I am creating a list from which the user can select from using Vaadin8. I want to get the values from the Enum but the string values with spaces not the Element Names. Here is the list created to select from the Enum elements: And here are 3 lines I tried that did not work: Answer You can add a
Tag: tostring
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
Long won’t convert to a string in java [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 12 months ago. Improve this question I am trying to convert a long to an integer but nothing seems to work, the code snippet that wont work is ((int)jo.get(“gold”)) The full
How should I go about printing all elements in an ArrayList via a toString in a formatted manner?
What I am asking is that, in Java 8, when I call my toString() method (overridden), I am trying to print out the elements of each respective ArrayList<String> in this manner: But instead, when I return the ArrayList<String>, it is printed in this manner: It makes perfect sense to me why it is printed that way, but I’m not sure
error: incompatible types: String[] cannot be converted to String
I tried taking input of a 6 by 6 matrix in java using the string split function when the string is input in the following way, and to print the matrix. The output that I get is my code: pls, suggest how I can overcome this error Answer When we call split function of String return the String[]. So c[j]
Displaying an ArrayList alphabetically
I have a class written that takes a string, counts the occurrences of each letter within the string and then prints the occurrences of each. I want this to be displayed alphabetically, but not sure …
Integer.parseInt() and Integer.toString() runtime
Would the runtime of Integer.parseInt(String i) and Integer.toString(int i) both be O(n)?
Method invocation ‘toString’ may produce ‘java.lang.NullPointerException’?
When I start the application, everything works normal, but when I press the button enter, it closes alone. I do not know what could be the problem I think this is it, could you please help me I have this code Method invocation ‘toString’ may produce ‘java.lan.NullPointerException’ Can you help me? Please Answer you can replace StringBuilder resul=null; with StringBuilder
Android: java.lang.NullPointerException: Attempt to invoke virtual method ‘java.lang.String java.lang.Object.toString()’ on a null object reference
Facing a problem with a practice app I’m working on. I’m facing a NullPointerException problem relating to the toString method. Being new to android app development, I’m unsure of the exact cause even after my research into this. Hence I ask for someone who is more familiar with the stack trace to kindly help me out. Note: The error occurs
toString() representation output
I have a bug in the code and believe me I’ve run debugging many times to find what’s wrong with code but cannot understand what is wrong. I have to output the contents of 2d Arraylist. For example, if I do: it outputs me the following: But when I change the fourth value, 3, to higher number, for example, 4