I have a set of files in a folder, and all of them starting with a similar name, except one. Here is an example: I am able to list all the files from the specified folder, but the list is not in an ascending order of the spectrum number. Example: I get the following result when the program is executed:
Tag: arraylist
Unexpected type required variable found value
For some reason this code gives compilation Error ,could anyone explain why? Answer ToFill.get(Position) returns a value where the left-hand side of the assignment must be a variable. Instead, use set(index, element) as follows: However, what you are doing is only valid if you are using arrays, for example: As a side note, always use Java naming convention: toFill instead
Check if arraylist contains only nulls
I think there has to be a better way of doing this.. I have a call to a function that returns an ArrayList. If that ArrayList only returns 10 null items (the default), is there a way of checking this without iterating through all 10 items to see if they are null? Answer Generally, no; there is no other way
ArrayList input java
Im looking at the problem: Write a program which reads a sequence of integers and displays them in ascending order. Im creating an ArrayList (which I am new to) and I want to populate with integers input from the command line. With an array I could use a for loop with but with an ArrayList of unbounded size Im not
Array de-serialization in a Java GUI problems
now I need some help with Serializing my arraylist. Now I have managed to get the serializing aspect working (I think at least), now my problem lays with de-serializing the object. I am making a small address book program. I have a comboBox that stores the addresses with three textboxes above where the user enters: name, address, and phone number.
sort an arraylist of arraylist of integers
I am looking to sort an arraylist of arraylist of integers and I require help? I was informed that I need to implement comparator or comparable and then use the collection.sort to sort the list of list in order… Answer No error check for null lists, but here it is. With Java 8 it gets even more concise:
What is the Simplest Way to Reverse an ArrayList?
What is the simplest way to reverse this ArrayList? Answer Example (Reference):
Check if a String is in an ArrayList of Strings
How can I check if a String is there in the List? I want to assign 1 to temp if there is a result, 2 otherwise. My current code is: Answer
LinkedList: java.lang.OutOfMemoryError: Java heap space
I’m trying to make a graph implementation for an assignment, which has Graph(GraphImp) objects and Node(NodeImp) objects. Node objects contain a reference to their Graph, x & y co-ordinates and a name. The Graph object contains a linked list of its Nodes. The problem occurs when I try to add a Node into the middle of the List of Nodes
data from sqlite into ArrayList
i am using code this blog to have a draggable list. This tutorial is using a custom DragNDropAdapter that takes the content as an ArrayList. In my listActivity i query a table with returned column name.It has 11 values inserted. i tried to convert it to ArrayList from String[] with many ways such as : or what i get is