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 th…
Exclude toString method generation that comes with Lombok @Data
I have a class that is annotated with @Data. But I want to exclude the toString() method and provide a custom toString. I just defined a custom toString() method as I usually do if I was not using lombok and it seemed to work. Following is my example. But wanted to know if this is the right way to exclude
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 prin…
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)? Answer Yes both of them Integer.parseInt(“1000”) and Integer.toString(1000) have time complexity O(N) The internal code of Integer.parseInt(“1000”) reads the the strings char by char and covert to…
toString method for a linkedList
I am getting strange output for my toString in my linkedList class. I cannot use any methods, only String concat. So limited in how to approach this. Here is the code: I wrote a JUnit test that: and that noOrderList().toString() comes from: When I run the test I get: Was is the cause of this , in the [, ]
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 …