Basically I am working on a project where certain class attributes and names of classes are stored in a text file. The goal here is to create a list of the objects of a certain data type (in this case Car) listed in the text file (of which I have already done), and then assign these to the data types
Tag: object
When passing an object to another Activity using Parcelable, how can I update the object and see the changes in the original Activity?
I am working on a simple texting app in Android. In my MainActivity, when the user clicks on a conversation with someone, I send over my custom Conversation object through an intent using Parcelable. That works perfectly. Problem is, if I change any fields in this object, upon returning to the MainActivity, none of my changes are shown. As far
LinkedList inside a LinkedList iteration in java
Im trying to iterate a Linked List inside of a linked list but I’m not sure how to proceed with it. I’m used to using a passed parameter for what will be iterated but when I’m iterating a linked list …
How to add ArrayList parameter to an ArrayList then then add to current class ArrayList
I have an ArrayList called Service that accepts an enum ServiceType, a double price, and an ArrayList Employee. I’m trying to create a method that adds a service element to the Service ArrayList but I’…
Creating multiple objects using the same instance
I just saw this tutorial creating multiple objects using the same instance by applying the DAO pattern and tried it in a simple console, but I always get this message java.lang.NullPointerException I’m now confused, as far as I know, a constructor can be used once only, and the object will be immutable. Kindly look at this: Fighter.java FightersDAO.java Demo.java Why
How to assign values to Attributes by passing argument using from method?
I need to assign YEAR, MONTH, DAY attributes to values just only using one set method. therefore I pass DATE.YEAR, DATE.MONTH, DATE.DATE as an argument also with values by calling set method line by line. You can make changes anything to the set method. But You cannot make changes to the main method. Answer Mark YEAR, MONTH AND DAY as
Java Bubble Sort String ArrayList Object
Can someone find why this isn’t being sorted I can’t seem to find what I have wrong? The output that is being displayed is how I input them after each other thus the sort method isn’t working… Answer There are three errors: 1. It does i++ instead of i+1. i++ means: return i then increment its value. So t1 and
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
Sort JsonArray by variable key using GSON
I am trying to sort a JsonArray in Java using GSON, I would like to sort everything inside that array via a variable key, meaning there is a string somewhere containing something that is the key that the object needs to be sorted by. Key Variable: varkey1 So it should go like like: Answer Well, you could just implement a
java.util.arraylist cannot be cast to java.lang.object[]
So in my code below, line marked with *** gives me the exception java.util.arraylist cannot be cast to java.lang.object[] I am trying to retrieve a list of users from backendless. I have created a list view that works when normally adding to list. but not when trying to get the response(Object) Answer what you are doing looks a bit long