I have looked at a few of them, but none of them help me with the face that I need to compare the guess variable first , then if equal, it must sort according to the gameTime. I have looked through loads of examples explaining comparator/comparable , and they have methods that sort according to 2 different arguments, but they separated. ... |
Hey everyone, i have an array list this is populated with words and the idea is that i need to create a method that takes a string param and enters it in to the array list, however i need the array list to maintain a alphabetical structure is there a way of sorting arraylists alphabetically ? i thought i could do ... |
The single Comparator object is used for all comparisons during the sort. So there's no need to hold individual words as fields in the comparator, or to set them in the constructor. So basically get rid of the constructor for your Sorter class, get rid of the fields, and get rid of the "?????" arguments to the constructor when you instantiate ... |
Hi, I am trying to sort an arrayList which has numbers as values. Data in arrayList: 9, 8, 70, 7, 69, 68, 67, 66, 65, 64, 63, 62, 61, 60, 6, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 5, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 4, 39, 38, 37, 36, 35, 34, 33, 32, ... |
Basically I have created an ArrayList that contains songInfo objects which have three fields: title, artist and trackLength. I need to order the list based on trackLength though when two or more tracks are of the same length, by artist. I've been playing around with sort methods (in Arrays and Collections) for a couple of hours now but I just can't ... |
What is your criteria for one HashMap coming 'before' or 'after' another? You can create a Comparator which contains those rules and pass it to the sort routine. Edit: Sorry, ended up adding nothing to the original answer. If you google "Comparator examples" you'll find some good stuff. Edited by: JEisen on Jul 21, 2009 3:49 PM |
Hi, I'm having two different ArrayLists. One is called allRelatedItems with various kinds of objects, and one with just integers called allRelatedPriorities. The allRelatedPriorities ArrayList can contain any integer in any order. Example: allRelatedItems[neo.xredsys.presentation.PresentationRelationArticle@1e5d207, neo.xredsys.presentation.PresentationRelationArticle@13fe849, neo.xredsys.presentation.PresentationRelationMedia@ab48a7] allRelatedPriorities[1, 4, 2] My goal is to create a new ArrayList called allRelatedItemsSorted. It should contain all the items from allRelatedItems only in the order ... |
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Why should anyone waste any time trying to help you? This is the fourth time you've posted on this same topic in three days. Haven't once returned to even let anyone know that you read responses to previous threads. [http://forums.sun.com/thread.jspa?threadID=5348623] [http://forums.sun.com/thread.jspa?threadID=5348868] [http://forums.sun.com/thread.jspa?threadID=5348929] Anyone trying to help you might as well not, totally pointless. |
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Don't just stuff anything into an ArrayList. Instead create a class to hold the logical information that is contained in your files and have that class implement the Comparable interface. When you read each line of a file, create a new object of this class (if each line contains the complete information needed for each object) and place that object in ... |
I have several ArrayLists with different types of Objects in them (each ArrayList has all of the same object). Each of the types of Object has a method getID() which returns a number I want to sort each ArrayList by this number returned via getID. And I'd like to make the sort as generic as possible, so it'll work for any ... |
Thank=D i did that too but i need to return the number of record i had read from the text file as my return type for readFile method and if i read it this way it will parse every token i read into individual arraylist. Is it possible to read the first record of customer and store it into one arraylist ... |
Construct a new ArrayList from the old one. Loop through the original ArrayList, storing the lowest value for code, and a boolean to check if there are multiple of the lowest code. After every run through, add the object with the lowest code, and if the boolean is true, loop through all the ones sharing that code and insert in order ... |
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I have a list of objects such as the following: ArrayList Details has many fields but I want to sort on only two of them. One of the variables is Date service and the other is double amount. I am assuming I have to use a comparator, but can someone get me started in the right direction. Thanks. |
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Presumably, "xxx.getxxx()" is returning something that is not an ArrayList. So you have to fix that, or change what you're trying to do. Maybe it's a List other than an ArrayList. You don't need to cast it to be an ArrayList specifically, probably. Also are you aware that on the first line, you're creating an ArrayList and then immediately throwing it ... |
there are many examples out there that do just what you are looking for. You need to google some more. Also look into making your class implement the comparable interface, especially if you are going to sort it only one way and not another. Here's one example. It uses arrays not arraylist, but that doesn't really matter much here since the ... |
Okay i have my arraylist and other methods created. Now, i need sort my arraylist objects by their alphabetical field, and then print them. The toString i already have handled. Does anyone know of a SIMPLE sorting method i can use to sort my array objects by alphabetical, so that i can redisplay them in alphabetical order instead of item number? ... |
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Hello, let me first tell you a bit about my scenario, I am creating an auction program running over RMI, my server passes my client an arraylist of auctions (ListOfAuctions), and these auctions are represented by an arraylist themselves (description, start time, current price, etc) Where I'm struggling, is I have to be able to sort the top level auctions arraylist ... |
Hi, I've looked at the Comparator Interface, and looked at the Collections class. In the Collections class it has the method swap() and max() which may be useful but they only work on Lists. I am really confused with how to incorporate this into my code and what exactly I would have to change in order for the code to work ... |
My method need to first pick out elements from an arraylist based on a string value and add these to another arraylist. Then it needs to be sorted by int values. My textbook doesn't really cover this too well, and I haven't found too much on the web. Any help is appreciated. |
Hi everybody, It's been quite a while since I posted here, but I have a programming snafu that I just can't figure out. I have a LinkedHashMap with a String key and an ArrayList value; I'd like to sort the map based on the length of the ArrayList in the value, from largest to smallest. I can't figure it out, does ... |
Hi guys. If I have an ArrayList containing a number of Objects of a class I have created and I want to sort this list based upon an attribute of the objects, is this possible? If that isnt clear , I have a list containing lots of objects of the class Product, and one of the attributes of this is called ... |
compareTo in the jar file that was given to me returns a postice number if this Card is greater than Card passed in, nad a negative number if Card passd in is great than this card. i think this means that i have it right, (in my mind i do), but please let me know if i dont |
Hai , I want to sort an arraylist Consider my arraylist is like below Name Age Place object1 aaa 22 New York object2 ggg 24 London object3 bbb 22 Delhi object4 aaa 23 Tokyo object5 mmm 35 Berlin object6 aaa 23 Moscow And i want to sort according to Name,Age,Place like below Name Age place aaa 22 New York aaa 23 ... |
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