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?

arrays java null stringtokenizer

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

if-statement java null string tostring

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

jpametamodel null SingularAttribute for String field

java jpa null

I have class entity: Usage jpametamodel: its correct work with Patient_.MRN. But I have runtime NullPointerException for field Patient_.firstName. jpametamodel generated with hibernate-jpamodelgen version 5.4.30.Final Answer generated class it’s work:

Checking null for multiple strings in Java

java null string

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. Is there a way to condense this logic into a better approach? EDIT If all strings are null, that’s fine.

Best instructions for null scenario in String approach [closed]

equals if-statement java null string

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago. Improve this question I want to hear opinions and arguments on this topic, I’m pretty…

Variables passes as null to another Java Frame in Netbeans

java jframe null swing

I am trying to take a value from MSSQL to a class. In my login GUI frame the variable passes exactly right, but when i pass that class object to another frame the name (String ograd) variable returns as null. Here’s the teachermanagement.java file: loginGUI.java file where i take variables from my MSSQL…

Is there any other reason why NULL is not allowed in ArrayDeque besides “null is used as a special return value”? [closed]

java null queue

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago. Improve this question Before you try to find duplicate question or downvotes, please let me…

Firebase Datasnapshot returns null value

android firebase-realtime-database java null

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 database, and the highlighted node is the value i would like to get: This is my code: Most apprecia…

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

java null object parent-child

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 …