position,qualification,email); when the value of firstNameValidateUser is null. How do I check it,I have used the if condition to check if the firstNameValidateUseris null ,but from

Sum with Integer object if not null

I do not know if it is possible in Java but I need a method to do a special “add function”. Let me explain, SHORT VERSION: Is it possible to add an int with an Integer object? I need a method to check if that integer object exists, and add 0 if the object is null, add the correct value